Tunnel secondary lining maintenance device and method for construction site at limit temperature step difference value

Abstract

The invention discloses a tunnel secondary lining maintenance device and method for a construction site in a limiting temperature step difference value. The tunnel secondary lining trolley (1) is used as a supporting body, the maintenance sealing interval assembly is arranged between the tunnel secondary lining trolley (1) and a tunnel secondary lining body, the spraying device (13) is arranged between the maintenance sealing interval assembly and the tunnel secondary lining trolley (1), and the steam generator (8) is arranged between the maintenance sealing interval assembly and the tunnel secondary lining trolley (1). The tunnel secondary lining trolley (1) is provided with a maintenance sealing interval assembly, the fog making device (9) is arranged between the maintenance sealing interval assembly and the tunnel secondary lining trolley (1), through the tunnel secondary lining trolley (1) and the maintenance sealing interval assembly, a maintenance sealing interval is prevented on a tunnel secondary lining body, through a spraying device (13), the tunnel secondary lining body is treated in a saturated water body state, and through a steam generator (8) and the fog making device (9), the maintenance sealing interval is prevented from being generated on the tunnel secondary lining body. A high-temperature and high-humidity curing environment is created for the tunnel secondary lining body, the tunnel secondary lining body is subjected to upper part permeation and maintenance water supplementation in a low-temperature state, and cement particles are fully hydrated in rising high-temperature and high-humidity steam mist clusters; the tunnel secondary lining maintenance device solves the technical problem that the tunnel secondary lining body is maintained by manually spraying water or covering wet cloth, so that the maintenance requirement of the tunnel secondary lining in a construction site at a limit temperature step difference value is met.

Description

Technical Field

[0001] The present invention relates to a tunnel secondary lining curing device and method, and in particular to a tunnel secondary lining curing device and method for a construction site with an extreme temperature step difference. Background Art

[0002] During tunnel construction, the secondary lining is a key part of the tunnel structure, and its construction quality directly affects the safety and durability of the tunnel. The curing process of the secondary lining concrete is crucial for ensuring its strength and durability. Reasonable temperature and humidity control helps to avoid crack generation, improve the density of the concrete, and extend its service life. Therefore, the tunnel secondary lining curing device is an important tunnel construction device. Among the existing tunnel secondary lining curing devices, there is no tunnel secondary lining curing device for a construction site with an extreme temperature step difference. The existing concrete curing methods have the following technical defects. Low curing efficiency: Traditional curing methods are mostly manual spraying or covering with wet cloths, which are cumbersome to operate and have low efficiency, and cannot achieve continuous and uniform curing effects. Serious resource waste: Due to limited temperature and humidity control means and over-reliance on manual operation, it leads to waste of water resources and energy, increasing the construction cost. Unstable curing effect: Manual curing methods are difficult to accurately control temperature and humidity, resulting in uneven temperature and humidity inside the concrete, prone to cracks, and affecting the structural performance. Due to the above technical defects, it cannot meet the curing needs of the tunnel secondary lining in a construction site with an extreme temperature step difference. Through the technical features of infiltrating and supplementing curing water from the upper part of the tunnel secondary lining layer at a low temperature state and carrying out sufficient hydration treatment of cement particles in the rising high-temperature and high-humidity steam water mist group, the present invention effectively explores and researches the technical problems of curing the tunnel secondary lining layer by mostly manual spraying or covering with wet cloths at the technical level. The statements here only provide the background art related to the present invention and do not necessarily constitute the prior art. Based on the technical disclosure provided by the applicant on February 16, 2025, which solves practical technical problems during the working process, and through retrieving similar patent documents, the patent number: ZL2024104240313, as well as the existing technical problems, technical features, and technical effects in the background art, the application technical solution of the present invention is made. Summary of the Invention

[0003] The object of the present invention is a tunnel secondary lining curing device for a construction site with an extreme temperature step difference. The object of the present invention is a tunnel secondary lining curing method for a construction site with an extreme temperature step difference.

[0004] In order to overcome the above-mentioned technical drawbacks, the object of the present invention is to provide a tunnel secondary lining curing device and method for construction sites with extreme temperature step differences, so as to meet the curing requirements of the tunnel secondary lining in construction sites with extreme temperature step differences.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a tunnel secondary lining curing device for construction sites with extreme temperature step differences, which includes a tunnel secondary lining trolley used as a support body, a curing sealing interval component arranged between the tunnel secondary lining trolley and the tunnel secondary lining layer body, a spraying device arranged between the curing sealing interval component and the tunnel secondary lining trolley, a steam generator arranged between the curing sealing interval component and the tunnel secondary lining trolley, and a fog-making device arranged between the curing sealing interval component and the tunnel secondary lining trolley.

[0006] Due to the design of the tunnel secondary lining trolley, the curing sealing interval component, the spraying device, the steam generator and the fog-making device, through the tunnel secondary lining trolley and the curing sealing interval component, a curing sealing interval is prevented on the tunnel secondary lining layer body. Through the spraying device, the tunnel secondary lining layer body is treated in a saturated water body state. Through the steam generator and the fog-making device, a high-temperature and high-humidity curing environment is created for the tunnel secondary lining layer body, realizing upper infiltration and replenishment of curing water for the tunnel secondary lining layer body in a low-temperature state and full hydration of cement particles in the rising high-temperature and high-humidity steam and water mist group, solving the technical problem of curing the tunnel secondary lining layer body mainly by manual spraying or covering with wet cloths, so as to meet the curing requirements of the tunnel secondary lining in construction sites with extreme temperature step differences.

[0007] The present invention designs to connect the tunnel secondary lining trolley, the curing sealing interval component, the spraying device, the steam generator and the fog-making device with each other in the way of upper infiltration and replenishment of curing water for the tunnel secondary lining layer body in a low-temperature state and full hydration of cement particles in the rising high-temperature and high-humidity steam and water mist group.

[0008] The present invention designs to connect the steam generator and the fog-making device with the tunnel secondary lining trolley, the curing sealing interval component and the spraying device in the way of creating a high-temperature and high-humidity curing environment for the tunnel secondary lining layer body.

[0009] The present invention designs that the curing sealing interval component is set to include a sealing strip, a sealing film and an arc-shaped frame.

[0010] The technical effects of the above four technical solutions are as follows: effective curing treatment of the tunnel secondary lining layer body is realized with a high-temperature and high-humidity steam and water mist group different from that in cold regions, meeting the elements required for curing the tunnel secondary lining layer body in cold regions.

[0011] The present invention is designed to further include a first accessory device, and the first accessory device is arranged on the tunnel secondary lining trolley, and the first accessory device is set as a jacking telescopic cylinder.

[0012] The present invention is designed to further include a second accessory device, and the second accessory device is arranged in the maintenance and sealing interval assembly, and the second accessory device is set as a temperature and humidity sensor.

[0013] The present invention is designed to further include a third accessory device, and the third accessory device is arranged on the tunnel secondary lining trolley, the spraying device, the steam generator, the fog-making device, the first accessory device and the second accessory device, and the third accessory device is set as a controller.

[0014] The present invention is designed to further include a fourth accessory device, and the fourth accessory device is arranged in the maintenance and sealing interval assembly, and the fourth accessory device is set as a visual monitoring head.

[0015] The technical effects of the above four technical solutions are as follows: The integrated installation of other components is realized, and the technical effects of the present invention are expanded.

[0016] The present invention is designed to respectively arrange a jacking telescopic cylinder and an arc-shaped frame on the tunnel secondary lining trolley, and respectively arrange a sealing strip, a temperature and humidity sensor and a visual monitoring head on the arc-shaped frame, and arrange a sealing film between the sealing strip and the arc-shaped frame, and respectively arrange a steam generator, a fog-making device and a spraying device between the arc-shaped frame and the tunnel secondary lining trolley, and arrange a controller between the jacking telescopic cylinder, the steam generator, the fog-making device, the spraying device, the temperature and humidity sensor and the visual monitoring head and the tunnel secondary lining trolley.

[0017] The technical effects of the above technical solutions are as follows: Through the tunnel secondary lining trolley, the jacking telescopic cylinder, the sealing strip, the sealing film, the arc-shaped frame, the steam generator, the fog-making device, the spraying device, the temperature and humidity sensor, the visual monitoring head and the controller, the basic technical solution of the present invention is formed, and the technical problem of the present invention is solved.

[0018] The present invention is designed that the tunnel secondary lining trolley is set to have a driving motor and an ear seat at the end of the cross beam Tunnel lining lining Formwork carrier And the control interface of the driving motor of the tunnel secondary lining trolley is set to be connected to the controller through a cable, the ear seat located at the end of the cross beam of the tunnel secondary lining trolley is set to be connected to the arc-shaped frame through an intermediate bolt and nut, and the cross beams respectively arranged on the lower end face of the tunnel secondary lining trolley are respectively connected to the jacking telescopic cylinder, the steam generator, the fog-making device, the spraying device and the controller, and the steam generator, the fog-making device, the spraying device and the controller are set to be arranged at intervals along the longitudinal center line of the tunnel secondary lining trolley.

[0019] The technical effect of the above technical solution is as follows: It realizes the intermediate support in the tunnel without placing other frame supports.

[0020] The present invention designs that the steam generator is an electrothermal steam generator with a steam nozzle, and the horizontal input port section of the steam nozzle is set to be connected to the output port pipeline of the steam generator through a pipeline quick connector. The housing of the steam generator is set to be connected to the tunnel secondary lining trolley, and the control interface of the steam generator is set to be connected to the controller through a cable. The horizontal part of the steam nozzle is set to be connected to the sealing film in a penetrating manner, and the vertical part of the steam nozzle is set to be connected to the arc-shaped frame.

[0021] The present invention designs that the steam nozzle is a T-shaped tubular body with steam nozzles in its vertical part, and multiple steam nozzles are arranged on the steam generator.

[0022] The technical effect of the above two technical solutions is as follows: It realizes the surface position release of high-temperature water vapor.

[0023] The present invention designs that the fog-making device is an ultrasonic high-frequency fog-making machine with a fog-making nozzle, and the input port section of the fog-making nozzle is set to be connected to the output port pipeline of the fog-making device through a pipeline quick connector. The housing of the fog-making device is set to be connected to the tunnel secondary lining trolley, and the control interface of the fog-making device is set to be connected to the controller through a cable. The fog-making nozzle is set to be connected to the sealing film in a penetrating manner, and the fog-making nozzle is set to be connected to the arc-shaped frame.

[0024] The present invention designs that the fog-making nozzles located at the lower part and the middle part of the arc-shaped frame are L-shaped tubular bodies, and the fog-making nozzles located at the upper part of the arc-shaped frame are Z-shaped tubular bodies. Multiple fog-making nozzles are arranged on the fog-making device.

[0025] The technical effect of the above two technical solutions is as follows: It realizes the point position release of water mist.

[0026] The present invention designs that the spraying device is a spraying system with a spraying pipe, and the input port section of the spraying pipe is set to be connected to the output port pipeline of the spraying device through a pipeline quick connector. The housing of the spraying device is set to be connected to the tunnel secondary lining trolley, and the control interface of the spraying device is set to be connected to the controller through a cable. The horizontal part of the spraying pipe is set to be connected to the sealing film in a penetrating manner, and the vertical part of the spraying pipe is set to be connected to the arc-shaped frame.

[0027] The present invention designs a spraying device, which is set as a spraying system having a box body for storing water, an electric heater installed in the box body and used for heating water, and a high-pressure pump installed in the box body and used for outputting water. The box body of the spraying device is set to be connected to the tunnel secondary lining trolley, and the electric heater control interface of the spraying device and the high-pressure pump control interface of the spraying device are respectively set to be connected to a controller. The output port pipeline of the high-pressure pump of the spraying device is set to be connected to the spraying pipe through a pipe quick connector, and the spraying pipe is set to have a double-H-shaped pipe rack longitudinally and a mesh pipe body with spraying nozzles installed on the double-H-shaped pipe rack.

[0028] The technical effects of the above two technical solutions are as follows: realizing the surface position spraying of the water body.

[0029] The present invention designs an arc-shaped frame, which is set to include an end plate part, an inner rod part, an outer rod part, a connecting seat part, a dispersion plate part, a support seat part I, a thrust screw part and a disc part. The end face of the inner rod part is set to be connected to the inner edge of the inner end face of the end plate part. The end face of the outer rod part is set to be connected to the outer edge of the inner end face of the end plate part, and the peripheral side face of the inner rod part is set to be connected to the transverse end face of the connecting seat part. The peripheral side face of the outer rod part is set to be connected to the vertical end face of the dispersion plate part. The end face of the end plate part is set to be connected to the support seat part I, and the upper end head of the thrust screw part is set to be threadedly connected to the support seat part I. The lower end head of the thrust screw part is set to be rotatably connected to the disc part. The peripheral side face of the end plate part is set to be connected to a sealing strip, and the inner rod part and the outer rod part are set to be clamped to the sealing film. The peripheral side faces of the inner rod part and the outer rod part are respectively set to be adhesively connected to the sealing film, and the outer rod part is respectively set to be connected to a fog-making device, a temperature and humidity sensor and a visual monitoring head. The outer rod part located at the lower part is set to be connected to a steam generator, and the outer rod part located at the upper part is set to be connected to a spraying device. The connecting seat part is set to be connected to the tunnel secondary lining trolley through intermediate bolts and nuts, and the dispersion plate part is respectively set to be distributed corresponding to the steam generator, the fog-making device and the spraying device.

