Permanent and temporary combined pipe gallery pipe jacking open caisson supporting construction method based on high-pressure protection

Abstract

The invention discloses a permanent and temporary combined type pipe gallery pipe jacking open caisson supporting construction method based on high-pressure protection, and relates to the technical field of building engineering construction. The method comprises the following steps that S1, a waterproof curtain is constructed in combination with the field air limiting requirement; s2, the pipe-jacking working well and the pipe-jacking receiving well are constructed and sunk in a segmented mode, and the sinking vertical condition of the sinking well is detected through a sinking well vertical monitoring device 1; s3, construction of a water stop pile at a pipe jacking hole; s4, a jacking system is installed, jacking construction measurement is completed, and the jacking pipe is jacked section by section; s5, the pipe gallery foundation pit is excavated to the first support, and a supporting mode is selected for supporting; and S6, the pipe gallery foundation pit is excavated to the elevation of the pipe gallery base. The construction method has the effect of improving the construction efficiency of pipe jacking of the pipe gallery.

Description

Technical Field

[0001] The present application relates to the technical field of building engineering construction, and in particular to a permanent and temporary combined pipe gallery caisson support construction method based on high-pressure protection. Background Art

[0002] With the rapid economic development, the utilization of ground space has gradually become saturated. As a new building structure, the underground integrated pipeline corridor effectively manages the pipelines of electricity, gas, sewage, heat, etc., which greatly saves the pipeline space and increases the utilization rate of underground space. It isolates the pipeline from harmful substances in the soil and greatly reduces the risk of rework and repair in the later stage.

[0003] As multiple types of pipelines need to be coordinated in underground pipe corridors and some pipelines are buried deep, the excavation of underground pipe corridors often uses steel sheet piles or SMW piles as the foundation pit support form. After the support is completed, excavation work is carried out, which requires a higher construction clearance, which has disadvantages under high-voltage lines or in working environments with limited height requirements.

[0004] And because the pipeline is buried deep, deep foundation pit operations are required to ensure the smooth passage of the pipeline. The potential safety hazard of the workers is a major problem in the construction. At the same time, when there is a height limit requirement, the mechanical operating height of the long-arm excavator and other machinery required for the construction cannot meet the requirement. Therefore, it is necessary to adopt the jacking construction method. However, the accompanying problem is that the jacking working shaft and the receiving shaft are temporary support structures. After the construction is completed, they need to be broken and the pipeline backfilled before the pipeline corridor construction process can be carried out, which greatly increases the construction period compared to normal construction. Therefore, this application proposes a new technical solution. Summary of the invention

[0005] In order to improve the construction efficiency of pipeline gallery top pipes, the present application provides a permanent and temporary combined pipeline gallery top pipe caisson support construction method based on high pressure protection.

[0006] The present application provides a permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection, which adopts the following technical solutions:

[0007] A permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection, characterized in that it includes the following steps:

[0008] S1. Carry out the construction of water-stop curtain in accordance with the space restriction requirements on site;

[0009] S2. The jacking working well and the jacking receiving well are constructed and sunk in sections, and the verticality of the caisson sinking is detected by using the caisson vertical monitoring device;

[0010] S3, construction of water stop piles at the top pipe opening;

[0011] S4, jacking system installation, jacking construction measurement completion, jacking pipe section by section;

[0012] S5. Excavate the foundation pit of the pipe gallery to the first support and select the support form for support;

[0013] S6. Excavate the tunnel foundation pit to the tunnel base elevation.

[0014] Optionally, the caisson vertical monitoring device includes a control box, a connecting block, a lifting mechanism, a fixing mechanism and a laser ranging sensor, wherein the fixing mechanism is arranged on one side of the control box and is used to fix the control box on the inner wall of the caisson, the connecting block is located below the control box, the laser ranging sensor is arranged on the upper surface of the connecting block, and the detection end of the laser ranging sensor is arranged horizontally, the interior of the control box is hollow, the lifting mechanism is arranged in the inner cavity of the control box, the lifting part of the lifting mechanism is connected to the connecting block and is used to lift the connecting block, a contact sensor is fixedly connected to the bottom of the connecting block and is used to monitor whether the bottom of the connecting block contacts the bottom of the well, and a controller is arranged in the control box, and the controller is electrically connected to the lifting mechanism, the laser ranging sensor and the contact sensor;

[0015] Wherein, the controller is configured as follows:

[0016] If a detection command for the verticality of the caisson is received, the current time is defined as time T1, the detection value a1 fed back by the laser ranging sensor at time T1 is obtained, and the lifting mechanism is controlled to descend;

[0017] If the signal fed back by the contact sensor indicates that the bottom of the well has been touched, the lifting mechanism is controlled to stop responding and an alarm is output, and the current time is defined as time T2, and the detection value a2 fed back by the laser ranging sensor at time T2 is obtained;

[0018] The detection value a1 is compared with the detection value a2. If the comparison result exceeds the preset qualified range, a preset skew prompt is output.

