Tunnel secondary lining system and method

Abstract

The application relates to a tunnel secondary lining system and a method thereof, which comprises a tunnel trolley body, a walking trolley and a walking mechanism; the walking trolley comprises a trolley body, a base, a conveying pipeline and a telescopic rotating assembly, the conveying pipeline comprises a first discharging pipe, a corrugated pipe and a second discharging pipe, the telescopic rotating assembly comprises a rotating oil cylinder and a connecting piece, the first discharging pipe is connected with the base through the connecting piece, the rotating oil cylinder is installed on the trolley body, and a driving piece is arranged between the first discharging pipe and the second discharging pipe; the material distribution step comprises the following steps: positioning a concrete tank truck, lubricating the pipeline, pumping concrete, horizontally layering and symmetrically pouring the concrete and vibrating and compacting the concrete; through the telescopic rotating assembly, the direction of the second discharging pipe is adjusted, the second discharging pipe is rotated by 180 degrees, the required pouring opening of the tunnel trolley body in different directions is poured, the required pouring opening of the tunnel trolley body in different positions is poured, and the efficiency of the tunnel secondary lining is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel engineering, in particular to a tunnel secondary lining system and method thereof. BACKGROUND

[0002] With the rapid development of national transportation infrastructure, the highway industry has made great progress, among which, tunnel engineering accounts for a large proportion in highway construction, often constraining the continuity of road and bridge construction, making tunnel engineering an important construction node. In the process of tunnel construction, secondary lining is often used for tunnel construction, which refers to the inner lining built by using materials such as cast-in-place concrete or reinforced concrete under the condition of primary support.

[0003] A kind of easily disassembled rotary tunnel secondary lining material distributor is disclosed in Chinese patent No. 201910697192.9, comprising a ring-shaped mounting base plate, a pouring port assembly uniformly distributed along the circumference of the ring at the upper part of the mounting base plate, a rotary drive is arranged at the center of the mounting base plate, a rotary connecting plate is arranged at the upper part of the rotary drive, a pump pipe assembly is arranged on the rotary connecting plate, the pump pipe assembly is arranged in cooperation with the pouring port assembly, and a hydraulic control assembly is further arranged on the pump pipe assembly.

[0004] According to the above related technology, the applicant believes that in the process of tunnel construction, the position of the connecting plate is adjusted to adjust the rotary motion of the pump pipe, but when pouring concrete at different heights in the tunnel, the position of the mounting base plate needs to be adjusted by the worker according to the construction requirements, which affects the efficiency of the tunnel secondary lining. SUMMARY

[0005] In order to improve the efficiency of tunnel secondary lining, the present application provides a tunnel secondary lining system and method thereof.

[0006] In the first aspect, the present application provides a tunnel secondary lining system, which adopts the following technical scheme:

[0007] A tunnel secondary lining system, comprising a tunnel trolley body, a walking trolley and a walking mechanism;

[0008] The walking trolley comprises a trolley body, a base, a conveying pipe on the opposite sides of the trolley body and an extension and rotation assembly for adjusting the position of the two conveying pipes respectively, and the trolley body is arranged on the base;

[0009] The conveying pipe comprises a first discharge pipe, a corrugated pipe and a second discharge pipe connected in sequence, the first discharge pipe is rotatably connected with the trolley body, and the first discharge pipe is in communication with the inner cavity of the trolley body, the corrugated pipe is connected with the end of the first discharge pipe away from the trolley body, and the second discharge pipe is connected with the end of the corrugated pipe away from the first discharge pipe;

[0010] The telescopic rotating assembly comprises a rotating oil cylinder and a connecting piece, the first discharging pipe is connected with the base through the connecting piece, the rotating oil cylinder is installed on the vehicle body, and the rotating oil cylinder drives the first discharging pipe to rotate in the circumferential direction.

[0011] The first discharging pipe and the second discharging pipe are provided with a driving piece, the axis direction of the second discharging pipe is perpendicular to the axis direction of the first discharging pipe, and the driving piece drives the second discharging pipe to move in the radial direction of the first discharging pipe.

[0012] By adopting the above technical scheme, in the process of secondary lining in the tunnel, the rotating oil cylinder is adjusted, the rotating oil cylinder drives the first discharging pipe to rotate, the first discharging pipe drives the bellows and the second discharging pipe to rotate, the second discharging pipe is rotated to the discharging end of the second discharging pipe, the required pouring opening of the tunnel trolley body is faced, then the driving piece is adjusted, the driving piece drives the second discharging pipe to move, and the second discharging pipe is connected with the required pouring opening of the tunnel trolley body, then the concrete is poured into the required pouring opening of the tunnel trolley body at different positions; the designed tunnel secondary lining system is convenient for adjusting the direction of the second discharging pipe through the telescopic rotating assembly, the second discharging pipe is rotated by 180 degrees along the axis direction of the first discharging pipe, the required pouring opening of the tunnel trolley body in different directions is poured, and the required pouring opening of the tunnel trolley body at different positions is poured in cooperation with the driving piece, so that the efficiency of the tunnel secondary lining is improved.