[0030] The present invention designs that the end plate part is set as a C-shaped strip, the inner rod part is set as a rod, the outer rod part is set as a rod with a through-hole body, and the through-hole body of the outer rod part is set to be connected to a temperature and humidity sensor and a visual monitoring head through an intermediate bolt and nut. The connecting seat part is set as a T-shaped block with a through-hole body in the vertical part, and the dispersion plate part is set as an L-shaped seat with a C-shaped groove in the horizontal part. The inner rod part and the outer rod part are respectively arranged at intervals along the contour line of the end plate part, and the support seat part I is set as a block with a threaded hole body. The thrust screw part is set as a light column bolt with a through-hole body at the upper end and a convex-shaped head at the lower end, and the disc part is set as a seat with a convex-shaped blind hole in the middle. The threaded hole body of the support seat part I is set to be connected to the thrust screw part, and the convex-shaped head of the thrust screw part is set to be connected to the convex-shaped blind hole of the disc part.

[0031] The technical effects of the above two technical solutions are as follows: The support of the arc body is realized, and the rapid diffusion treatment of high-temperature water vapor and water mist is realized.

[0032] The present invention designs that the sealing strip is set to include a support strip part, a support seat part II and a cylinder shell part, and the outer end face of the support seat part II is set to be connected to the cylinder shell part in a receiving manner. The support strip part is arranged between two adjacent support seat parts II, and the end face of the support strip part is set to be connected to the end face of the support seat part II. One of the support seat parts II is arranged at one end of the sealing strip, and the other support seat part II is arranged at the other end of the sealing strip. The lower end face of the support strip part and the lower end face of the support seat part II are respectively set to be connected to the arc-shaped frame, and the upper end face of the support strip part and the upper end face of the support seat part II are respectively set to be in contact connection with the tunnel secondary lining body. The cylinder shell part of the support seat part II located at the end is set to be connected to the sealing film through an intermediate bolt, and the outer end face of the support seat part II located at the end is set to be in contact connection with the sealing film.

[0033] The present invention designs that the support strip part is set in the state of a sponge strip, the support seat part II is set as a rubber block, the cylinder shell part is set as a threaded pipe body, and the support seat part II and the support strip part are arranged at intervals.

[0034] The technical effects of the above two technical solutions are as follows: The end face sealing is realized by a composite body composed of a sponge strip and a rubber block.

[0035] The present invention designs that the sealing film is set to include a film part and a blocking plate part, and the outer edge of the inner end face of the blocking plate part is set to be in contact connection with the lower side of the side face of the film part. The film part is set to be in covering connection with the arc-shaped frame, and the upper part of the blocking plate part is set to be connected to the sealing strip through an intermediate bolt. The upper end part of the inner end face of the blocking plate part is set to be in contact connection with the sealing strip.

[0036] The present invention designs that the film part is set as a transparent plastic film and the film part is arranged at the lower end face of the arc-shaped frame with a surplus body. The plug baffle part is set as a convex-shaped sheet body with a through-hole body at the upper end part, and the edge of the surplus body is set to be in contact connection with the outer end face of the plug baffle part. The through-hole body of the plug baffle part is set to be in connection with an intermediate bolt located between the plug baffle part and the sealing strip, and the upper part of the outer end face of the plug baffle part is set to be in contact connection with an intermediate bolt flange body located between the plug baffle part and the sealing strip.

[0037] The technical effects of the above two technical solutions are as follows: The covering and sealing are realized by the transparent plastic film.

[0038] The present invention designs that the jacking telescopic cylinder is set as a telescopic electric cylinder, and the housing of the jacking telescopic cylinder is set to be connected with the tunnel secondary lining trolley. The control interface of the jacking telescopic cylinder is set to be connected with the controller through a cable.

[0039] The technical effects of the above technical solution are as follows: The lifting treatment of the tunnel secondary lining trolley is realized.

[0040] The present invention designs that the temperature and humidity sensor is set as an Ethernet type temperature and humidity transmitter, and the housing of the temperature and humidity sensor is set to be connected with the arc-shaped frame through intermediate bolts and nuts. The output interface of the temperature and humidity sensor is set to be connected with the controller through a cable.

[0041] The technical effects of the above technical solution are as follows: The picking up of the curing temperature and humidity signals is realized.

[0042] The present invention designs that the controller is set as a PLC controller, and the housing of the controller is set to be connected with the tunnel secondary lining trolley through intermediate bolts and nuts. The input interface of the controller is set to be connected with the temperature and humidity sensor through a cable, and the output interfaces of the controller are respectively set to be connected with the tunnel secondary lining trolley, the jacking telescopic cylinder, the steam generator, the fog-making device and the spraying device through cables.

[0043] The technical effects of the above technical solution are as follows: The data signal control processing of the curing process is realized.

[0044] The present invention designs that the visual monitoring head is set as a high-definition monitoring camera, and the housing of the visual monitoring head is set to be connected with the arc-shaped frame through intermediate bolts and nuts. The output interface of the visual monitoring head is set to be connected with the visual monitor through a cable.

[0045] The technical effects of the above technical solution are as follows: The picking up of the curing state image signals is realized.

[0046] The present invention designs that the tunnel secondary lining trolley, the sealing strip, the sealing film and the arc-shaped frame, and the steam generator, the fog-making device and the spraying device are arranged in a distribution mode for preparing a composite curing medium body, and the tunnel secondary lining trolley, the sealing strip, the sealing film, the arc-shaped frame, the steam generator, the fog-making device and the spraying device and the jacking telescopic cylinder are arranged in a distribution mode for lifting and customizing the working state. The tunnel secondary lining trolley, the sealing strip, the sealing film, the arc-shaped frame, the steam generator, the fog-making device and the spraying device and the temperature and humidity sensor and the controller are arranged in a distribution mode for controlling the working state, and the tunnel secondary lining trolley, the sealing strip, the sealing film, the arc-shaped frame, the steam generator, the fog-making device and the spraying device and the visual monitoring head are arranged in a distribution mode for picking up image signals.

[0047] The present invention designs that the center line of the tunnel secondary lining trolley, the center line of the sealing strip, the center line of the sealing film and the center line of the arc-shaped frame are arranged on the same straight line. A plurality of jacking telescopic cylinders are arranged on the tunnel secondary lining trolley. Two sealing strips, a plurality of temperature and humidity sensors and a plurality of visual monitoring heads are respectively arranged on the arc-shaped frame. The steam spray pipe, the steam and fog spray pipe and the spray pipe are respectively arranged to be connected to the outer rod part. The film part is arranged to be connected to the inner rod part and the outer rod part. The blocking baffle part is arranged to be connected to the support seat part II and the cylinder shell part. The support bar part and the support seat part II are respectively arranged to be connected to the end head plate part.

[0048] The present invention designs that it further includes a blocking curtain cloth and a blower. The inner end end face of the upper edge body of the blocking curtain cloth is arranged to be in contact connection with the outer end end face of the support bar part and the outer end end face of the support seat part II. The upper edge body of the blocking curtain cloth is arranged to be connected to the cylinder shell part through an intermediate bolt. The blower is arranged on the tunnel ground surface. One section of the lower edge body of the blocking curtain cloth is arranged to be in contact connection with the air outlet port part of the blower, and the air outlet port of the blower is arranged to be distributed corresponding to the tunnel secondary lining trolley.

[0049] The present invention designs that the blocking curtain cloth is arranged to be a heat-insulating cotton curtain with a through-hole body on the upper edge body. The through-hole body of the blocking curtain cloth is arranged to be connected to the intermediate bolt located between the blocking curtain cloth and the cylinder shell part. The outer end end face of the upper edge body of the blocking curtain cloth is arranged to be in contact connection with the intermediate bolt flange body located between the blocking curtain cloth and the cylinder shell part, and the blower is arranged to be a high-pressure hot air blower.

[0050] The technical effects of the above two technical solutions are as follows: External pressurization and temperature increase treatment of the curing and sealing area are realized.

[0051] The present invention designs a method for curing the secondary lining of a tunnel in a construction site with an extreme temperature step difference. The steps are as follows: The tunnel secondary lining trolley and the curing and sealing interval component are used to prevent the curing and sealing interval on the tunnel secondary lining layer body. The spraying device is used to treat the tunnel secondary lining layer body to be in a saturated water state. The steam generator and the fog-making device are used to create a high-temperature and high-humidity curing environment for the tunnel secondary lining layer body, and to achieve upper infiltration of curing water into the tunnel secondary lining layer body at a low temperature state and full hydration of cement particles in the rising high-temperature and high-humidity steam and water mist group.

[0052] The technical effects of the above technical solutions are as follows: It highlights the technical features of upper infiltration of curing water into the tunnel secondary lining layer body at a low temperature state and full hydration of cement particles in the rising high-temperature and high-humidity steam and water mist group, and is introduced for application in the technical field of the method for curing the secondary lining of a tunnel in a construction site with an extreme temperature step difference.

[0053] The present invention is designed with the following steps: Pass the film part through the inner rod part and the outer rod part, leaving a surplus body at the lower end face of the arc-shaped frame. Connect the housing of the temperature and humidity sensor and the housing of the visual monitoring head to the through-hole body of the outer rod part through intermediate bolts and nuts, thereby installing the film part, the temperature and humidity sensor, and the visual monitoring head on the arc-shaped frame. When it is necessary to maintain the secondary lining body of the tunnel, make the controller in a working state, install the torque rod in the through-hole body of the thrust screw part, make the thrust screw part rotate in the threaded hole body of the support seat part I, make the disc part move downward, make the disc part act on the tunnel foundation surface, the convex-shaped head of the thrust screw part rotates in the convex-shaped blind hole of the disc part, make the end plate part move upward, make the arc-shaped frame in a high position state, make the secondary lining trolley of the tunnel in a driving state, drive the secondary lining trolley of the tunnel into the arc-shaped frame, make the secondary lining trolley of the tunnel in a non-driving state, make the thrust screw part rotate in the threaded hole body of the support seat part I in the reverse direction, make the end plate part move downward, align the connecting seat part with the upper ear seat at the crossbeam end of the secondary lining trolley of the tunnel, install the intermediate bolts and nuts between the connecting seat part and the upper ear seat at the crossbeam end of the secondary lining trolley of the tunnel, thereby installing the arc-shaped frame on the secondary lining trolley of the tunnel. Then continue to make the thrust screw part rotate in the threaded hole body of the support seat part I in the reverse direction, separate the disc part from the tunnel foundation surface, make the secondary lining trolley of the tunnel in a driving state, make the arc-shaped frame located at the working position of the secondary lining body of the tunnel to be maintained, make the secondary lining trolley of the tunnel in a driving state, make the jacking telescopic cylinder in an extended state, make the secondary lining trolley of the tunnel move upward, make the secondary lining trolley of the tunnel in a high position state, the upper end faces of the support bar part and the support seat part II act on the secondary lining body of the tunnel respectively, place the blocking baffle part on the support seat part II at the end, place the intermediate bolt in the through-hole body of the blocking baffle part, make the intermediate bolt rotate in the cylindrical shell part of the support seat part II at the end, make the intermediate bolt flange body act on the upper part of the outer end face of the blocking baffle part, install the blocking baffle part on the support seat part II at the end, place the edge of the surplus body on the outer end face of the blocking baffle part, and form a maintenance sealing area on the secondary lining body of the tunnel by the support bar part, the support seat part II, the film part, the blocking baffle part and the surplus body. Connect the horizontal input port section of the steam spray pipe to the pipe quick connector on the steam generator, connect the input port section of the steam mist spray pipe to the pipe quick connector on the fog-making device, connect the input port section of the spray pipe to the pipe quick connector on the spraying device, make the steam generator, the fog-making device and the spraying device in a working state, spray high-temperature water vapor into the lower part of the maintenance sealing area on the secondary lining body of the tunnel by the steam nozzles of the steam spray pipe, spray normal-temperature water mist into the entire area of the maintenance sealing area on the secondary lining body of the tunnel by the steam mist spray pipe, spray water body onto the upper part of the secondary lining body of the tunnel by the spray nozzles of the spray pipe, and maintain the secondary lining body of the tunnel by spraying water body, high-temperature water vapor and normal-temperature water mist.The temperature and humidity signals in the maintenance sealing area on the secondary lining of the tunnel are picked up by the temperature and humidity sensor, and the image signals in the maintenance sealing area on the secondary lining of the tunnel are picked up by the visual monitoring head. After the maintenance of the secondary lining of the tunnel is completed, the thrust screw part rotates in the threaded hole body of the support seat part I, so that the disc part acts on the tunnel foundation surface, separates the horizontal input port section of the steam spray pipe from the pipe quick connector on the steam generator, separates the input port section of the steam mist spray pipe from the pipe quick connector on the fog-making device, separates the input port section of the spray pipe from the pipe quick connector on the spray device, removes the intermediate bolt and nut installed between the connecting seat part and the ear seat at the end of the cross beam of the secondary lining trolley of the tunnel, makes the jacking telescopic cylinder in a contracted state, makes the secondary lining trolley of the tunnel in a low position state, makes the secondary lining trolley of the tunnel in a driving state, drives the secondary lining trolley of the tunnel out of the arc-shaped frame, and the maintenance sealing area composed of the support bar part, the support seat part II, the film part, the baffle part and the surplus body on the secondary lining of the tunnel is used to carry out maintenance environment delay treatment on the secondary lining of the tunnel.

[0054] The technical effect of the above technical solution is that the maintenance operation of the secondary lining of the tunnel can be realized in a cold state.

[0055] The present invention is designed such that first, the spray nozzles of the spray pipe spray water at 28°C - 32°C on the upper part of the secondary lining of the tunnel to wet the secondary lining of the tunnel as a whole. After the whole wetting treatment of the secondary lining of the tunnel is completed, then the steam nozzles of the steam spray pipe spray high-temperature steam at 40°C - 45°C on the lower part of the maintenance sealing area on the secondary lining of the tunnel, the steam mist spray pipe sprays normal-temperature water mist on the entire area of the maintenance sealing area on the secondary lining of the tunnel, the rising high-temperature steam at 40°C - 45°C and the omnidirectional normal-temperature water mist are mixed to obtain a maintenance intermediate medium at 25°C - 35°C, the maintenance sealing area composed of the support bar part, the support seat part II, the film part, the baffle part and the surplus body on the secondary lining of the tunnel balances the maintenance environment, and the controller controls the working states of the steam generator, the fog-making device and the spray device based on the temperature and humidity signals picked up by the temperature and humidity sensor.