[0019] Optionally, the fixing mechanism includes a connecting seat, a slide, a fixing rod and a fixing seat, the connecting seat is vertically arranged, one end of the fixing seat is fixedly connected to the upper end of the connecting seat, and the fixing seat is horizontally arranged, a sliding groove is provided on the lower surface of the fixing seat along its length, one end of the slide is slidably connected to the sliding groove, and an adjustment component for adjusting the distance between the connecting seat and the slide is provided on the side wall of the connecting seat facing the slide, the side wall of the connecting seat abuts against the inner wall of the caisson, and the side wall of the slide facing the connecting seat abuts against the outer wall of the caisson, the adjustment component is located below the fixed seat, one end of the fixing rod is fixedly penetrated in the adjustment component, and the other end of the fixing rod is fixedly connected to the slide, and the control box is fixedly connected to the side wall of the connecting seat away from the slide.

[0020] Optionally, the adjusting assembly includes a support block, a sliding block, a limit block and a limit spring, the support block is fixedly connected to the side wall of the connecting seat facing the slide, and the support block is horizontally arranged, the interior of the support block is hollow and open toward the slide, the sliding block is slidably connected to the inner cavity of the support block, the side wall of the sliding block is provided with a groove, the limit spring is arranged in the groove, one end of the limit spring is fixedly connected to the bottom of the groove, and the other end of the limit spring is fixedly connected to the limit block, the side wall of the support block on one side of the groove is provided with a plurality of limit holes along its length direction, the end of the limit block facing away from the limit spring extends out of the groove and slides through the limit hole, and one end of the fixing rod is fixedly passed through the sliding block.

[0021] Optionally, the end of the limit block away from the limit spring is spherical.

[0022] Optionally, the lifting mechanism includes a driving motor, a roller, a rotating shaft and a traction rope, the driving motor is arranged on the inner wall of the control box, and the output shaft of the driving motor is arranged horizontally, one end of the rotating shaft is coaxially fixed to the output shaft of the driving motor, and the other end of the rotating shaft is connected to the inner cavity of the control box, the roller is fixedly sleeved on the rotating shaft, one end of the traction rope is fixedly connected to the cylinder body of the roller, and the traction rope is wound around the cylinder body of the roller, a through groove is penetrated through the bottom of the control box for the traction rope to slide through, the other end of the traction rope is extended vertically downward toward the through groove, and the upper end of the connecting block is fixedly connected to the traction rope.

[0023] Optionally, a embedding groove is provided on the lower surface of the connection block, the contact sensor is fixedly connected in the embedding groove, and the detection end of the contact sensor is arranged vertically downward.

[0024] Optionally, the interior of the connection block is hollow, and a tilt sensor for detecting the tilt of the connection block is disposed in the inner cavity of the connection block, and the tilt sensor is electrically connected to the controller, and the controller is configured as follows:

[0025] Obtain the detection value fed back by the inclination sensor and determine whether it meets the preset connection block inclination condition. If so, analyze the cause of the inclination;

[0026] If the analysis result is that the well wall is tilted, the detection value fed back by the tilt sensor within the preset interval time T3 is obtained and recorded, and defined as the detection value b1 and the detection value b2 respectively;

[0027] Compare the detection value b1 with the detection value b2, and if the comparison result is within the preset difference range, output the detection value b2;

[0028] If the analysis result shows that the well bottom is uneven, the detection value a3 of the laser ranging sensor feedback before the connection block tilt condition is met is output.

[0029] Optionally, the control box is provided with an opening along its width direction, guide rails are provided at the openings on the side walls on both sides of the control box along its length direction, sliding plates are provided on the side walls on both sides of the control box, and the sliding plates are slidingly connected to the opening of the control box through the guide rails, the drive motor is fixedly connected to the inner wall of the sliding plate on one side, and the end of the rotating shaft facing away from the drive motor is rotatably connected to the inner wall of the sliding plate on the other side of the control box.

[0030] Optionally, the side walls on both sides of the limit block are respectively provided with limit grooves along their length direction, and the limit grooves are opened toward the side of the limit block away from the limit spring. Two limit plates are fixedly connected to the opening of the grooves, and the two limit plates are respectively slidably connected to the limit grooves on both sides of the limit block, and the side walls of the two limit plates facing the bottom of the grooves are respectively abutted against the side edges of the limit grooves on both sides.

[0031] To summarize, the present application includes the following beneficial technical effects: the present application organically combines caisson construction with pipe gallery support in a permanent and temporary combination manner, and uses the caisson working well and receiving well structure as the support structure of the foundation pit to avoid damage to high-voltage wires by large machinery. At the same time, it can closely connect the pipeline construction with the pipe gallery structure construction process, greatly improving the construction efficiency of the pipe gallery top pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a top view of the sinking of the caisson and the jacking of the jacking pipe in the embodiment of the present application;

[0033] Figure 2 It is a front view of the sinking of the caisson and the jacking of the jacking pipe in the embodiment of the present application;

[0034] Figure 3 It is a right side view of the sinking of the caisson and the jacking of the pipe in the embodiment of the present application;

[0035] Figure 4 It is a schematic diagram of the structure of the caisson vertical detection device and the caisson installation in an embodiment of the present application;

[0036] Figure 5 It is a schematic diagram of the overall structure of the caisson vertical detection device of an embodiment of the present application;

[0037] Figure 6 is a structural schematic diagram of the lifting mechanism of an embodiment of the present application;

[0038] Figure 7 is a structural schematic diagram of a fixing mechanism of an embodiment of the present application;

[0039] Figure 8 is a schematic diagram of the structure of the adjustment component of an embodiment of the present application;

[0040] Fig. 9It is a partial cross-sectional view of the connection block of an embodiment of the present application.