[0013] Optionally, the driving piece comprises a mounting seat and an oil cylinder, the mounting seat is fixedly connected with the extension section of the first discharging pipe extending out of the inner cavity of the vehicle body, the oil cylinder is installed on the mounting seat, the piston rod of the oil cylinder is parallel to the axial direction of the second discharging pipe, and the piston rod of the oil cylinder is connected with the second discharging pipe.

[0014] By adopting the above technical scheme, the oil cylinder is adjusted, the oil cylinder drives the second discharging pipe to move, the bellows is elongated, and the second discharging pipe is connected with the pouring opening of the tunnel trolley body; the designed driving piece is convenient for adjusting the position of the second discharging pipe, and the second discharging pipe pours the pouring opening at different heights and different positions.

[0015] Optionally, the connecting piece comprises a connecting seat and a connecting bearing, the connecting seat is arranged on the base, the connecting bearing is installed on the connecting seat, and the connecting bearing is coaxially sleeved on the first discharging pipe.

[0016] By adopting the above technical scheme, the designed connecting piece is convenient for supporting the first discharging pipe, the rotation of the first discharging pipe in the circumferential direction is ensured, the stable rotation of the first discharging pipe is realized, and eccentric rotation of the first discharging pipe during rotation is avoided.

[0017] Optionally, the walking mechanism comprises a second driving motor, two slide rails and two groups of casters;

[0018] The two slide rails are arranged in parallel and along the length direction of the tunnel trolley body, and are mounted on the tunnel trolley body;

[0019] The two groups of casters are mounted on the bottom wall of the base and move along the slide rails;

[0020] The second driving motor is used to drive the rotation of the casters.

[0021] By adopting the above technical scheme, the second driving motor is adjusted, the driving shaft of the second driving motor drives the rotation of the casters, and then the casters move along the slide rails, so that the walking trolley moves to a specified position. The designed walking mechanism facilitates the position adjustment of the walking trolley, and then the pouring opening of the tunnel trolley body at different positions is poured.

[0022] Optionally, it further comprises a top-punching pouring monitoring mechanism, the top-punching pouring monitoring mechanism comprises a detection assembly, an early warning device and a control box, the detection assembly is used to detect whether the concrete reaches the pouring height, the detection assembly is electrically connected with the early warning device, the early warning device is electrically connected with the control box, and the control box is electrically connected with the walking trolley.

[0023] By adopting the above technical scheme, when the concrete is poured to a specified height, the detection mechanism detects the pouring height of the concrete, the early warning device alarms, and the early warning device sends a signal to the control box, and the control box sends a signal to the walking trolley, and the walking trolley stops pouring the concrete. The designed top-punching pouring monitoring mechanism facilitates the detection of the pouring height of the concrete and realizes the automatic control of the concrete pouring.

[0024] Optionally, the detection assembly comprises a flange, an RPC pipe, a metal induction wire and a pipe pusher;

[0025] The flange is mounted on the tunnel trolley body, the RPC pipe is coaxially connected with the flange, the RPC pipe extends through the flange to the waterproof plate of the tunnel, and one end of the RPC pipe away from the flange is connected with the pipe pusher;

[0026] At least one chute is formed in one end of the RPC pipe close to the waterproof plate of the tunnel, and the chute is arranged along the radial direction of the RPC pipe;

[0027] The metal induction wire is mounted in the inner cavity of the RPC pipe, one end of the metal induction wire is arranged close to the chute, and the other end of the metal induction wire penetrates out of the pipe pusher and is connected with the early warning device.

[0028] By adopting the technical scheme, when the pouring height of the concrete rises to the chute position, the slurry in the concrete flows into the RPC pipe inner cavity along the chute, the concrete slurry contacts the metal induction wire, the metal induction wire transmits a signal to the early warning device, the early warning device alarms, and the early warning device sends a signal to the control box, the control box sends a signal to the walking trolley, and the walking trolley stops pouring the concrete; the designed detection assembly detects the pouring height of the concrete through the metal induction wire installed in the RPC pipe inner cavity, so that the pouring of the concrete is automatically controlled, and meanwhile, the pouring height of the concrete is ensured.

[0029] Optionally, the RPC pipe is provided with a wire embedding groove at one end close to the tunnel waterproof plate, and the wire embedding groove and the chute are arranged along the radial direction of the RPC pipe; the metal induction wire comprises an integral vertical segment and a bent segment, the bent segment is arranged in the wire embedding groove, and the vertical segment is arranged to pass out of the RPC pipe.