[0056] The technical effect of the above technical solution is that the optimal setting of the maintenance process and parameters can be realized.

[0057] The present invention is designed with the following steps: Place the inner end face of the upper edge of the curtain cloth on the outer end faces of the support bar part and the support seat part II. Place the intermediate bolt into the through-hole body of the curtain cloth, and rotate the intermediate bolt in the cylinder shell part so that the intermediate bolt flange body acts on the outer end face of the upper edge of the curtain cloth, thereby installing the curtain cloth on the sealing strip. The film part and the curtain cloth improve the environmental sealing interval in the tunnel secondary lining trolley. Place the blower on the tunnel foundation surface, align the air outlet port of the blower with the improved environmental sealing interval, and place one section of the lower edge of the curtain cloth on the air outlet port part of the blower. Keep the blower in working state, and inject hot air into the improved environmental sealing interval by the blower, so that the improved environmental sealing interval is in a high-pressure and high-temperature state.

[0058] The technical effect of the above technical solution is as follows: It realizes the external pressurization and temperature increase treatment operation for the maintenance sealing interval.

[0059] The technical effect of the present invention is as follows: (I) Performance standards During the maintenance temperature increase stage, the temperature increase rate shall not be greater than 10°C / h. Through the multi-nozzle design and the heating design of the sprayed water, it is ensured that the secondary lining maintenance temperature remains above 25°C, and the humidity should be controlled above 90%. Carry out constant temperature and humidity maintenance for 3 to 5 days (the specific time is adjusted according to the on-site construction process). After the maintenance is completed and the spraying and steam systems are closed, and the temperature is reduced to close to the in-tunnel environmental temperature, the maintenance trolley can be removed.

[0060] Spraying and steam distribution uniformity: The spraying and steam systems should ensure that the moisture and steam in the maintenance area are evenly covered, and the adjustable range of the spraying water volume is 0.5 - 1.0 m3 / min.

[0061] (II) Equipment stability Equipment continuous operation time: Under full load conditions, the equipment should be able to operate continuously to ensure the stability during the long-term maintenance process of tunnel concrete.

[0062] Anti-environmental interference ability: The equipment should be able to operate normally in extreme environments such as plateaus (such as low temperature, low pressure, and dryness) to ensure its maintenance effect in adverse environments.

[0063] System durability: The design life of key components such as steam generators, spraying pumps, and transmission pipelines should not be less than 5 years, and should pass anti-corrosion and high-temperature tests to ensure reliability during long-term operation.

[0064] (III) Safety standards Power system safety: The equipment should be powered by a dedicated line, connected according to the three-level power distribution and two-level protection TN-S system, equipped with overload protection, waterproof design, and automatic power-off function to prevent electrical failures or fire risks in humid environments.

[0065] Pressure control safety: The steam generation system shall be equipped with an overpressure automatic pressure relief device to ensure the safe operation of the system under the condition of internal and external pressure difference.

[0066] (4) Adopt a constant temperature and humidity control mode combining electrothermal steam heating and humidification + warm water spray humidification and cooling + ultrasonic water mist humidification replenishment, which can achieve instant temperature and humidity adjustment. The existence of the spray system can quickly cool down, and the ultrasonic fog-making system can provide steam volume without increasing the temperature, saving the temperature and humidity adjustment time and minimizing the power consumption to a great extent; (5) Control the electrothermal steam system, ultrasonic fog-making system, warm water spray system and automatic water supply system through a programmable logic controller (PLC) to achieve full-intelligent temperature and humidity monitoring, automatic start and stop, data observation and recording download, eliminating manual intervention. In addition, the visual device can be externally connected to a signal to achieve remote real-time observation and monitoring of the surface of the secondary lining during maintenance; In this technical solution, the tunnel secondary lining trolley, steam generator, fog-making device and spray device are basic components and essential technical features of the present invention. The jacking telescopic cylinder, sealing strip, sealing film, arc-shaped frame, temperature and humidity sensor, visual monitoring head and controller are functional components and features for achieving other technical effects of the present invention. The design of these technical features such as the end plate part, inner rod part, outer rod part, connecting seat part, dispersion plate part, support seat part I, thrust screw part, disc part, support bar part, support seat part II, cylinder shell part, film part, blocking baffle part, remaining body, steam spray pipe, steam and fog spray pipe, and spray pipe complies with the technical features of the Patent Law and its implementation regulations.

[0067] In this technical solution, the steam generator and the fog-making device are used to achieve the full hydration treatment of cement particles by infiltrating and replenishing curing water from above the tunnel secondary lining layer in a low-temperature state and carrying out the full hydration treatment of cement particles in a rising high-temperature and high-humidity steam and water mist mass.

[0068] In this technical solution, the tunnel secondary lining trolley, curing seal interval assembly, spray device, steam generator and fog-making device for infiltrating and replenishing curing water from above the tunnel secondary lining layer in a low-temperature state and carrying out the full hydration treatment of cement particles in a rising high-temperature and high-humidity steam and water mist mass are important technical features, and have novelty, creativity and practicality in the technical field of tunnel secondary lining curing devices and methods for construction sites with extreme temperature step differences. The terms in this technical solution can be explained and understood by using the patent documents in this technical field. Description of the Drawings

[0069] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0070] Figure 1 It is a schematic diagram of one of the first embodiments of a tunnel secondary lining curing device for a construction site with an extreme temperature step difference in the present invention. Figure 2 It is a schematic diagram of the connection relationship among the tunnel secondary lining trolley 1, the steam generator 8, the fog-making device 9, and the spraying device 13. Figure 3 It is a schematic diagram of the connection relationship among the sealing strip 5, the sealing film 6, and the arc-shaped frame 7. Figure 4 It is a schematic diagram of the overall structure of one of the first embodiments of a tunnel secondary lining curing device for a construction site with an extreme temperature step difference in the present invention. Figure 5 It is the schematic diagram of the curing monitoring control principle of the present invention. Tunnel secondary lining trolley - 1, jacking telescopic cylinder - 2, sealing strip - 5, sealing film - 6, arc-shaped frame - 7, steam generator - 8, fog-making device - 9, spraying device - 13, temperature and humidity sensor - 15, visual monitoring head - 18, controller - 16, end plate part - 71, inner rod part - 72, outer rod part - 73, connecting seat part - 74, dispersion plate part - 75, support seat part I - 76, thrust screw part - 77, disc part - 78, support bar part - 51, support seat part II - 52, cylinder shell part - 53, film part - 61, blocking baffle part - 62, surplus body - 63, steam spray pipe - 10, steam and fog spray pipe - 12, spraying pipe - 14. Detailed implementation manners

[0071] According to the examination guidelines, terms such as "having", "including", and "comprising" used in the present invention should be understood as not excluding the presence or addition of one or more other elements or their combinations.

[0072] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0073] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0074] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Additionally, unless otherwise specified, the devices and materials used in the following embodiments are commercially available. If the processing conditions are not clearly stated, improvements should be made according to the conventional methods in the art.

[0075] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0076] A tunnel secondary lining curing device for a construction site with an extreme temperature step difference Figure 1 This is one of the first embodiments of the present invention. Specifically describe this embodiment in conjunction with the accompanying drawings. It includes a tunnel secondary lining trolley 1, a lifting telescopic cylinder 2, a sealing strip 5, a sealing film 6, an arc-shaped frame 7, a steam generator 8, a fog-making device 9, a spraying device 13, a temperature and humidity sensor 15, a visual monitoring head 18, and a controller 16. The lifting telescopic cylinder 2 and the arc-shaped frame 7 are respectively arranged on the tunnel secondary lining trolley 1. The sealing strip 5, the temperature and humidity sensor 15, and the visual monitoring head 18 are respectively arranged on the arc-shaped frame 7. The sealing film 6 is arranged between the sealing strip 5 and the arc-shaped frame 7. The steam generator 8, the fog-making device 9, and the spraying device 13 are respectively arranged between the arc-shaped frame 7 and the tunnel secondary lining trolley 1. The controller 16 is arranged between the lifting telescopic cylinder 2, the steam generator 8, the fog-making device 9, the spraying device 13, the temperature and humidity sensor 15, the visual monitoring head 18, and the tunnel secondary lining trolley 1.

[0077] The second of the first embodiments of the present invention. Specifically describe this embodiment in conjunction with the accompanying drawings. In this embodiment, the tunnel secondary lining trolley 1 is set to have a driving motor and an ear seat at the end of the cross beam Tunnel Lining lining Formwork carrierMoreover, the drive motor control interface of the second lining trolley 1 of the tunnel is set to be connected to the controller 16 through a cable. The lug seat at the end of the cross beam of the second lining trolley 1 of the tunnel is set to be connected to the arc-shaped frame 7 through intermediate bolts and nuts. The cross beams on the lower end surface of the second lining trolley 1 of the tunnel are respectively set to be connected to the jacking telescopic cylinder 2, the steam generator 8, the fog-making device 9, the spraying device 13 and the controller 16. The steam generator 8, the fog-making device 9, the spraying device 13 and the controller 16 are arranged at intervals along the longitudinal center line of the second lining trolley 1 of the tunnel.

[0078] Through the second lining trolley 1 of the tunnel, support connection points for the jacking telescopic cylinder 2, the arc-shaped frame 7, the steam generator 8, the fog-making device 9, the spraying device 13 and the controller 16 are formed. By means of the second lining trolley 1 of the tunnel, the connection with the jacking telescopic cylinder 2 is realized, the connection with the arc-shaped frame 7 is realized, the connection with the steam generator 8 is realized, the connection with the fog-making device 9 is realized, the connection with the spraying device 13 is realized, and the connection with the controller 16 is realized. Its technical purpose is: to be used as a support carrier for the jacking telescopic cylinder 2, the arc-shaped frame 7, the steam generator 8, the fog-making device 9, the spraying device 13 and the controller 16.

[0079] In this embodiment, the jacking telescopic cylinder 2 is set as a telescopic electric cylinder, and the housing of the jacking telescopic cylinder 2 is set to be connected to the second lining trolley 1 of the tunnel. The control interface of the jacking telescopic cylinder 2 is set to be connected to the controller 16 through a cable.

[0080] Through the jacking telescopic cylinder 2, support connection points for the second lining trolley 1 of the tunnel and the controller 16 are formed. By means of the jacking telescopic cylinder 2, the connection with the second lining trolley 1 of the tunnel is realized, and the connection with the controller 16 is realized. Its technical purpose is: to be used as a component for lifting the second lining trolley 1 of the tunnel.

[0081] In this embodiment, the arc-shaped frame 7 is provided to include an end plate portion 71, an inner rod portion 72, an outer rod portion 73, a connecting seat portion 74, a dispersion plate portion 75, a support seat portion I 76, a thrust screw portion 77 and a disc portion 78. And the end face of the inner rod portion 72 is arranged to be connected to the inner edge of the inner end face of the end plate portion 71. The end face of the outer rod portion 73 is arranged to be connected to the outer edge of the inner end face of the end plate portion 71. And the peripheral side surface of the inner rod portion 72 is arranged to be connected to the transverse end face of the connecting seat portion 74. The peripheral side surface of the outer rod portion 73 is arranged to be connected to the vertical end face of the dispersion plate portion 75. The end face of the end plate portion 71 is arranged to be connected to the support seat portion I 76. And the upper end of the thrust screw portion 77 is arranged to be threadedly connected to the support seat portion I 76. The lower end of the thrust screw portion 77 is arranged to be rotatably connected to the disc portion 78. The peripheral side surface of the end plate portion 71 is arranged to be connected to the sealing strip 5. And the inner rod portion 72 and the outer rod portion 73 are arranged to be clamped and connected to the sealing film 6. The peripheral side surfaces of the inner rod portion 72 and the outer rod portion 73 are respectively arranged to be adhesively connected to the sealing film 6. And the outer rod portion 73 is respectively arranged to be connected to the fog-making device 9, the temperature and humidity sensor 15 and the visual monitoring head 18. The lower outer rod portion 73 is arranged to be connected to the steam generator 8. And the upper outer rod portion 73 is arranged to be connected to the spraying device 13. The connecting seat portion 74 is arranged to be connected to the tunnel secondary lining trolley 1 through intermediate bolts and nuts. And the dispersion plate portion 75 is respectively arranged to be correspondingly distributed with the steam generator 8, the fog-making device 9 and the spraying device 13.

[0082] Through the arc-shaped frame 7, support connection points for the tunnel secondary lining trolley 1, the sealing strip 5, the sealing film 6, the steam generator 8, the fog-making device 9, the spraying device 13, the temperature and humidity sensor 15 and the visual monitoring head 18 are formed. By the connecting seat portion 74, the connection with the tunnel secondary lining trolley 1 is realized. By the end plate portion 71, the connection with the sealing strip 5 is realized. By the inner rod portion 72 and the outer rod portion 73, the connection with the sealing film 6 is realized. By the dispersion plate portion 75, the connection with the steam generator 8 is realized, the connection with the fog-making device 9 is realized, the connection with the spraying device 13 is realized. By the outer rod portion 73, the connection with the temperature and humidity sensor 15 is realized, the connection with the visual monitoring head 18 is realized. By the support seat portion I 76, the thrust screw portion 77 and the disc portion 78, the lifting support connection treatment for the end plate portion 71 is realized. Its technical purpose is: to be used as a support carrier for the sealing strip 5, the sealing film 6, the temperature and humidity sensor 15 and the visual monitoring head 18.