[0041] Explanation of the accompanying drawings: 1. Caisson vertical monitoring device; 2. Control box; 21. Sliding plate; 3. Connecting block; 31. Laser ranging sensor; 32. Contact sensor; 33. Tilt sensor; 4. Lifting mechanism; 41. Driving motor; 42. Roller; 43. Rotating shaft; 44. Traction rope; 5. Fixing mechanism; 51. Connecting seat; 52. Slide; 53. Fixing rod; 54. Fixing seat; 55. Sliding groove; 56. Adjusting assembly; 561. Support block; 562. Sliding block; 563. Limiting block; 564. Limiting spring; 565. Limiting hole; 566. Limiting plate. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-9 This application is described in further detail.

[0043] The embodiment of the present application discloses a permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection.

[0044] Reference Figure 1 , Figure 2 as well as Figure 3 The construction method of permanent and temporary combined pipe gallery jacking caisson support based on high-pressure protection includes the following steps: S1, construction of water-stop curtain in combination with the space restriction requirements on site; S2, section-by-section construction and sinking of the jacking working well and the jacking receiving well, and use of the caisson vertical monitoring device 1 to detect the vertical situation of the caisson sinking; S3, construction of water-stop piles at the jacking hole; S4, installation of the jacking system, completion of jacking construction measurement, and jacking of the jacking sections; S5, excavation of the pipe gallery foundation pit to the first support, and selection of support form for support; S6, excavation of the pipe gallery foundation pit to the elevation of the pipe gallery base.

[0045] In step S2, the specific process of section construction and sinking of the jacking working well and the receiving well is as follows:

[0046] 1) Excavation of foundation pit to the lifting and sinking elevation; 2) Construction of caisson blade feet and blade frames; 3) Production of the first section of caisson; 4) Sinking of the first section of caisson and detection of verticality through caisson vertical monitoring device 1; 5) Construction, sinking and detection of verticality of caisson section by section; 6) Pouring of bottom concrete.

[0047] It should be noted that the foundation pit can only be excavated after the water-stop curtain reaches the strength required for on-site construction.

[0048] In step S4, the specific construction process of pipe jacking is as follows:

[0049] 1) Installation of the base, jacking backrest and frame; 2) Hoisting and lowering the jacking machine into the well; 3) Installation of the jacking system; 4) Measurement of jacking construction; 5) Starting jacking into the hole; 6) Jacking in sections; 7) Jacking out of the hole; 8) Closing the hole and replacing the mud; 9) Backfilling.

[0050] Among them, the jacking construction measurement is achieved by burying ground guide points near the two end wells during the construction process, using empty guide points and ground guide points to measure the plane control results to the construction site in a guide way, and using empty guide points and ground guide points to establish a plane control network. The guide measurement uses a total station.

[0051] In step S5, the completed caisson structure is used as the main support structure on one side, and direct slope excavation or steel sheet piles can be selected as the support form on the other side according to construction requirements.

[0052] The two forms of caisson support and slope excavation are combined as the support form of the pipe gallery. The specific construction process is as follows:

[0053] 1) Construction site enclosure, surrounding evacuation roads and access roads, site leveling and pipeline relocation; 2) Construction of reinforced soil and water-stop curtain in the corridor pit; 3) Construction of caisson working well and receiving well, and jacking of jacking pipes; 4) Slope excavation to the lower elevation of the corridor foundation pit; 5) Complete the pouring of the entire corridor main structure, backfill sand to 0.5m above the corridor top surface, and continue to backfill plain fill to the roadbed bottom surface elevation.

[0054] The steel sheet pile support and caisson support are combined as the corridor support form, and the construction process is as follows:

[0055] 1) Construction of fencing, surrounding evacuation roads and access roads, site leveling and pipeline relocation; 2) Construction of surrounding soil, steel sheet piles and water-stop curtains in the corridor pit; 3) Construction of caisson working well and receiving well, and jacking of jacking pipes: 4) Excavation to 0.5m below the first support and construction of the first support; 5) Excavation to 0.5m below the second support and construction of the second support; 6) Backfill to the bottom of the corridor cushion layer, construction of the corridor cushion layer and structural bottom plate; 7) After the concrete force transfer belt and structural bottom plate reach the design strength requirements, remove the second support; 8) Complete the pouring of the entire corridor body and remove the first support.

[0056] Through the above settings, the caisson construction and the pipe gallery support are organically combined in a permanent and temporary combination manner, and the caisson working shaft and receiving shaft structure are used as the support structure of the foundation pit to avoid damage to the high-voltage wires by large machinery. At the same time, it can be closely connected with the pipe gallery structure construction process, effectively ensuring the safety and efficiency of the construction.

[0057] In another embodiment of the present application, referring to Figure 4 , Figure 5 as well as Figure 6 , wherein the caisson vertical monitoring device 1 includes a control box 2, a connecting block 3, a lifting mechanism 4, a fixing mechanism 5 and a laser ranging sensor 31, the fixing mechanism 5 is connected to the side wall of the caisson, the control box 2 is connected to the fixing mechanism 5, and the control box 2 is located in the inner cavity of the caisson, the connecting block 3 is arranged below the control box 2, the laser ranging sensor 31 is fixedly connected to the upper surface of the connecting block 3 by bolts, and the detection end of the laser ranging sensor 31 is arranged horizontally, the interior of the control box 2 is hollow, the lifting mechanism 4 is arranged in the inner cavity of the control box 2, and the lifting part of the lifting mechanism 4 is connected to the connecting block 3, and the lifting of the connecting block 3 is realized by the lifting mechanism 4. A contact sensor 32 for monitoring whether the connecting block 3 contacts the bottom of the well is arranged at the bottom of the connecting block 3, and a controller is also installed in the control box 2, and the controller can be a PLC controller, and the controller is electrically connected to the lifting mechanism 4, the laser ranging sensor 31 and the contact sensor 32;

[0058] Among them, the controller configuration is:

[0059] 1) If a detection instruction for the verticality of the caisson is received, the current time is defined as time T1, the detection value a1 fed back by the laser ranging sensor at time T1 is obtained, and the lifting mechanism 4 is controlled to descend;

[0060] It can be understood that the caisson verticality detection instruction refers to the staff pressing the start button prefabricated on the control box 2.

[0061] 2) If the signal fed back by the contact sensor 32 indicates that the bottom of the well has been touched, the lifting mechanism 4 is controlled to stop responding and output an alarm prompt, and the current time is defined as time T2, and the detection value a2 fed back by the laser ranging sensor 31 at time T2 is obtained;

[0062] It is understandable that the alarm prompt may be a flashing signal light preset by the controller and an alarm sound.

[0063] 3) Compare the detection value a1 with the detection value a2. If the comparison result exceeds the preset qualified range, a preset skew prompt is output.

[0064] It is understandable that the preset qualified range is set by the staff according to different on-site construction requirements; the preset skew prompt can be the flashing of the preset skew indicator light on the controller.

[0065] Through the above arrangement, the control box 2 is fixedly connected to the inner cavity of the caisson through the fixing mechanism 5, the detection end of the laser ranging sensor 31 is horizontally arranged and points to the inner wall of the caisson, and a display screen is arranged on the upper surface of the control box 2 for displaying the detection value fed back by the laser ranging sensor 31, so as to facilitate observation by the staff. When the staff presses the start button prefabricated on the control box 2, the moment when the start button is pressed is defined as moment T1, and the detection value a1 fed back by the laser ranging sensor 31 at moment T1 is obtained, and the lifting mechanism 4 drives the connecting block 3 to descend. When the signal fed back by the contact sensor 32 at the bottom of the connecting block 3 shows contact with the ground, the lifting mechanism 4 stops responding and outputs a preset alarm prompt so that the staff can handle it in time. At the same time, the current moment is defined as moment T2, and the detection value a2 fed back by the laser sensor 31 at moment T2 is obtained. The controller compares a1 and a2, and determines whether the comparison result exceeds the preset qualified range. If it exceeds the preset qualified range, a skew prompt is output. If the comparison result meets the preset qualified range, the detection values ​​a1 and a2 are displayed on the display screen to inform the staff of the detection result, thereby realizing the judgment of the verticality of the caisson.

[0066] Reference Figure 7 The fixing mechanism 5 includes a connecting seat 51, a slide 52, a fixing rod 53 and a fixing seat 54. The connecting seat 51 is vertically arranged. One end of the fixing seat 54 is fixedly connected to the upper surface of the connecting seat 51 by a bolt, and the fixing seat 54 is horizontally arranged. A sliding groove 55 is penetrated through the lower surface of the fixing seat 54 along its length direction. The cross section of the sliding groove 55 is T-shaped. One end of the slide 52 is fixedly connected to an extension block by bolts. The cross section of the extension block is T-shaped, and the extension block is slidably connected in the sliding groove 55.

[0067] An adjusting component 56 for adjusting the distance between the connecting seat 51 and the slide 52 is provided on the side wall of the connecting seat 51 facing the slide 52. The adjusting component 56 is located below the fixed seat 54. One end of the fixing rod 53 is fixedly penetrated through the adjusting component 56, and the other end of the fixing rod 53 is fixedly connected to the slide 52. The control box 2 is fixedly connected to the side wall of the connecting seat 51 away from the slide 52 by bolts. The side wall of the connecting seat 51 abuts against the inner wall of the caisson, and the side wall of the slide 52 abuts against the outer wall of the caisson. It should be noted that the height of the slide 52 is higher than the height set by the adjusting component 56, so that the side wall of the caisson can be clamped between the connecting seat 51 and the slide 52 through the adjusting component 56, and the control box 2 can be fixed to the inner cavity of the caisson.

[0068] Through the above-mentioned arrangement, the adjusting component 56 abuts against the upper end of the side wall of the caisson, the connecting seat 51 extends into the inner cavity of the caisson, and the side wall of the connecting seat 51 abuts against the inner wall of the caisson. The distance between the slide 52 and the connecting seat 51 is adjusted by the adjusting component 56, so that the slide 52 and the connecting seat 51 clamp the side wall of the caisson to fix the control box 2. Since the distance between the slide 52 and the connecting seat 51 can be adjusted by moving the slide 52, the fixing mechanism 5 can adapt to different caissons, thereby improving the applicability of the caisson vertical monitoring device 1.