[0083] In this embodiment, the end head plate part 71 is arranged as a C-shaped strip, the inner rod part 72 is arranged as a rod, the outer rod part 73 is arranged as a rod with a through-hole body, and the through-hole body of the outer rod part 73 is arranged to be connected to the temperature and humidity sensor 15 and the visual monitoring head 18 through an intermediate bolt and nut. The connecting seat part 74 is arranged as a T-shaped block with a through-hole body in the vertical part, and the dispersion plate part 75 is arranged as an L-shaped seat with a C-shaped groove in the horizontal part. The inner rod part 72 and the outer rod part 73 are respectively arranged to be spaced and arranged along the contour line of the end head plate part 71, and the support seat part I 76 is arranged as a block with a threaded hole body. The thrust screw part 77 is arranged as a light column bolt with a through-hole body at the upper end and a convex-shaped head at the lower end, and the disc part 78 is arranged as a seat with a convex-shaped blind hole in the middle. The threaded hole body of the support seat part I 76 is arranged to be connected to the thrust screw part 77, and the convex-shaped head of the thrust screw part 77 is arranged to be connected to the convex-shaped blind hole of the disc part 78.

[0084] Its technical purpose is to achieve arc surface support for the sealing strip 5, rod clamping support for the sealing film 6, and rod support for the temperature and humidity sensor 15 and the visual monitoring head 18.

[0085] In this embodiment, the sealing strip 5 is arranged to include a support strip part 51, a support seat part II 52, and a cylinder shell part 53. The outer end face of the support seat part II 52 is arranged to be connected to the cylinder shell part 53 in a receiving manner. The support strip part 51 is arranged between two adjacent support seat parts II 52, and the end face of the support strip part 51 is arranged to be connected to the end face of the support seat part II 52. One of the support seat parts II 52 is arranged at one end of the sealing strip 5, and the other support seat part II 52 is arranged at the other end of the sealing strip 5. The lower end face of the support strip part 51 and the lower end face of the support seat part II 52 are respectively arranged to be connected to the arc-shaped frame 7, and the upper end face of the support strip part 51 and the upper end face of the support seat part II 52 are respectively arranged to be in contact connection with the tunnel secondary lining body. The cylinder shell part 53 of the support seat part II 52 located at the end is arranged to be connected to the sealing film 6 through an intermediate bolt, and the outer end face of the support seat part II 52 located at the end is arranged to be in contact connection with the sealing film 6.

[0086] Through the sealing strip 5, support connection points for the sealing film 6 and the arc-shaped frame 7 are formed. Through the cylinder shell part 53, the connection with the sealing film 6 is realized. Through the support strip part 51 and the support seat part II 52, the connection with the arc-shaped frame 7 is realized. Its technical purpose is to be used as one of the components for forming a maintenance sealing section on the tunnel secondary lining body.

[0087] In this embodiment, the support strip part 51 is arranged in a sponge strip state, the support seat part II 52 is arranged as a rubber block, the cylinder shell part 53 is arranged as a threaded pipe body, and the support seat part II 52 and the support strip part 51 are arranged to be spaced and arranged.

[0088] Its technical purpose is: to realize an arc-shaped end strip that forms a maintenance and sealing section on the secondary lining body of the tunnel.

[0089] In this embodiment, the sealing film 6 is arranged to include a film part 61 and a blocking baffle part 62, and the outer edge of the inner end face of the blocking baffle part 62 is arranged to be in contact connection with the lower side of the side face of the film part 61. The film part 61 is arranged to be in covering connection with the arc-shaped frame 7, and the upper end part of the blocking baffle part 62 is arranged to be connected to the sealing strip 5 through an intermediate bolt. The upper end part of the inner end face of the blocking baffle part 62 is arranged to be in contact connection with the sealing strip 5.

[0090] Through the sealing film 6, a support connection point for the sealing strip 5 and the arc-shaped frame 7 is formed. By the blocking baffle part 62, the connection with the sealing strip 5 is realized. By the film part 61, the connection with the arc-shaped frame 7 is realized. Its technical purpose is: to be used as one of the components that form a maintenance and sealing section on the secondary lining body of the tunnel.

[0091] In this embodiment, the film part 61 is arranged as a transparent plastic film, and the film part 61 is arranged on the lower end face of the arc-shaped frame 7 with a surplus body 63. The blocking baffle part 62 is arranged as a convex-shaped sheet body with a through-hole body at the upper end part, and the edge of the surplus body 63 is arranged to be in contact connection with the outer end face of the blocking baffle part 62. The through-hole body of the blocking baffle part 62 is arranged to be connected to the intermediate bolt located between the blocking baffle part 62 and the sealing strip 5, and the upper part of the outer end face of the blocking baffle part 62 is arranged to be in contact connection with the intermediate bolt flange body located between the blocking baffle part 62 and the sealing strip 5.

[0092] Its technical purpose is: to realize a covering film and an end head baffle that form a maintenance and sealing section on the secondary lining body of the tunnel.

[0093] In this embodiment, the steam generator 8 is arranged as an electrothermal steam generator with a steam spray pipe 10, and the horizontal input port section of the steam spray pipe 10 is arranged to be connected to the output port pipeline of the steam generator 8 through a pipeline quick connector. The housing of the steam generator 8 is arranged to be connected to the secondary lining trolley 1 of the tunnel, and the control interface of the steam generator 8 is arranged to be connected to the controller 16 through a cable. The horizontal part of the steam spray pipe 10 is arranged to be in through connection with the sealing film 6, and the vertical part of the steam spray pipe 10 is arranged to be connected to the arc-shaped frame 7.

[0094] Through the steam generator 8, a support connection point for the secondary lining trolley 1 of the tunnel, the sealing film 6, the arc-shaped frame 7 and the controller 16 is formed. By the steam generator 8, the connection with the secondary lining trolley 1 of the tunnel is realized, and the connection with the controller 16 is realized. By the steam spray pipe 10, the connection with the sealing film 6 is realized, and the connection with the arc-shaped frame 7 is realized. Its technical purpose is: to be used as a component for spraying high-temperature water vapor into the maintenance and sealing section located on the secondary lining body of the tunnel.

[0095] In this embodiment, the steam nozzle 10 is arranged as a T-shaped tubular body with a steam nozzle in its longitudinal part, and a plurality of steam nozzles 10 are arranged on the steam generator 8.

[0096] Its technical purpose is to achieve the discharge tube type injection of high-temperature water vapor.

[0097] In this embodiment, the fog-making device 9 is arranged as an ultrasonic high-frequency fog-making machine with a fog-making nozzle 12, and the input port section of the fog-making nozzle 12 is arranged to be connected to the output port pipeline of the fog-making device 9 through a pipeline quick connector. The housing of the fog-making device 9 is arranged to be connected to the tunnel secondary lining trolley 1, and the control interface of the fog-making device 9 is arranged to be connected to the controller 16 through a cable. The fog-making nozzle 12 is arranged to be connected to the sealing film 6 in a penetrating manner and the fog-making nozzle 12 is arranged to be connected to the arc-shaped frame 7.

[0098] Through the fog-making device 9, support connection points for the tunnel secondary lining trolley 1, the sealing film 6, the arc-shaped frame 7 and the controller 16 are formed. By the fog-making device 9, the connection with the tunnel secondary lining trolley 1 is realized, the connection with the controller 16 is realized. By the fog-making nozzle 12, the connection with the sealing film 6 is realized, the connection with the arc-shaped frame 7 is realized. Its technical purpose is to be used as a component for spraying normal temperature water mist into the maintenance sealing area located on the tunnel secondary lining layer.

[0099] In this embodiment, the fog-making nozzles 12 located at the lower part and the middle part of the arc-shaped frame 7 are arranged as L-shaped tubular bodies, and the fog-making nozzles 12 located at the upper part of the arc-shaped frame 7 are arranged as Z-shaped tubular bodies. A plurality of fog-making nozzles 12 are arranged on the fog-making device 9.

[0100] Its technical purpose is to achieve the straight tube type injection of normal temperature water mist.

[0101] In this embodiment, the spraying device 13 is arranged as a spraying system with a spraying pipe 14, and the input port section of the spraying pipe 14 is arranged to be connected to the output port pipeline of the spraying device 13 through a pipeline quick connector. The housing of the spraying device 13 is arranged to be connected to the tunnel secondary lining trolley 1, and the control interface of the spraying device 13 is arranged to be connected to the controller 16 through a cable. The horizontal part of the spraying pipe 14 is arranged to be connected to the sealing film 6 in a penetrating manner, and the vertical part of the spraying pipe 14 is arranged to be connected to the arc-shaped frame 7.

[0102] Through the spraying device 13, support connection points for the tunnel secondary lining trolley 1, the sealing film 6, the arc-shaped frame 7 and the controller 16 are formed. By the spraying device 13, the connection with the tunnel secondary lining trolley 1 is realized, the connection with the controller 16 is realized. By the spraying pipe 14, the connection with the sealing film 6 is realized, the connection with the arc-shaped frame 7 is realized. Its technical purpose is to be used as a component for spraying water on the tunnel secondary lining layer.

[0103] In this embodiment, the spraying device 13 is set as a spraying system having a box body for storing water, an electric heater installed in the box body for heating water, and a high-pressure pump installed in the box body for outputting water. The box body of the spraying device 13 is set to be connected to the tunnel secondary lining trolley 1, and the electric heater control interface and the high-pressure pump control interface of the spraying device 13 are respectively set to be connected to the controller 16. The output port pipeline of the high-pressure pump of the spraying device 13 is set to be connected to the spray pipe 14 through a pipe quick connector, and the spray pipe 14 is set to have a double H-shaped pipe rack longitudinally and a net-shaped pipe body with spray nozzles installed on the double H-shaped pipe rack.

[0104] Its technical purpose is to achieve network tube type jet water flow.

[0105] In this embodiment, the temperature and humidity sensor 15 is set as an Ethernet type temperature and humidity transmitter, and the housing of the temperature and humidity sensor 15 is set to be connected to the arc-shaped frame 7 through intermediate bolts and nuts. The output interface of the temperature and humidity sensor 15 is set to be connected to the controller 16 through a cable.

[0106] Through the temperature and humidity sensor 15, a support connection point for the arc-shaped frame 7 and the controller 16 is formed. By the temperature and humidity sensor 15, the connection with the arc-shaped frame 7 is achieved, and the connection with the controller 16 is achieved. Its technical purpose is to be used as a component for picking up temperature and humidity signals in the maintenance and sealing area located on the tunnel secondary lining body.

[0107] In this embodiment, the visual monitoring head 18 is set as a high-definition monitoring camera, and the housing of the visual monitoring head 18 is set to be connected to the arc-shaped frame 7 through intermediate bolts and nuts. The output interface of the visual monitoring head 18 is set to be connected to the visual monitor through a cable.

[0108] Through the visual monitoring head 18, a support connection point for the arc-shaped frame 7 is formed. By the visual monitoring head 18, the connection with the arc-shaped frame 7 is achieved. Its technical purpose is to be used as a component for picking up image signals in the maintenance and sealing area located on the tunnel secondary lining body.

[0109] In this embodiment, the controller 16 is set as a PLC controller, and the housing of the controller 16 is set to be connected to the tunnel secondary lining trolley 1 through intermediate bolts and nuts. The input interface of the controller 16 is set to be connected to the temperature and humidity sensor 15 through a cable, and the output interfaces of the controller 16 are respectively set to be connected to the tunnel secondary lining trolley 1, the lifting telescopic cylinder 2, the steam generator 8, the fog-making device 9, and the spraying device 13 through cables.

[0110] Through the controller 16, support connection points for the secondary lining trolley 1 of the tunnel, the lifting telescopic cylinder 2, the steam generator 8, the fogging device 9, the spraying device 13, and the temperature and humidity sensor 15 are formed. By the controller 16, the connection with the secondary lining trolley 1 of the tunnel is achieved, the connection with the lifting telescopic cylinder 2 is achieved, the connection with the steam generator 8 is achieved, the connection with the fogging device 9 is achieved, the connection with the spraying device 13 is achieved, and the connection with the temperature and humidity sensor 15 is achieved. Its technical purpose is: to be used as a component for processing the signals transmitted by the temperature and humidity sensor 15, and to be used as a component for controlling the working states of the secondary lining trolley 1 of the tunnel, the lifting telescopic cylinder 2, the steam generator 8, the fogging device 9, and the spraying device 13.

[0111] In this embodiment, the secondary lining trolley 1 of the tunnel, the sealing strip 5, the sealing film 6, and the arc-shaped frame 7 are arranged in a distribution manner according to the method of manufacturing the composite curing medium body with the steam generator 8, the fogging device 9, and the spraying device 13, and the secondary lining trolley 1 of the tunnel, the sealing strip 5, the sealing film 6, the arc-shaped frame 7, the steam generator 8, the fogging device 9, and the spraying device 13 are arranged in a distribution manner according to the method of lifting and customizing the working state with the lifting telescopic cylinder 2. The secondary lining trolley 1 of the tunnel, the sealing strip 5, the sealing film 6, the arc-shaped frame 7, the steam generator 8, the fogging device 9, and the spraying device 13 are arranged in a distribution manner according to the method of controlling the working state with the temperature and humidity sensor 15 and the controller 16, and the secondary lining trolley 1 of the tunnel, the sealing strip 5, the sealing film 6, the arc-shaped frame 7, the steam generator 8, the fogging device 9, and the spraying device 13 are arranged in a distribution manner according to the method of picking up image signals with the visual monitoring head 18. The center lines of the secondary lining trolley 1 of the tunnel, the sealing strip 5, the sealing film 6, and the arc-shaped frame 7 are set on the same straight line. A plurality of lifting telescopic cylinders 2 are arranged on the secondary lining trolley 1 of the tunnel. Two sealing strips 5, a plurality of temperature and humidity sensors 15, and a plurality of visual monitoring heads 18 are respectively arranged on the arc-shaped frame 7. The steam spray pipe 10, the steam and fog spray pipe 12, and the spray pipe 14 are respectively arranged to be connected with the outer rod part 73. The film part 61 is arranged to be connected with the inner rod part 72 and the outer rod part 73. The blocking baffle part 62 is arranged to be connected with the support seat part II 52 and the cylinder shell part 53. The support strip part 51 and the support seat part II 52 are respectively arranged to be connected with the end plate part 71.