[0069] Reference Figure 7 and Figure 8 In another embodiment of the present application, in order to facilitate the sliding table 52 and the connecting seat 51 to clamp the side wall of the caisson, the side wall of the sliding table 52 can be pressed against the side wall of the caisson, the adjusting assembly 56 includes a support block 561, a sliding block 562, a limit block 563 and a limit spring 564, the support block 561 is fixedly connected to the side wall of the connecting seat 51 facing the sliding table 52 by bolts, and the support block 561 is horizontally arranged, the interior of the support block 561 is hollow and is opened toward the sliding table 52, and the sliding block 562 is fixedly connected to the side wall of the connecting seat 51 facing the sliding table 52 by bolts. Block 562 is slidably connected to the inner cavity of the support block 561, a groove is provided on the side wall of the sliding block 562, a limit spring 564 is arranged in the groove, one end of the limit spring 564 is fixedly connected to the bottom of the groove, and the other end of the limit spring 564 is fixedly connected to the limit block 563, and a plurality of limit holes 565 are provided on the side wall of the support block 561 located on one side of the groove along its length direction, and one end of the limit block 563 away from the limit spring 564 extends out of the limit groove and slides through the limit hole 565.

[0070] Through the above-mentioned arrangement, when fixing the device on the side wall of the caisson, the side wall of the connecting seat 51 is abutted against the inner wall of the caisson, and by pressing the limit block 563, the limit block 563 is extended into the groove, and the sliding block 562 is slid toward the support block 561, driving the side wall of the slide to abut against the outer wall of the caisson, so as to fix the control box 2 in the inner cavity of the caisson.

[0071] Reference Figure 8 In order to facilitate pressing the limit block 563 to make the sliding block 562 slide, the end of the limit block 563 away from the limit spring 564 is set to be spherical.

[0072] Reference Figure 6 and Fig. 9 The lifting mechanism 4 includes a driving motor 41, a roller 42, a rotating shaft 43 and a traction rope 44. The driving motor 41 is arranged in the inner cavity of the control box 2, and the output shaft of the driving motor 41 is arranged horizontally. The output shaft of the driving motor 41 is equipped with a coupling. The rotating shaft 43 is coaxially fixedly connected to the output shaft of the driving motor 41 through the coupling. The other end of the rotating shaft 43 is rotatably connected to the inner cavity of the control box 2. The roller 42 is fixedly sleeved on the rotating shaft 43. The output shaft of the driving motor 41 rotates to drive the roller 42 to rotate.

[0073] A clamp is fixedly connected to the body of the drum 42 by bolts, and one end of the traction rope 44 is fixedly connected to the body of the drum 42 by the clamp. The traction rope 44 is a tool commonly used in construction sites in the prior art for lifting, pulling and fixing structures. The traction rope 44 in this embodiment has the characteristics of high strength, wear resistance and deformation, and can adapt to larger pulling force.

[0074] The rope body of the traction rope 44 is connected to the cylinder body of the drum 42 by winding. A through groove is penetrated through the bottom of the control box 2 for the traction rope 44 to slide through. The other end of the traction rope 44 extends out of the through groove and extends vertically downward. The upper end of the connecting block 3 is fixedly connected to one end of the traction rope 44 extending out of the through groove.

[0075] Through the above arrangement, the output shaft of the driving motor 41 drives the drum 42 to rotate, so that the traction rope 44 bound to the cylinder body of the drum 42 gradually separates from the drum, thereby realizing the lifting and lowering of the connecting block 3 at the lower end of the traction rope 44.

[0076] Reference Fig. 9 A groove is provided on the lower surface of the connecting block 3, and the contact sensor 32 is fixedly connected in the groove, and the detection end of the contact sensor 32 is arranged vertically downward, so that when the connecting block 3 descends, the contact sensor 32 can detect the contact with the ground in time.

[0077] Reference Fig. 9 In another embodiment of the present application, considering that the ground soil is uneven, when the connecting block 3 contacts the uneven ground, the detection end of the laser ranging sensor 31 is offset, resulting in a deviation between the detection value at time T2 and the detection value at time T1, and a misjudgment occurs. At the same time, when the caisson is offset, the caisson vertical monitoring device 1 is installed on the side wall of the offset side of the caisson. During the descent of the connecting block 3, the bottom surface of the connecting block 3 will abut against the inner wall of the caisson, resulting in the inability of the contact sensor 32 to provide feedback, affecting the judgment of the descent of the connecting block 3. The interior of the connecting block 3 is hollow, and a tilt sensor 33 for detecting the tilt of the connecting block 3 is provided in the inner cavity of the connecting block 3. An opening is provided on one side of the connecting block 3 to facilitate the installation of the tilt sensor 33, and a detachable protective cover is installed at the opening.

[0078] The inclination sensor 33 is electrically connected to the controller and the controller is configured as follows:

[0079] Obtain the detection value fed back by the tilt sensor 33, and determine whether it meets the preset connection block tilt condition. If so, analyze the cause of the tilt;

[0080] It can be understood that the preset connection block tilt condition refers to the deviation between the detection value fed back by the inclination sensor 33 and the preset initial value. The preset initial value is the detection value of the inclination sensor 33 of the connection block 3 at a certain angle. In this embodiment, the preset initial value can be the detection value fed back by the inclination sensor 33 when the connection block 3 is in a horizontal state; the analysis of the cause of the tilt refers to the judgment through the contact signal fed back by the contact sensor 32. If the detection signal fed back by the contact sensor 32 shows that the connection block 3 contacts the bottom of the caisson, the analysis result is that the well wall is tilted, otherwise, the analysis result is that the bottom of the well is uneven.

[0081] If the analysis result is that the well wall is tilted, the detection value fed back by the tilt sensor 33 within the preset interval time T3 is obtained and recorded, and is defined as the detection value b1 and the detection value b2 respectively;

[0082] It is understandable that the preset interval time T3 refers to the interval time between two adjacent detection values ​​fed back by the tilt sensor 33 , and can be set by the staff according to the needs of on-site operations. In this embodiment, the interval time T3 can be set to 10s.

[0083] Compare the detection value b1 with the detection value b2, and if the comparison result is within the preset difference range, output the detection value b2;

[0084] It is understandable that the preset difference range is an angle value and can be set by the staff according to the on-site construction conditions.

[0085] If the analysis result shows that the well bottom is uneven, the detection value a3 fed back by the laser distance measuring sensor 31 before the tilt condition of the connecting block 3 is met is output.

[0086] Through the above settings, when the detection value fed back by the inclination sensor 33 deviates from the preset initial value, it means that the connection block 3 is tilted, and the cause of the tilt is analyzed by the detection signal fed back by the contact sensor 32. If the detection signal fed back by the contact sensor 32 shows that contact occurs, the analysis result is that the bottom of the well is uneven. At this time, by comparing the detection values ​​a1 and a3 fed back by the laser ranging sensor 31 at time T1, and by comparing whether the comparison result exceeds the preset qualified range, it is judged whether the caisson is vertical to the ground, thereby eliminating the judgment of the verticality of the caisson caused by the uneven ground of the caisson;

[0087] At the same time, if the contact sensor 32 does not detect a contact signal, it means that the connecting block 3 contacts the side wall of the caisson and tilts, that is, the caisson tilts. At this time, the lifting mechanism 4 continues to descend. Since the end of the connecting block 3 facing the connecting seat 51 abuts against the inner wall of the caisson, the connecting block 3 tilts toward the side of the connecting seat 51 during the descent process. Until the comparison result of the detection value b1 and b2 fed back by the inclination sensor 33 within the interval T3 meets the preset difference range, the lifting mechanism 4 stops running, flashes the preset signal light and sounds an alarm to remind the staff, and inputs the detection value fed back by the inclination sensor 33 into the display. Since the bottom surface of the connecting block 3 is close to the inner wall of the caisson at this time, the detection value fed back by the inclination sensor 33 is close to the inclination of the caisson, and the detection value fed back by the inclination sensor 33 can be used as a reference for the staff to adjust the verticality of the caisson.

[0088] Reference Figure 6 and Fig. 9 When the connecting block 3 sinks close to the inner wall of the caisson, it is convenient to check the vertical condition of the caisson. At the same time, considering that the fixing mechanism 5 is fixed by clamping the side wall of the caisson through the connecting seat 51 and the slide 52 during installation, a certain space needs to be reserved between the connecting block 3 and the inner wall of the caisson to prevent the connecting block 3 from colliding with the inner wall of the caisson due to the shaking caused by the installation of the fixing mechanism 5. The control box 2 is provided with a through opening along its width direction, and guide rails are provided at the through openings on both side walls of the control box 2 along its length direction, and sliding plates 21 are respectively installed at the through openings on both sides of the control box 2, and the sliding plates 21 are constrained by the guide rails so that the sliding plates 21 can be slidably connected to the control box 2, and a fixing frame is installed on the inner wall of one side of the sliding plate 21, and a driving motor 41 is mounted on the fixing frame and fixed by bolts, and the output shaft of the driving motor 41 is horizontally extended toward the other side of the sliding plate 21, and a bearing seat is installed on the inner wall of the other side of the sliding plate 21, and the end of the rotating shaft 43 away from the driving motor 41 is rotatably connected to the control box 2 through the bearing seat. In order to facilitate the movement of the lifting mechanism 4 in the control box, a handle is installed on the side wall of the sliding plate 21 by bolts.

[0089] Through the above arrangement, when the control box 2 is installed on the inner wall of the caisson through the fixing mechanism 5, the sliding plate 21 is slid by the handle to make the lifting mechanism 4 slide as a whole in the direction away from the side of the connecting seat 51, and the distance between the connecting block 3 and the connecting seat 51 is increased, and a certain space is reserved for the connecting block 3 and the inner wall of the caisson, which is convenient for the installation and fixation of the fixing mechanism 5. After the fixing mechanism 5 is fixed, the distance between the connecting block 3 and the inner wall of the caisson on the side of the connecting seat 51 can be adjusted by sliding the sliding plate 21, so as to facilitate the detection of the verticality of the caisson through the connecting block 3. It should be noted that the friction between the sliding plate 21 and the guide rail is relatively large, and the measurement result of the connecting block 3 will not be deviated due to the movement of the sliding plate 21 itself.