[0112] The following further describes the present invention in conjunction with embodiments. The following embodiments are intended to illustrate the present invention rather than further limit the present invention.

[0113] A method for curing the secondary lining of a tunnel in a construction site with an extreme temperature step difference. One of the first embodiments of the present invention has the following steps: Pass the film part 61 through the inner rod part 72 and the outer rod part 73, leaving a surplus body 63 at the lower end face of the arc-shaped frame 7. Connect the housing of the temperature and humidity sensor 15 and the housing of the visual monitoring head 18 to the through-hole body of the outer rod part 73 through intermediate bolts and nuts, so as to install the film part 61, the temperature and humidity sensor 15, and the visual monitoring head 18 on the arc-shaped frame 7. When it is necessary to maintain the secondary lining of the tunnel, put the controller 16 in the working state, install the torque rod in the through-hole body of the thrust screw part 77, rotate the thrust screw part 77 in the threaded hole body of the support seat part I 76, move the disc part 78 downward, make the disc part 78 act on the tunnel foundation surface, rotate the convex-shaped head of the thrust screw part 77 in the convex-shaped blind hole of the disc part 78, move the end plate part 71 upward, make the arc-shaped frame 7 in the high position state, make the tunnel secondary lining trolley 1 in the driving state, drive the tunnel secondary lining trolley 1 into the arc-shaped frame 7, make the tunnel secondary lining trolley 1 in the non-driving state, rotate the thrust screw part 77 in the threaded hole body of the support seat part I 76 in the reverse direction, move the end plate part 71 downward, align the connecting seat part 74 with the upper ear seat at the crossbeam end of the tunnel secondary lining trolley 1, install the intermediate bolt and nut between the connecting seat part 74 and the upper ear seat at the crossbeam end of the tunnel secondary lining trolley 1, so as to install the arc-shaped frame 7 on the tunnel secondary lining trolley 1, and then continue to rotate the thrust screw part 77 in the threaded hole body of the support seat part I 76 in the reverse direction, separate the disc part 78 from the tunnel foundation surface, make the tunnel secondary lining trolley 1 in the driving state, make the arc-shaped frame 7 located at the working position of the secondary lining of the tunnel to be maintained, make the tunnel secondary lining trolley 1 in the driving state, make the jacking telescopic cylinder 2 in the extended state, move the tunnel secondary lining trolley 1 upward, make the tunnel secondary lining trolley 1 in the high position state, the upper end faces of the support bar part 51 and the support seat part II 52 act on the secondary lining of the tunnel respectively, put the blocking baffle part 62 on the support seat part II 52 at the end, put the intermediate bolt into the through-hole body of the blocking baffle part 62, rotate the intermediate bolt in the barrel shell part 53 of the support seat part II 52 at the end, make the intermediate bolt flange body act on the upper part of the outer end face of the blocking baffle part 62, install the blocking baffle part 62 on the support seat part II 52 at the end, put the edge of the surplus body 63 on the outer end face of the blocking baffle part 62, and form a maintenance sealing area on the secondary lining of the tunnel by the support bar part 51, the support seat part II 52, the film part 61, the blocking baffle part 62 and the surplus body 63. Connect the horizontal input port section of the steam spray pipe 10 with the pipe quick connector on the steam generator 8, connect the input port section of the steam mist spray pipe 12 with the pipe quick connector on the fog-making device 9, connect the input port section of the spray pipe 14 with the pipe quick connector on the spray device 13, make the steam generator 8, the fog-making device 9 and the spray device 13 in the working state, spray high-temperature water vapor into the lower part of the maintenance sealing area on the secondary lining of the tunnel by the steam nozzles of the steam spray pipe 10, spray normal-temperature water mist into the whole area of the maintenance sealing area on the secondary lining of the tunnel by the steam mist spray pipe 12, spray water body onto the upper part of the secondary lining of the tunnel by the spray nozzles of the spray pipe 14, and maintain the secondary lining of the tunnel by spraying water body, high-temperature water vapor and normal-temperature water mist.The temperature and humidity signals in the maintenance and sealing area on the secondary lining body of the tunnel are picked up by the temperature and humidity sensor 15, and the image signals in the maintenance and sealing area on the secondary lining body of the tunnel are picked up by the visual monitoring head 18. After the maintenance of the secondary lining body of the tunnel is completed, rotate the thrust screw part 77 in the threaded hole body of the support seat part I 76, so that the disc part 78 acts on the tunnel foundation surface, separate the horizontal input port section of the steam spray pipe 10 from the pipe quick connector on the steam generator 8, separate the input port section of the steam mist spray pipe 12 from the pipe quick connector on the fog-making device 9, separate the input port section of the spray pipe 14 from the pipe quick connector on the spray device 13, remove the intermediate bolt and nut installed between the connecting seat part 74 and the ear seat at the crossbeam end of the secondary lining trolley 1 of the tunnel, make the jacking telescopic cylinder 2 in a contracted state, make the secondary lining trolley 1 of the tunnel in a low position state, make the secondary lining trolley 1 of the tunnel in a traveling state, drive the secondary lining trolley 1 of the tunnel out of the arc-shaped frame 7, and the maintenance and sealing area composed of the support bar part 51, the support seat part II 52, the film part 61, the baffle plate part 62 and the surplus body 63 on the secondary lining body of the tunnel is used to perform maintenance environment delay treatment on the secondary lining body of the tunnel.

[0114] In this embodiment, first, the spray nozzles of the spray pipe 14 spray water at 28°C - 32°C on the upper part of the secondary lining body of the tunnel to wet the secondary lining body as a whole. After the overall wetting treatment of the secondary lining body is completed, the steam nozzles of the steam spray pipe 10 spray high-temperature steam at 40°C - 45°C on the lower part of the maintenance and sealing area on the secondary lining body of the tunnel, the steam mist spray pipe 12 sprays normal-temperature water mist on the entire area of the maintenance and sealing area on the secondary lining body of the tunnel, and the rising high-temperature steam at 40°C - 45°C and the omnidirectional normal-temperature water mist are mixed to obtain a maintenance intermediate medium at 25°C - 35°C. The support bar part 51, the support seat part II 52, the film part 61, the baffle plate part 62 and the surplus body 63 form a maintenance and sealing area on the secondary lining body of the tunnel to balance the maintenance environment, and the controller 16 controls the working states of the steam generator 8, the fog-making device 9 and the spray device 13 based on the temperature and humidity signals picked up by the temperature and humidity sensor 15 as the reference signals.

[0115] One of the supporting examples of one of the first embodiments of the present invention. First, the spray nozzles of the spray pipe 14 spray water at 28°C on the upper part of the secondary lining body of the tunnel to wet the secondary lining body of the tunnel as a whole. After completing the overall wetting treatment of the secondary lining body of the tunnel, the steam nozzles of the steam spray pipe 10 spray high-temperature steam at 40°C on the lower part of the maintenance and sealing area located on the secondary lining body of the tunnel. The steam mist spray pipe 12 sprays normal-temperature water mist on the entire area of the maintenance and sealing area located on the secondary lining body of the tunnel. The rising high-temperature steam at 40°C and the all-round normal-temperature water mist are mixed to obtain a maintenance intermediate medium at 25°C. Then, the support strip part 51, the support seat part II 52, the membrane part 61, the blocking baffle part 62, and the surplus body 63 form a balanced maintenance environment in the maintenance and sealing area on the secondary lining body of the tunnel. The controller 16 controls the working states of the steam generator 8, the fog-making device 9, and the spraying device 13 based on the temperature and humidity signals picked up by the temperature and humidity sensor 15 as the reference signals.

[0116] One of the supporting examples of one of the first embodiments of the present invention. First, the spray nozzles of the spray pipe 14 spray water at 32°C on the upper part of the secondary lining body of the tunnel to wet the secondary lining body of the tunnel as a whole. After completing the overall wetting treatment of the secondary lining body of the tunnel, the steam nozzles of the steam spray pipe 10 spray high-temperature steam at 45°C on the lower part of the maintenance and sealing area located on the secondary lining body of the tunnel. The steam mist spray pipe 12 sprays normal-temperature water mist on the entire area of the maintenance and sealing area located on the secondary lining body of the tunnel. The rising high-temperature steam at 45°C and the all-round normal-temperature water mist are mixed to obtain a maintenance intermediate medium at 35°C. Then, the support strip part 51, the support seat part II 52, the membrane part 61, the blocking baffle part 62, and the surplus body 63 form a balanced maintenance environment in the maintenance and sealing area on the secondary lining body of the tunnel. The controller 16 controls the working states of the steam generator 8, the fog-making device 9, and the spraying device 13 based on the temperature and humidity signals picked up by the temperature and humidity sensor 15 as the reference signals.

[0117] One of the supporting examples of the first embodiment of the present invention, specifically the third supporting example: First, the spray nozzles of the spray pipe 14 spray water at 30°C on the upper part of the tunnel secondary lining body to wet the entire tunnel secondary lining body. After the entire wetting treatment of the tunnel secondary lining body is completed, the steam nozzles of the steam spray pipe 10 spray high-temperature steam at 42°C on the lower part of the maintenance and sealing area located on the tunnel secondary lining body. The steam mist spray pipe 12 sprays normal-temperature water mist on the entire area of the maintenance and sealing area located on the tunnel secondary lining body. The rising high-temperature steam at 42°C and the omnidirectional normal-temperature water mist are mixed to obtain a maintenance intermediate medium at 30°C. A balanced maintenance environment for the maintenance and sealing area is formed on the tunnel secondary lining body by the support bar part 51, the support seat part II 52, the membrane part 61, the blocking baffle part 62, and the surplus body 63. The controller 16 controls the working states of the steam generator 8, the fog-making device 9, and the spray device 13 based on the temperature and humidity signals picked up by the temperature and humidity sensor 15 as the reference signals.

[0118] A tunnel secondary lining maintenance device for a construction site with an extreme temperature step difference. The third example of the first embodiment of the present invention will be specifically described in conjunction with the accompanying drawings. It also includes a blocking curtain cloth and a blower. The inner end end face of the upper edge body of the blocking curtain cloth is set to be in contact connection with the outer end end faces of the support bar part 51 and the support seat part II 52. The upper edge body of the blocking curtain cloth is set to be connected to the cylinder shell part 53 through an intermediate bolt, and the blower is arranged on the tunnel foundation surface. One section of the lower edge body of the blocking curtain cloth is set to be in contact connection with the air outlet port part of the blower, and the air outlet port of the blower is set to be distributed corresponding to the tunnel secondary lining trolley 1.

[0119] In this embodiment, the blocking curtain cloth is set as a heat-insulating cotton curtain with through-hole bodies on its upper edge body. The through-hole bodies of the blocking curtain cloth are set to be connected to the intermediate bolts located between the blocking curtain cloth and the cylinder shell part 53. The outer end end face of the upper edge body of the blocking curtain cloth is set to be in contact connection with the flange body of the intermediate bolt located between the blocking curtain cloth and the cylinder shell part 53, and the blower is set as a high-pressure hot air blower.

[0120] Its technical purpose is to achieve a high-pressure environment in the sealing area acting on the membrane part 61 in the tunnel secondary lining trolley 1.

[0121] A tunnel secondary lining curing method for a construction site with an extreme temperature step difference. The third of the first embodiments of the present invention has the following steps: Place the inner end face of the upper edge body of the baffle curtain on the outer end faces of the support bar portion 51 and the support seat portion II 52. Place the intermediate bolt into the through-hole body of the baffle curtain, and rotate the intermediate bolt in the cylindrical shell portion 53 so that the intermediate bolt flange body acts on the outer end face of the upper edge body of the baffle curtain, thereby installing the baffle curtain on the sealing strip 5. An improved environmental sealing interval is obtained in the tunnel secondary lining trolley 1 by the film portion 61 and the baffle curtain. Place the blower on the tunnel foundation surface, and align the air outlet port of the blower with the improved environmental sealing interval. Place one section of the lower edge body of the baffle curtain on the air outlet port portion of the blower, and put the blower into working state. Inject hot air into the improved environmental sealing interval by the blower, so that the improved environmental sealing interval is in a high-pressure and high-temperature state.

[0122] When verifying the present invention, the inventor abandoned the prior art features of mostly manually spraying water or covering with wet cloth for curing the tunnel secondary lining body. Firstly, the technical features of infiltrating and supplementing curing water from the upper part of the tunnel secondary lining body at low temperature and fully hydrating cement particles in the rising high-temperature and high-humidity steam and water mist group were proposed, obtaining the first unexpected technical effect: realizing the factors required for curing composite cement mortar in a tunnel at a construction site with an extreme temperature step difference, improving the curing effect of the tunnel secondary lining body, obtaining the second unexpected technical effect: realizing water body collision at the lower part of the tunnel secondary lining body in a construction site with an extreme temperature step difference, improving the water saturation in the tunnel secondary lining body, obtaining the third unexpected technical effect: realizing the tunnel secondary lining trolley 1 as a support body, improving the curing efficiency of the tunnel secondary lining body, obtaining the fourth unexpected technical effect: realizing a curing seal interval composed of a sealing strip 5, a sealing film 6 and an arc-shaped frame 7, obtaining a frame support border sealing component, improving the support strength of the curing seal interval assembly, and the sealing strip 5 and the sealing film 6 satisfying the overall external sealing treatment of the tunnel secondary lining body, improving the sealing effect of the tunnel secondary lining body, obtaining the fifth unexpected technical effect: realizing the lifting of the tunnel secondary lining trolley 1 by the lifting telescopic cylinder 2, improving the sealing performance between the sealing strip 5 and the tunnel secondary lining body, obtaining the sixth unexpected technical effect: realizing the temperature and humidity adjustment of the curing seal interval by the steam generator 8 and the fog-making device 9, realizing the combination of rising high-temperature water steam and pointwise released water mist, improving the temperature and humidity adjustment effect of the curing seal interval, obtaining the seventh unexpected technical effect: realizing the water replenishment of the tunnel secondary lining body by the spraying device 13, passing through the water flow surface from top to bottom of the tunnel secondary lining body, improving the water replenishment effect of the tunnel secondary lining body, obtaining the eighth unexpected technical effect: realizing the picking up of curing temperature and humidity signals by the temperature and humidity sensor 15, improving the stability of the curing environment of the tunnel secondary lining body, obtaining the ninth unexpected technical effect: realizing the picking up of curing state image signals by the visual monitoring head 18, realizing the on-line observation of the curing process of the tunnel secondary lining body, obtaining the tenth unexpected technical effect: realizing the automatic control of the curing process of the tunnel secondary lining body by the controller 16, improving the coherence of the curing process of the tunnel secondary lining body, obtaining the eleventh unexpected technical effect: realizing the external environmental improvement of the film part 61 by the curtain cloth and the blower, making the curing seal interval in an external supplementary pressure and temperature state, simulating the curing of the tunnel secondary lining body under normal pressure and normal temperature, improving the curing efficiency of the tunnel secondary lining body, obtaining the twelfth unexpected technical effect: realizing the mixing of normal temperature water mist sprayed at point positions with the high-temperature water steam group at 40°C - 45°C and then rushing towards the tunnel secondary lining body, improving the stability of the temperature value of the curing intermediate medium at 25°C - 35°CA maintenance intermediate medium with circular motion is formed, improving the maintenance effect of the secondary lining of the tunnel.

[0123] In the second embodiment of the present invention, the tunnel secondary lining trolley 1, the maintenance sealing interval assembly, the spraying device 13, the steam generator 8 and the fog-making device 9 are interconnected in such a way that the upper part of the secondary lining of the tunnel is infiltrated and supplemented with maintenance water at a low temperature state, and the cement particles are fully hydrated in the rising high-temperature and high-humidity steam and water mist group.

[0124] In this embodiment, the steam generator 8 and the fog-making device 9 are connected to the tunnel secondary lining trolley 1, the maintenance sealing interval assembly and the spraying device 13 in such a way as to create a high-temperature and high-humidity maintenance environment for the secondary lining of the tunnel.

[0125] In this embodiment, the maintenance sealing interval assembly is set to include a sealing strip 5, a sealing film 6 and an arc-shaped frame 7.

[0126] In this embodiment, it also includes a first accessory device and the first accessory device is arranged on the tunnel secondary lining trolley 1, and the first accessory device is set as the jacking telescopic cylinder 2.

[0127] In this embodiment, it also includes a second accessory device and the second accessory device is arranged in the maintenance sealing interval assembly, and the second accessory device is set as the temperature and humidity sensor 15.

[0128] In this embodiment, it also includes a third accessory device and the third accessory device is arranged on the tunnel secondary lining trolley 1, the spraying device 13, the steam generator 8, the fog-making device 9, the first accessory device and the second accessory device, and the third accessory device is set as the controller 16.

[0129] In this embodiment, it also includes a fourth accessory device and the fourth accessory device is arranged in the maintenance sealing interval assembly, and the fourth accessory device is set as the visual monitoring head 18.

[0130] The second embodiment of the present invention is based on the first embodiment. In the second embodiment of the present invention, the steps are as follows: the tunnel secondary lining trolley 1 and the maintenance sealing interval assembly realize the prevention of the maintenance sealing interval on the secondary lining of the tunnel, the spraying device 13 realizes the treatment of the secondary lining of the tunnel in a saturated water body state, the steam generator 8 and the fog-making device 9 realize the creation of a high-temperature and high-humidity maintenance environment for the secondary lining of the tunnel, and realize the upper infiltration and supplementation of maintenance water for the secondary lining of the tunnel at a low temperature state and the full hydration of cement particles in the rising high-temperature and high-humidity steam and water mist group.

[0131] The second embodiment of the present invention is based on the first embodiment. The application process of the present invention: Currently, the maintenance technical methods for the secondary lining of tunnels generally include wet maintenance by sprinkling water or combined with covering wet materials, maintenance by covering plastic films, and steam maintenance. Wet maintenance is more suitable for areas with moderate temperatures. In contrast, film maintenance and steam maintenance can provide a certain heat insulation environment, so they are more suitable for low-temperature or cold regions. However, with the expansion of tunnel construction scope, in extreme environments such as plateaus, extremely cold regions, and arid areas, environmental problems such as water resource shortage, difficult temperature control, and large temperature differences between day and night limit the maintenance effect, and the maintenance temperature and humidity cannot immediately meet the changes brought by the environment. This requires further improvement and innovation of maintenance technologies, especially the research and development of maintenance equipment and technologies suitable for these special environments.

[0132] The energy-saving temperature and humidity intelligent control maintenance trolley for the secondary lining has precise water volume, temperature, and steam control functions. It can automatically adjust the spraying volume, steam output, and maintenance temperature control according to the on-site temperature and humidity, realizing fully intelligent and automated maintenance operations. This equipment consists of six major parts: a high-temperature steam generation system, an ultrasonic steam atomization system, a warm water spraying system, an intelligent monitoring and control program system, an electric power system, and the main frame system of the sealing system. It can adapt to various complex tunnel environments and greatly improve the efficiency and accuracy of maintenance operations.

[0133] It consists of a main frame, a top extension system, and a walking system. The main frame is 12m long longitudinally, which is used to bear the self-weight of the trolley and at the same time serves as the installation platform for devices such as steam generators, ultrasonic atomizers, steam water tanks, spraying water tanks, PLC full-automatic constant temperature and humidity controllers, and intelligent monitoring systems, and supports the sealing system. The top extension system supports the trolley to be sealed and extended to the surface of the secondary lining to form a tight sealing space. The walking mechanism consists of a reducer, an anti-slip device, rubber tires, etc., providing functions for the trolley to move forward, backward, and stand still.

[0134] It consists of end sealing and annular surface sealing. Sponges are used at the ends and fixed on the surrounding brackets of the trolley frame. During operation, it is closely attached to the surface of the lining concrete through telescopic hydraulic cylinders. The annular surface sealing uses a high-strength tensile fireproof steam sealing cover, and visual windows are opened every 3m up, down, left, and right. The visual windows are spliced by transparent heat insulation films and the sealing cover, so that the lining concrete forms a sealed space covered with a waterproof and heat insulation composite material on the surface and sealed with sponges at the ends. The sealing system should ensure that the temperature fluctuation value ≤ ±2°C and the humidity fluctuation value ≤ ±5% during constant temperature and humidity maintenance. Calculate the maximum maintenance space for a double-track tunnel = 22.3m * 0.3m * 12m = 80.4m³.

[0135] The maintenance system mainly includes an electric heating steam generation system, an ultrasonic high-frequency atomization system, a warm water spraying system, and a circulating water supply system. The following is an introduction: The electrothermal steam generation system consists of an electrothermal steam generator, steam pipelines, steam nozzles, etc. The steam generated by the steam generator is transported through the steam pipelines into the sealed space, mainly to raise the temperature of the lining curing, and at the same time the system ensures the internal humidity. It includes 2 electrothermal steam generators of 60kW and 2 of 48kW, 6 main pipelines and 6 secondary pipelines for steam transmission, and 216 120° wide-angle conical steam nozzles (with a spacing of 30cm, a total of 36*6 = 216). The secondary pipelines are located at the 3rd, 4th, and 5th longitudinal support rods of the trolley. The steam temperature at the nozzles is as high as 40°C. The 120° wide-angle conical steam nozzles can prevent high-temperature steam from directly acting on the concrete and causing local damage. In the calculated sealed curing space, the steam can fill the curing space within 10 minutes.

[0136] It consists of 2 ultrasonic high-frequency fog-making machines of 10kW and 6 atomized water transmission pipelines. The normal-temperature water mist generated by the ultrasonic fog-making machines is transported through the water mist pipelines into the sealed space. The 3 pipelines on each side are located at the 3rd, 5th, and 7th longitudinal support rods of the trolley, which can be used to supplement the humidity of the curing space without raising the temperature. When the ambient humidity monitoring is lower than 90%, it will automatically start for humidity replenishment.

[0137] It consists of a spray pump, a heater, a 2.6m 3 water tank and spray transmission pipelines. The main pipeline connects the secondary pipelines on both sides of the trolley to the spray pump. The 4 spray secondary pipelines are respectively located at the 5th and 7th longitudinal support rods of the trolley. The secondary pipes are perforated every 50cm, with a total of 88 spray heads, and the spraying angle is perpendicular to the concrete surface. The heater keeps the temperature of the sprayed water at about 30°C, avoiding too low local curing temperature. The 30°C warm water spray can quickly wet the surface of the secondary lining and rapidly reduce the curing environment temperature. When the temperature is higher than 35°C, it will automatically start for cooling.

[0138] It consists of a water tank, water pipes, and an automatic water pumping system. It is equipped with 2 water supply tanks of 2m³ and 1 water supply tank of 2.6m³. The 2m³ water supply tank is responsible for supplying the electrothermal steam generator and the ultrasonic high-frequency fog-making machine, and the 2.6m³ water supply tank is solely responsible for the spray system. The automatic water supply system is led out from the original tunnel water pipes, automatically senses and adds water, and does not require manual water addition.

[0139] It consists of a temperature and humidity sensor, a PLC intelligent constant temperature and humidity control box, a control unit, a monitoring box, 4 visible cameras, a visible monitoring control device, and a monitoring screen. It automatically reads the temperature and humidity in the steam curing space, automatically controls the start and stop, and realizes zonal control, achieving fully intelligent automatic adjustment. The visible devices are externally connected to signals, enabling remote real-time observation and monitoring of the surface of the secondary lining during curing.

[0140] The temperature and humidity sensors are evenly arranged in 3 lines and are respectively installed on the trolley brackets corresponding to the left and right arch waists and the arch crown. There are 4 evenly arranged longitudinally at the arch crown, and 2 are arranged at each of the two arch waists on both sides, for a total of 8.

[0141] Combination of spraying and steam: The equipment is equipped with both an electrothermal high-temperature steam system and an ultrasonic low-temperature fogging system. Different-temperature steam is generated by an electrothermal steam generator and an ultrasonic fogger respectively. According to the concrete curing requirements, the system evenly distributes an appropriate amount of steam and spraying water on the concrete surface through a spraying device to ensure that the concrete is evenly heated and moistened, promoting the hydration reaction and accelerating strength growth.

[0142] Real-time temperature and humidity monitoring and intelligent control system: The equipment is equipped with real-time temperature and humidity sensors, which can continuously monitor the temperature and humidity data at various points in the closed curing area. According to the average temperature and humidity results measured at each point, the overall closed curing environment is automatically adjusted through an intelligent control program system to ensure that the curing conditions of the concrete always maintain a temperature of 25°C - 35°C and a humidity of over 90%. In addition, the equipment is also equipped with a camera monitoring system, which jointly checks the curing degree in combination with the observation window.

[0143] When the space humidity is below 90%, start the ultrasonic atomizer; When the temperature is below the set temperature, start the electrothermal steam generator; When the temperature is above the set temperature, start the spraying system to quickly cool down.

[0144] The schematic diagram of the curing monitoring control is as attached Figure 5 , and the technological process and operation key points of the energy-saving temperature and humidity intelligent control curing trolley for the secondary lining are as follows: (1) Before starting work, check various parts of the equipment, such as the electrical system, steam generator, spraying system, water storage system, monitoring equipment, etc., and adjust the equipment settings according to the actual environmental conditions to ensure the normal operation of the equipment. Also ensure that the safety protection devices of the equipment are normal, including electrical overload protection, overpressure relief device and waterproof measures.

[0145] (2) Turn on the power of the equipment, push the curing trolley forward closely following the secondary lining trolley. After reaching the designated position, confirm that there is sufficient water in the water storage bin, start the intelligent control system, and set the spraying water volume, steam temperature and curing time through the control panel according to the environmental data and curing requirements.

[0146] (3) During the curing process, start the spraying system, and the intelligent system will automatically adjust the spraying volume as needed. At the same time, start the steam generation system, deliver the steam to the concrete surface, and automatically adjust the steam output according to the temperature and humidity monitoring equipment. Confirm the sealing of the curing environment during the curing process to achieve and maintain appropriate temperature and humidity.

[0147] After the curing is completed, manually stop the spraying and steam systems according to the preset curing time. The dedicated personnel export and record the temperature and humidity data during the curing process, clean the equipment, and check for blockages in the spraying system or dirt in the steam pipes to ensure the normal operation of the equipment during the next curing.

[0148] The present invention has the following characteristics: 1. Due to the design of the tunnel secondary lining trolley 1, the curing sealing interval assembly, the spraying device 13, the steam generator 8, and the fog-making device 9, through the tunnel secondary lining trolley 1 and the curing sealing interval assembly, a curing sealing interval is realized on the tunnel secondary lining layer body. Through the spraying device 13, the tunnel secondary lining layer body is treated in a saturated water state. Through the steam generator 8 and the fog-making device 9, a high-temperature and high-humidity curing environment is created for the tunnel secondary lining layer body, realizing the upper infiltration and replenishment of curing water for the tunnel secondary lining layer body at a low temperature state and the full hydration treatment of cement particles in the rising high-temperature and high-humidity steam and water mist group, solving the technical problem of curing the tunnel secondary lining layer body mainly by manual spraying or covering with wet cloths. Therefore, it meets the curing requirements of the tunnel secondary lining in construction sites with extreme temperature step differences.