[0090] Reference Figure 8 In another embodiment of the present application, in order to position the sliding block 562 in the inner cavity of the support block 561, the side walls of the limit block 563 are provided with limit grooves along the length direction thereof, and the limit grooves of the side walls are symmetrically arranged. Two limit plates 566 are fixedly connected to the opening of the groove by bolts, and the two limit plates 566 are respectively located in the limit grooves on both sides of the limit block 563 and are slidably connected to the limit grooves. When the limit spring 564 is in an extended state, the limit spring 564 pushes the limit block 563 into the limit hole 565, and the two limit plates 566 respectively abut against the side edges of the limit grooves on both sides, thereby limiting the sliding of the limit block 563. At the same time, the inner wall of the limit hole 565 abuts against the side wall of the limit block 563, and the limit plate 566 abuts against the side wall of the limit block 563, so that the sliding block 562 cannot slide in the inner cavity of the support block 561, so that the sliding block 562 is limited, ensuring that when the fixing mechanism 5 is vertically monitored in the caisson, it will not loosen and affect the actual monitoring situation.

[0091] The implementation principle of this embodiment is as follows: the caisson construction is combined with the pipe gallery support in a permanent and temporary manner, the caisson working shaft and the receiving shaft structure are used as the support structure on one side of the foundation pit, and the caisson is monitored by a caisson vertical monitoring device 1. The caisson vertical monitoring device 1 raises and lowers the connecting block 3, and feedbacks whether the connecting block is in contact with the ground according to the contact sensor 32 at the bottom of the connecting block 3, and judges whether the caisson is vertical to the ground according to the detection values ​​a1 and a2 fed back by the laser ranging sensor 31 when the connecting block 3 is lowered. Considering the influence of the ground flatness on the detection value a2 of the laser ranging sensor 31, an inclination sensor 33 is arranged inside the connecting block 3. When the inclination sensor 33 detects a tilt signal, the detection values ​​a1 and a3 fed back by the laser ranging sensor 31 are compared to judge the verticality of the caisson. When the inclination sensor 33 detects a tilt signal when the contact sensor 32 does not feed back a contact signal, the inclination sensor 33 detects that the caisson is tilted, and feeds back to the staff for timely adjustment. At the same time, the support work on the other side is carried out by directly sloped or steel sheet piles according to the construction requirements to complete the construction of the corridor and avoid the restrictions on construction caused by height restrictions. At the same time, the pipeline construction and corridor structure construction processes can be closely connected, effectively ensuring the safety and efficiency of the construction.

[0092] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection, characterized in that: The following steps are involved: S1. Carry out the construction of water-stop curtain in accordance with the space restriction requirements on site; S2. The jacking working well and the jacking receiving well are constructed and sunk in sections, and the verticality of the caisson sinking is detected by using the caisson verticality monitoring device (1); S3, construction of water stop piles at the top pipe opening; S4, jacking system installation, jacking construction measurement completion, jacking pipe section by section; S5. Excavate the foundation pit of the pipe gallery to the first support and select the support form for support; S6. Excavate the tunnel foundation pit to the tunnel base elevation.

2. The permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection according to claim 1 is characterized by: The caisson vertical monitoring device (1) comprises a control box (2), a connection block (3), a lifting mechanism (4), a fixing mechanism (5) and a laser distance sensor (31); the fixing mechanism (5) is arranged on one side of the control box (2) and is used to fix the control box (2) on the inner wall of the caisson; the connection block (3) is located below the control box (2); the laser distance sensor (31) is arranged on the upper surface of the connection block (3), and the detection end of the laser distance sensor (31) is arranged horizontally; the interior of the control box (2) is hollow; the lifting mechanism (4) is arranged in the inner cavity of the control box (2); the lifting part of the lifting mechanism (4) is connected to the connection block (3) and is used to lift the connection block (3); the bottom of the connection block (3) is fixedly connected with a contact sensor (32) and is used to monitor whether the bottom of the connection block (3) contacts the bottom of the well; a controller is arranged in the control box (2); the controller is electrically connected to the lifting mechanism (4), the laser distance sensor (31) and the contact sensor (32); Wherein, the controller is configured as follows: If a detection instruction for the verticality of the caisson is received, the current time is defined as time T1, the detection value a1 fed back by the laser ranging sensor 31 at time T1 is obtained, and the lifting mechanism (4) is controlled to descend; If the signal fed back by the contact sensor (32) indicates that the bottom of the well has been touched, the lifting mechanism (4) is controlled to stop responding and output an alarm prompt, and the current time is defined as time T2, and the detection value a2 fed back by the laser ranging sensor (31) at time T2 is obtained; The detection value a1 is compared with the detection value a2. If the comparison result exceeds the preset qualified range, a preset skew prompt is output.

3. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 2 is characterized in that: The fixing mechanism (5) comprises a connecting seat (51), a slide table (52), a fixing rod (53) and a fixing seat (54); the connecting seat (51) is arranged vertically, one end of the fixing seat (54) is fixedly connected to the upper end of the connecting seat (51), and the fixing seat (54) is arranged horizontally; a sliding groove (55) is provided in a square shape on the lower surface of the fixing seat (54) along its length, one end of the slide table (52) is slidably connected in the sliding groove (55), and a side wall of the connecting seat (51) facing the slide table (52) is provided with a sliding groove (55) for adjusting the connecting seat (51). An adjusting component (56) for adjusting the distance between the connecting seat (51) and the slide (52), the side wall of the connecting seat (51) abuts against the inner wall of the caisson, and the side wall of the slide (52) facing the connecting seat (51) abuts against the outer wall of the caisson, the adjusting component (56) is located below the fixing seat (54), one end of the fixing rod (53) is fixedly arranged in the adjusting component (56), and the other end of the fixing rod (53) is fixedly connected to the slide (52), and the control box (2) is fixedly connected to the side wall of the connecting seat (51) away from the slide (52).

4. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 3 is characterized in that: The adjustment assembly (56) comprises a support block (561), a sliding block (562), a limit block (563) and a limit spring (564); the support block (561) is fixedly connected to the side wall of the connecting seat (51) facing the sliding platform (52), and the support block (561) is arranged horizontally; the interior of the support block (561) is hollow and is opened toward the sliding platform (52); the sliding block (562) is slidably connected to the inner cavity of the support block (561), and the side wall of the sliding block (562) is provided with a groove. The limit spring (564) is arranged in the groove, one end of the limit spring (564) is fixedly connected to the bottom of the groove, and the other end of the limit spring (564) is fixedly connected to the limit block (563), and the side wall of the support block (561) located on one side of the groove is provided with a plurality of limit holes (565) along its length direction, one end of the limit block (563) away from the limit spring (564) extends out of the groove and slides through the limit hole (565), and one end of the fixed rod (53) is fixedly passed through the sliding block (562).

5. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 4 is characterized in that: The end portion of the limit block (563) which is away from the limit spring (564) is arranged in a spherical shape.

6. The permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection according to claim 1 is characterized by: The lifting mechanism (4) comprises a driving motor (41), a roller (42), a rotating shaft (43) and a traction rope (44); the driving motor (41) is arranged in the inner cavity of the control box (2), and the output shaft of the driving motor (41) is arranged horizontally; one end of the rotating shaft (43) is coaxially fixed to the output shaft of the driving motor (41), and the other end of the rotating shaft (43) is connected to the inner wall of the control box (2); the roller (42) is fixedly sleeved on the rotating shaft (43); one end of the traction rope (44) is fixedly connected to the cylinder of the roller (42), and the traction rope (44) is wound around the cylinder of the roller (42); a through groove for the traction rope (44) to slide through is opened through the bottom of the control box (2); the other end of the traction rope (44) is vertically extended downward toward the through groove; the upper end of the connecting block (3) is fixedly connected to the traction rope (44).

7. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 6 is characterized in that: The lower surface of the connection block (3) is provided with an embedding groove, the contact sensor (32) is fixedly connected in the embedding groove, and the detection end of the contact sensor (32) is arranged vertically downward.

8. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 7 is characterized in that: The interior of the connection block (3) is hollow, and the inner cavity of the connection block (3) is provided with an inclination sensor (33) for detecting the inclination of the connection block (3). The inclination sensor (33) is electrically connected to a controller, and the controller is configured as follows: Obtaining the detection value fed back by the tilt sensor (33), and determining whether it meets the preset connection block tilt condition, and if so, analyzing the cause of the tilt; If the analysis result is that the well wall is tilted, the detection value fed back by the tilt sensor (33) within a preset interval time T3 is obtained and recorded, and is defined as a detection value b1 and a detection value b2 respectively; Compare the detection value b1 with the detection value b2, and if the comparison result is within the preset difference range, output the detection value b2; If the analysis result shows that the well bottom is uneven, the detection value a3 fed back by the laser distance measuring sensor (31) before the connection block tilt condition is met is output.

9. The permanent and temporary combined pipe gallery top pipe caisson support construction method based on high pressure protection according to claim 8 is characterized by: The control box (2) is provided with a through opening along its width direction, and guide rails are provided at the through openings on both side walls of the control box (2) along its length direction. Sliding plates (21) are provided on both side walls of the control box (2), and the sliding plates (21) are connected to the through openings of the control box (2) by means of sliding constraints of the guide rails. The drive motor (41) is fixedly connected to the inner wall of the sliding plate (21) on one side, and the end of the rotating shaft (43) facing away from the drive motor (41) is rotatably connected to the inner wall of the sliding plate (21) on the other side of the control box (2).

10. The construction method for permanent and temporary combined pipe gallery top pipe caisson support based on high pressure protection according to claim 5 is characterized in that: The side walls on both sides of the limit block (563) are respectively provided with limit grooves along the length direction thereof, and two limit plates (566) are fixedly connected to the openings of the grooves. The two limit plates (566) are respectively slidably connected to the limit grooves on both sides of the limit block (563), and the side walls of the two limit plates (566) facing the bottom of the groove are respectively in contact with the side edges of the two ends of the limit grooves on both sides.

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