[0149] 2. Due to the design of the sealing strip 5, the sealing film 6, and the arc-shaped frame 7, an external curing sealing interval covering for the tunnel secondary lining layer body is realized.

[0150] 3. Due to the design of the jacking telescopic cylinder 2, a close connection between the sealing strip 5 and the tunnel secondary lining layer body is realized.

[0151] 4. Due to the design of the temperature and humidity sensor 15, the picking up of the curing temperature and humidity signals is realized.

[0152] 5. Due to the design of the controller 16, the automatic control of the curing process is realized. 6. Due to the design of the visual monitoring head 18, the online image observation of the curing state of the tunnel secondary lining layer body is realized.

[0153] 7. Due to the limitation of the numerical range for the structural shape, the numerical range is a technical feature in the technical solution of the present invention, not a technical feature obtained by formula calculation or by a finite number of experiments. Experiments show that the technical features of this numerical range have achieved good technical effects.

[0154] 8. Due to the design of the technical features of the present invention, through the combined action of the technical features alone and with each other, experiments show that the performance indicators of the present invention are at least 1.7 times those of the existing performance indicators, and it has good market value through evaluation.

[0155] There are also other technical features connected to the tunnel secondary lining trolley 1, the maintenance sealing interval component, the spraying device 13, the steam generator 8, and the fog-making device 9, which are used to supplement the maintenance water by upper penetration to the tunnel secondary lining body in a low-temperature state and to fully hydrate the cement particles in the rising high-temperature and high-humidity steam and water mist group. All of these are one of the embodiments of the present invention. Moreover, the technical features of the above-mentioned embodiments can be combined arbitrarily. To meet the requirements of the Patent Law, the Patent Implementing Regulations, and the Examination Guidelines, the embodiments of all possible combinations of the various technical features in the above-mentioned embodiments will not be described one by one.

[0156] The above-mentioned embodiments are only one implementation form of the tunnel secondary lining maintenance device and method provided by the present invention for construction sites with extreme temperature step differences. Other deformations of the solution provided by the present invention, adding or reducing features or steps therein, or applying the present invention to other technical fields close to the present invention, all fall within the protection scope of the present invention.

Claims

1. A tunnel secondary lining maintenance device for a construction site with an extreme temperature step difference, characterized in that: The invention comprises a tunnel secondary lining trolley (1) used as a support body, a maintenance sealing interval component arranged between the tunnel secondary lining trolley (1) and the tunnel secondary lining body, a spray device (13) arranged between the maintenance sealing interval component and the tunnel secondary lining trolley (1), a steam generator (8) arranged between the maintenance sealing interval component and the tunnel secondary lining trolley (1), and a fogging device (9) arranged between the maintenance sealing interval component and the tunnel secondary lining trolley (1).

2. The tunnel secondary lining maintenance device for use in a construction site with an extreme temperature step difference according to claim 1 is characterized in that: The tunnel secondary lining trolley (1), the maintenance sealing interval assembly, the spray device (13), the steam generator (8) and the fogging device (9) are interconnected in a manner that the tunnel secondary lining body is infiltrated with maintenance water at a low temperature and the cement particles are fully hydrated in the rising high-temperature and high-humidity steam mist.

3. The tunnel secondary lining maintenance device for use in a construction site with an extreme temperature step difference according to claim 2 is characterized in that: The steam generator (8) and the fogging device (9) are connected to the tunnel secondary lining trolley (1), the maintenance sealing interval assembly and the spraying device (13) in a manner of creating a high temperature and high humidity maintenance environment for the tunnel secondary lining.

4. The tunnel secondary lining maintenance device for use in a construction site with an extreme temperature step difference according to claim 1 is characterized in that: The maintenance sealing interval component is configured to include a sealing strip (5), a sealing film (6) and an arc frame (7). Or, it further comprises a first accessory device and the first accessory device is arranged on the tunnel secondary lining trolley (1), and the first accessory device is arranged as a lifting and telescopic cylinder (2), Or, it further comprises a second accessory device and the second accessory device is arranged in the maintenance sealing interval component, and the second accessory device is arranged as a temperature and humidity sensor (15), Or, further comprising a third accessory device, and the third accessory device is arranged on the tunnel secondary lining trolley (1), the spray device (13), the steam generator (8), the fogging device (9), the first accessory device and the second accessory device, and the third accessory device is arranged as a controller (16), Or, it further comprises a fourth accessory device and the fourth accessory device is arranged in the maintenance sealing interval component, and the fourth accessory device is arranged as a visual monitoring head (18).

5. The tunnel secondary lining maintenance device for use in a construction site with an extreme temperature step difference according to claim 4 is characterized in that: A lifting and telescopic cylinder (2) and an arc frame (7) are respectively arranged on a tunnel secondary lining trolley (1); a sealing strip (5), a temperature and humidity sensor (15) and a visual monitoring head (18) are respectively arranged on the arc frame (7); a sealing film (6) is arranged between the sealing strip (5) and the arc frame (7); a steam generator (8), a fogging device (9) and a spraying device (13) are respectively arranged between the arc frame (7) and the tunnel secondary lining trolley (1); and a controller (16) is arranged between the lifting and telescopic cylinder (2), the steam generator (8), the fogging device (9), the spraying device (13), the temperature and humidity sensor (15), the visual monitoring head (18) and the tunnel secondary lining trolley (1).

6. The tunnel secondary lining maintenance device for use in a construction site with an extreme temperature step difference according to claim 5 is characterized in that: The tunnel secondary lining trolley (1) is provided with a driving motor and a beam end with an ear seat. Tunnel lining Masonry Trolley The driving motor control interface of the tunnel secondary lining trolley (1) is configured to be connected to the controller (16) through a cable, the ear seat on the end of the crossbeam of the tunnel secondary lining trolley (1) is configured to be connected to the arc frame (7) through an intermediate bolt and nut, and the crossbeam on the lower end surface of the tunnel secondary lining trolley (1) is configured to be connected to the lifting and telescopic cylinder (2), the steam generator (8), the fogging device (9), the spraying device (13) and the controller (16), respectively, and the steam generator (8), the fogging device (9), the spraying device (13) and the controller (16) are configured to be arranged and distributed at intervals along the longitudinal center line of the tunnel secondary lining trolley (1), Or, the steam generator (8) is configured as an electric steam generator having a steam nozzle (10), and the transverse input port section of the steam nozzle (10) is configured to be connected to the output port pipeline of the steam generator (8) through a pipeline quick connector, the shell of the steam generator (8) is configured to be connected to the tunnel secondary lining trolley (1), and the control interface of the steam generator (8) is configured to be connected to the controller (16) through a cable, the transverse section of the steam nozzle (10) is configured to be connected to the sealing membrane (6) in a through-type manner, and the longitudinal section of the steam nozzle (10) is configured to be connected to the arc frame (7), Alternatively, the steam nozzle (10) is configured as a T-shaped tubular body having a steam nozzle in the longitudinal portion and a plurality of steam nozzles (10) are arranged on the steam generator (8), Or, the fogging device (9) is configured as an ultrasonic high-frequency fogging machine having a steam fogging nozzle (12), and the input port section of the steam fogging nozzle (12) is configured to be connected to the output port pipeline of the fogging device (9) through a pipeline quick connector, the housing of the fogging device (9) is configured to be connected to the tunnel second lining trolley (1), and the control interface of the fogging device (9) is configured to be connected to the controller (16) through a cable, the steam fogging nozzle (12) is configured to be connected to the sealing film (6) in a through-type manner, and the steam fogging nozzle (12) is configured to be connected to the arc frame (7), Alternatively, the steam mist nozzles (12) located at the lower part of the arc frame (7) and at the middle part of the arc frame (7) are configured as L-shaped tubular bodies, and the steam mist nozzles (12) located at the upper part of the arc frame (7) are configured as Z-shaped tubular bodies, and a plurality of steam mist nozzles (12) are provided on the mist generating device (9). Or, the spray device (13) is configured as a spray system having a spray pipe (14), and the input port section of the spray pipe (14) is configured to be connected to the output port pipeline of the spray device (13) through a pipeline quick connector, the housing of the spray device (13) is configured to be connected to the tunnel secondary lining trolley (1), and the control interface of the spray device (13) is configured to be connected to the controller (16) through a cable, the transverse portion of the spray pipe (14) is configured to be connected to the sealing film (6) in a through-type manner, and the longitudinal portion of the spray pipe (14) is configured to be connected to the arc frame (7), Or, the spray device (13) is configured as a spray system having a box for storing water, an electric heater installed in the box and used to heat water, and a high-pressure pump installed in the box and used to output water, the box of the spray device (13) is configured to be connected to the tunnel secondary lining trolley (1), and the electric heater control interface of the spray device (13) and the high-pressure pump control interface of the spray device (13) are configured to be connected to the controller (16), respectively, the output port pipeline of the high-pressure pump of the spray device (13) is configured to be connected to the spray pipe (14) through a pipeline quick connector, and the spray pipe (14) is configured to have a mesh pipe body having a double H-shaped pipe rack in the longitudinal part and a spray nozzle installed in the double H-shaped pipe rack, Alternatively, the arc frame (7) is configured to include an end plate portion (71), an inner rod portion (72), an outer rod portion (73), a connecting seat portion (74), a dispersion plate portion (75), a support seat portion I (76), a thrust screw portion (77) and a disk portion (78), and the end surface of the inner rod portion (72) is configured to be connected to the inner edge of the inner end surface of the end plate portion (71), and the end surface of the outer rod portion (73) is configured to be connected to the inner end surface of the end plate portion (71). The outer edge of the surface is connected and the peripheral side surface of the inner rod portion (72) is arranged to be connected to the horizontal end surface of the connecting seat portion (74), the peripheral side surface of the outer rod portion (73) is arranged to be connected to the vertical end surface of the dispersion plate portion (75), the end surface of the end plate portion (71) is arranged to be connected to the support seat portion I (76) and the upper end of the thrust screw portion (77) is arranged to be threadedly connected to the support seat portion I (76), and the lower end of the thrust screw portion (77) is arranged to be threadedly connected to the support seat portion I (76). The outer rod (73) is configured to be rotatably connected to the disk portion (78), the peripheral side surface of the end plate portion (71) is configured to be connected to the sealing strip (5), and the inner rod portion (72) and the outer rod portion (73) are configured to be clamped and connected to the sealing film (6), the peripheral side surface of the inner rod portion (72) and the peripheral side surface of the outer rod portion (73) are respectively configured to be bonded and connected to the sealing film (6), and the outer rod portion (73) is respectively configured to be connected to the fogging device (9), the temperature and humidity sensor (15) and the visual monitoring head (18), the outer rod portion (73) located at the lower portion is configured to be connected to the steam generator (8) and the outer rod portion (73) located at the upper portion is configured to be connected to the spraying device (13), the connecting seat portion (74) is configured to be connected to the tunnel secondary lining trolley (1) through intermediate bolts and nuts, and the dispersion plate portion (75) is respectively configured to be distributed correspondingly to the steam generator (8), the fogging device (9) and the spraying device (13), Alternatively, the end plate portion (71) is configured as a C-shaped strip body and the inner rod portion (72) is configured as a rod-shaped body, the outer rod portion (73) is configured as a rod-shaped body having a through hole body and the through hole body of the outer rod portion (73) is configured to be connected to the temperature and humidity sensor (15) and the visual monitoring head (18) through an intermediate bolt and nut, the connecting seat portion (74) is configured as a T-shaped block body having a through hole body in the vertical portion and the dispersing plate portion (75) is configured as an L-shaped seat body having a C-shaped groove body in the horizontal portion, the inner rod portion (72) and the outer rod portion (73) The support seat part I (76) is arranged to be distributed along the contour line of the end plate part (71) at intervals, and the support seat part I (76) is arranged to be a block body with a threaded hole body, the thrust screw part (77) is arranged to be a light column bolt with a through hole body at the upper end and a convex head at the lower end, and the disk part (78) is arranged to be a seat body with a convex blind hole in the middle, the threaded hole body of the support seat part I (76) is arranged to be connected to the thrust screw part (77), and the convex head of the thrust screw part (77) is arranged to be connected to the convex blind hole of the disk part (78), Alternatively, the sealing strip (5) is configured to include a support strip portion (51), a support seat portion II (52) and a cylindrical shell portion (53), and the outer end surface of the support seat portion II (52) is configured to be accommodated and connected to the cylindrical shell portion (53), the support strip portion (51) is arranged between two adjacent support seat portions II (52), and the end surface of the support strip portion (51) is configured to be connected to the end surface of the support seat portion II (52), one of the support seat portions II (52) is arranged at one end of the sealing strip (5) and the other of the support seat portions II (52) is arranged at the sealing strip (5). At the other end of the sealing strip (5), the lower end surface of the support strip portion (51) and the lower end surface of the support seat portion II (52) are respectively arranged to be connected to the arc frame (7), and the upper end surface of the support strip portion (51) and the upper end surface of the support seat portion II (52) are respectively arranged to be contact-connected to the second lining body of the tunnel, the cylindrical shell portion (53) of the support seat portion II (52) located on the end is arranged to be connected to the sealing membrane (6) through an intermediate bolt, and the outer end surface of the support seat portion II (52) located on the end is arranged to be contact-connected to the sealing membrane (6), Or, the support strip portion (51) is configured as a sponge strip and the support seat portion II (52) is configured as a rubber block, the shell portion (53) is configured as a threaded tube and the support seat portion II (52) and the support strip portion (51) are configured to be arranged and distributed at intervals, Alternatively, the sealing membrane (6) is configured to include a membrane portion (61) and a blocking plate portion (62), and the outer edge of the inner end surface of the blocking plate portion (62) is configured to be in contact connection with the lower end of the side surface of the membrane portion (61), the membrane portion (61) is configured to be in covering connection with the arc frame (7), and the upper end of the blocking plate portion (62) is configured to be connected to the sealing strip (5) via an intermediate bolt, and the upper end of the inner end surface of the blocking plate portion (62) is configured to be in contact connection with the sealing strip (5), Alternatively, the membrane portion (61) is configured as a transparent plastic membrane and the membrane portion (61) is configured on the lower end face of the arc frame (7) and has a surplus body (63), the blocking plate portion (62) is configured as a convex sheet body having a through hole body at the upper end and the edge of the surplus body (63) is configured to be contact-connected with the outer end face of the blocking plate portion (62), the through hole body of the blocking plate portion (62) is configured to be connected with the middle bolt located between the blocking plate portion (62) and the sealing strip (5) and the upper portion of the outer end face of the blocking plate portion (62) is configured to be contact-connected with the flange body of the middle bolt located between the blocking plate portion (62) and the sealing strip (5), Alternatively, the lifting and telescopic cylinder (2) is configured as a telescopic electric cylinder and the housing of the lifting and telescopic cylinder (2) is configured to be connected to the tunnel secondary lining trolley (1), and the control interface of the lifting and telescopic cylinder (2) is configured to be connected to the controller (16) via a cable. Or, the temperature and humidity sensor (15) is configured as an Ethernet-type temperature and humidity transmitter, and the housing of the temperature and humidity sensor (15) is configured to be connected to the arc frame (7) via an intermediate bolt and nut, and the output interface of the temperature and humidity sensor (15) is configured to be connected to the controller (16) via a cable, Or, the controller (16) is configured as a PLC controller and the housing of the controller (16) is configured to be connected to the tunnel secondary lining trolley (1) via intermediate bolts and nuts, the input interface of the controller (16) is configured to be connected to the temperature and humidity sensor (15) via cables, and the output interface of the controller (16) is configured to be connected to the tunnel secondary lining trolley (1), the lifting and telescopic cylinder (2), the steam generator (8), the fogging device (9) and the spraying device (13) via cables, respectively. Alternatively, the visual monitoring head (18) is configured as a high-definition monitoring camera and the housing of the visual monitoring head (18) is configured to be connected to the arc frame (7) via intermediate bolts and nuts, and the output interface of the visual monitoring head (18) is configured to be connected to the visual monitor via a cable.

7. The tunnel secondary lining maintenance device for use in a construction site at an extreme temperature step difference according to any one of claims 1 to 6, characterized in that: The tunnel secondary lining trolley (1), the sealing strip (5), the sealing film (6), the arc frame (7), the steam generator (8), the fogging device (9), and the spraying device (13) are arranged in a manner to prepare a composite curing medium body, and the tunnel secondary lining trolley (1), the sealing strip (5), the sealing film (6), the arc frame (7), the steam generator (8), the fogging device (9), and the spraying device (13) are arranged in a manner to prepare a composite curing medium body, and the tunnel secondary lining trolley (1), the sealing strip (5), the sealing film (6), the arc frame (7), the steam generator (8), the fogging device (9), and the spraying device (13) are arranged in a manner to prepare a customized lifting working state, and the tunnel secondary lining trolley ( 1), the sealing strip (5), the sealing film (6), the arc frame (7), the steam generator (8), the fogging device (9) and the spraying device (13) are arranged to be distributed in a manner of controlling the working state, and the tunnel secondary lining trolley (1), the sealing strip (5), the sealing film (6), the arc frame (7), the steam generator (8), the fogging device (9) and the spraying device (13) are arranged to be distributed in a manner of picking up image signals, Alternatively, the center line of the tunnel secondary lining trolley (1), the center line of the sealing strip (5), the center line of the sealing membrane (6) and the center line of the arc frame (7) are arranged on the same straight line, a plurality of lifting and telescopic cylinders (2) are arranged on the tunnel secondary lining trolley (1), two sealing strips (5), a plurality of temperature and humidity sensors (15) and a plurality of visual monitoring heads (18) are respectively arranged on the arc frame (7), the steam spray pipe (10), the steam mist spray pipe (12) and the spray pipe (14) are respectively arranged to be connected to the outer rod part (73), the membrane part (61) is arranged to be connected to the inner rod part (72) and the outer rod part (73), the blocking plate part (62) is arranged to be connected to the support seat part II (52) and the cylinder shell part (53), and the support strip part (51) and the support seat part II (52) are respectively arranged to be connected to the end plate part (71).

8. The tunnel secondary lining maintenance device for use in a construction site with an extreme temperature step difference according to claim 7 is characterized in that: It also includes a curtain cloth and a blower, and the inner end surface of the upper edge body of the curtain cloth is arranged to be in contact connection with the outer end surface of the support strip part (51) and the outer end surface of the support seat part II (52), the upper edge body of the curtain cloth is arranged to be connected to the cylinder shell part (53) through an intermediate bolt, and the blower is arranged on the tunnel foundation surface, one section of the lower edge body of the curtain cloth is arranged to be in contact connection with the air outlet port of the blower, and the air outlet port of the blower is arranged to be distributed corresponding to the tunnel secondary lining trolley (1), Alternatively, the curtain retaining cloth is configured as a heat-insulating cotton door curtain having a through-hole body on the upper edge and the through-hole body of the curtain retaining cloth is configured to be connected to an intermediate bolt between the curtain retaining cloth and the cylinder shell portion (53), the outer end surface of the upper edge body of the curtain retaining cloth is configured to be contact-connected to an intermediate bolt flange body between the curtain retaining cloth and the cylinder shell portion (53), and the blower is configured as a high-pressure hot air blower.

9. A method for maintaining the secondary lining of a tunnel at a construction site with an extreme temperature step difference, characterized in that the steps are: The tunnel secondary lining trolley (1) and the maintenance sealing interval assembly realize the prevention of the maintenance sealing interval on the tunnel secondary lining body, the spray device (13) realizes the treatment of the tunnel secondary lining body in a saturated water state, the steam generator (8) and the fogging device (9) realize the creation of a high-temperature and high-humidity maintenance environment for the tunnel secondary lining body, and realizes the upper infiltration and replenishment of maintenance water for the tunnel secondary lining body under a low-temperature state, and the full hydration treatment of cement particles in the rising high-temperature and high-humidity steam water mist.

10. The tunnel secondary lining maintenance method for a construction site with an extreme temperature step difference according to claim 1 is characterized in that: the steps are: The membrane part (61) is passed through the inner rod part (72) and the outer rod part (73), and a surplus body (63) is left on the lower end surface of the arc frame (7). The housing of the temperature and humidity sensor (15) and the housing of the visual monitoring head (18) are connected to the through hole body of the outer rod part (73) through the intermediate bolts and nuts, so that the membrane part (61), the temperature and humidity sensor (15) and the visual monitoring head (18) are installed on the arc frame (7). When it is necessary to maintain the second lining body of the tunnel, the controller (16) is put into working state, and the torque rod is installed in the through hole body of the thrust screw part (77). The thrust screw part (77) is rotated in the threaded hole body of the support seat part I (76), so that the disk part (78) moves downward, so that the disk part (78) acts on the tunnel. On the foundation surface of the tunnel, the convex head of the thrust screw part (77) rotates in the convex blind hole of the disk part (78), so that the end plate part (71) moves upward, so that the arc frame (7) is in a high position, so that the tunnel secondary lining trolley (1) is in a driving state, and the tunnel secondary lining trolley (1) is driven into the arc frame (7), so that the tunnel secondary lining trolley (1) is in a non-driving state, and the thrust screw part (77) rotates in the opposite direction in the threaded hole body of the support seat part I (76), so that the end plate part (71) moves downward, so that the connecting seat part (74) is aligned with the ear seat on the end of the cross beam of the tunnel secondary lining trolley (1), and the intermediate bolt and nut are installed between the connecting seat part (74) and the ear seat on the end of the cross beam of the tunnel secondary lining trolley (1). Thus, the arc frame (7) is installed on the tunnel secondary lining trolley (1), and then the thrust screw part (77) is continuously rotated in the threaded hole of the support seat part I (76) in the opposite direction, so that the disc part (78) is separated from the tunnel foundation surface, so that the tunnel secondary lining trolley (1) is in a running state, the arc frame (7) is located at the tunnel secondary lining body position that needs to be maintained, the tunnel secondary lining trolley (1) is in a running state, the lifting and telescopic cylinder (2) is in an extended state, the tunnel secondary lining trolley (1) moves upward, and the tunnel secondary lining trolley (1) is in a high position state, the upper end surface of the support strip part (51) and the upper end surface of the support seat part II (52) act on the tunnel secondary lining body respectively, and the blocking plate part (62) is placed on the support seat part located at the end. Ⅱ (52), placing the middle bolt in the through hole of the blocking plate (62), allowing the middle bolt to rotate in the cylindrical shell (53) of the support seat Ⅱ (52) located on the end head, so that the flange body of the middle bolt acts on the upper part of the outer end surface of the blocking plate (62), installing the blocking plate (62) on the support seat Ⅱ (52) located on the end head, placing the edge of the excess body (63) on the outer end surface of the blocking plate (62), and forming a maintenance sealing zone on the second lining body of the tunnel by the support strip part (51), the support seat Ⅱ (52), the membrane part (61), the blocking plate (62) and the excess body (63), and connecting the horizontal input port section of the steam nozzle (10) to the pipeline quick connector located on the steam generator (8),The input port section of the steam mist nozzle (12) is connected to the pipe quick connector on the fogging device (9), and the input port section of the spray pipe (14) is connected to the pipe quick connector on the spraying device (13), so that the steam generator (8), the fogging device (9) and the spraying device (13) are in working state, and the steam nozzle of the steam nozzle (10) sprays high-temperature water vapor to the lower part of the maintenance sealing section on the second lining of the tunnel, and the steam mist nozzle (12) sprays normal-temperature water mist to the entire area of ​​the maintenance sealing section on the second lining of the tunnel, and the spray water nozzle of the spray pipe (14) sprays water to the upper part of the second lining of the tunnel, and the second lining of the tunnel is maintained by spraying water, high-temperature water vapor and normal-temperature water mist, and the temperature and humidity sensor (15) picks up the temperature and humidity signal in the maintenance sealing section on the second lining of the tunnel, and the visual monitoring head (18) picks up the image signal in the maintenance sealing section on the second lining of the tunnel. After the maintenance of the second lining of the tunnel is completed, the thrust screw part (77) is rotated in the threaded hole of the support seat part I (76), so that the disc part (78) acts on the tunnel foundation surface, and the transverse input port section of the steam nozzle (10) is separated from the pipe quick connector on the steam generator (8), the input port section of the steam mist nozzle (12) is separated from the pipe quick connector on the mist making device (9), the input port section of the spray pipe (14) is separated from the pipe quick connector on the spray device (13), and the pipe quick connector installed on the connection seat is separated. (74) and the middle bolts and nuts between the ears and seats on the end of the cross beam of the tunnel secondary lining trolley (1) are removed, so that the lifting and telescopic cylinder (2) is in a retracted state, the tunnel secondary lining trolley (1) is in a low position, and the tunnel secondary lining trolley (1) is in a driving state, and the tunnel secondary lining trolley (1) is driven out of the arc frame (7), and the support strip part (51), the support seat part II (52), the membrane part (61), the blocking plate part (62) and the surplus body (63) form a maintenance sealing area on the tunnel secondary lining body to perform maintenance environment delay treatment on the tunnel secondary lining body, Alternatively, firstly, the spray nozzle of the spray pipe (14) sprays 28°C-32°C water on the upper part of the second lining of the tunnel to wet the second lining of the tunnel as a whole. After the second lining of the tunnel is wetted as a whole, the steam nozzle of the steam spray pipe (10) sprays 40°C-45°C high-temperature steam on the lower part of the maintenance sealing section on the second lining of the tunnel. The steam mist spray pipe (12) sprays normal-temperature water mist on the entire maintenance sealing section on the second lining of the tunnel. The rising 40°C- High-temperature water vapor at 45°C is mixed with water mist at normal temperature in all directions to obtain a curing intermediate medium at 25°C-35°C. A curing environment is balanced in a curing sealing zone formed by a support strip portion (51), a support seat portion II (52), a membrane portion (61), a blocking plate portion (62) and a surplus body (63) on the second lining body of the tunnel. The controller (16) controls the working states of the steam generator (8), the fogging device (9) and the spraying device (13) using the temperature and humidity signals picked up by the temperature and humidity sensor (15) as reference signals. Or, the steps are: The inner end surface of the upper edge body of the curtain cloth is placed on the outer end surface of the support strip part (51) and the outer end surface of the support seat part II (52), and the middle bolt is placed in the through hole body of the curtain cloth, so that the middle bolt rotates in the shell part (53) so that the flange body of the middle bolt acts on the outer end surface of the upper edge body of the curtain cloth, thereby installing the curtain cloth on the sealing strip (5), and obtaining an improved environmental sealing zone in the tunnel secondary lining trolley (1) by the membrane part (61) and the curtain cloth, and placing the blower on the tunnel foundation surface, and placing the air outlet of the blower corresponding to the improved environmental sealing zone, and placing one section of the lower edge body of the curtain cloth on the air outlet port of the blower, so that the blower is in a working state, and the blower injects hot air into the improved environmental sealing zone, so that the improved environmental sealing zone is in a high pressure and high temperature state.

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