[0030] By adopting the technical scheme, the designed wire embedding groove facilitates installation of the metal induction wire, so that the metal induction wire is arranged in the RPC pipe inner cavity; and the bent segment of the metal induction wire facilitates installation in cooperation with the wire embedding groove.

[0031] In a second aspect, the application provides a tunnel secondary lining method, which adopts the following technical scheme:

[0032] A tunnel secondary lining method, comprising the following steps:

[0033] S1, the concrete truck is positioned: the distribution system pipeline of the tunnel trolley body is connected to the delivery pump of the concrete truck, and is aligned with the first pouring horn of the tunnel trolley body;

[0034] S2, pipe lubrication: start the pumping switch of the concrete truck, first lubricate the delivery pipeline with water, and then lubricate the pipeline with mortar; close the pumping switch of the concrete truck, and then unload the concrete into the delivery pump of the concrete truck;

[0035] S3, concrete pumping:

[0036] S31, align and lock the inlet of the telescopic rotating assembly with the inlet horn at the front end of the first layer on one side of the tunnel trolley body, start the pumping switch of the concrete truck, and start pumping the concrete; when the secondary lining concrete pouring height is 480-520 mm, lubricate the inlet pipeline at the rear end of the first layer on one side of the tunnel trolley body;

[0037] S32, close the pumping switch of the concrete truck, open the pump station motor of the walking trolley, adjust the oil cylinder to retract the delivery pipeline, move the walking trolley to align the inlet of the telescopic rotating assembly with the inlet horn at the rear end of the first layer on the other side of the tunnel trolley body, close the pump station motor of the walking trolley, start the pumping switch of the concrete truck, and start pumping concrete; when the pouring height of the secondary lining concrete is 480-520 mm, lubricate the inlet pipeline at the rear end of the first layer on the other side of the tunnel trolley body;

[0038] S33, close the pumping switch of the concrete truck, open the pump station motor of the walking trolley, and adjust the oil cylinder to retract the delivery pipeline; move the walking trolley to align the second outlet pipe inlet with the inlet horn at the rear end of the first layer on the other side of the tunnel trolley body, close the pump station motor of the walking trolley, start the pumping switch of the concrete truck, and start pumping concrete;

[0039] S34, when the pouring height of the secondary lining concrete is 480-520 mm, lubricate the inlet pipeline at the front end of the first layer on the other side of the tunnel trolley body; close the pumping switch of the concrete truck, open the pump station motor of the walking trolley, and adjust the oil cylinder to retract the delivery pipeline; move the walking trolley to align the inlet of the telescopic rotating assembly with the inlet horn at the front end of the first layer on the other side of the tunnel trolley body, close the pump station motor of the walking trolley, start the pumping switch of the concrete truck, and start pumping concrete;

[0040] S4, horizontal layering and symmetrical pouring of concrete;

[0041] S5, concrete vibration.

[0042] Through adoption of the technical scheme, firstly, the concrete tank truck is transported to a designated position, then the distribution system pipeline of the tunnel trolley body is connected to the delivery pump of the concrete tank truck and is aligned with the first pouring horn of the tunnel trolley body; then, the pumping switch of the concrete tank truck is started, the delivery pipeline is first lubricated with water to ensure the closed wetness of the delivery pipeline, then the delivery pipeline is lubricated with mortar, the pumping switch of the concrete tank truck is closed, then the concrete is unloaded into the delivery pump of the concrete tank truck; then the inlet of the telescopic rotating assembly is locked with the inlet horn of the first layer front end working window on one side of the tunnel trolley body, the pumping switch of the concrete tank truck is started, the pumping speed of the concrete is adjusted, and the pumping of the concrete is started; when the pouring height of the secondary lining concrete is 480mm-520mm, the inlet pipeline of the first layer rear end working window on one side of the tunnel trolley body is lubricated; the pumping switch of the concrete tank truck is closed, the pump station motor of the walking trolley is started, the oil cylinder is adjusted to retract the delivery pipeline, the corresponding inlet horn of the tunnel trolley body and the inlet of the delivery pipeline are cleaned with a cloth, the walking trolley is moved to align the inlet of the telescopic rotating assembly with the inlet horn of the first layer rear end working window on one side of the tunnel trolley body, the pump station motor of the walking trolley is closed, the pumping switch of the concrete tank truck is started, and the pumping of the concrete is started; when the pouring height of the secondary lining concrete is 480mm-520mm, the inlet pipeline of the first layer rear end on the other side of the tunnel trolley body is lubricated; the pumping switch of the concrete tank truck is closed, the pump station motor of the walking trolley is started, the oil cylinder is adjusted to retract the delivery pipeline, the corresponding inlet horn of the tunnel trolley body and the inlet of the delivery pipeline are cleaned with a cloth, the walking trolley is moved to align the inlet of the telescopic rotating assembly with the inlet horn of the first layer rear end working window on one side of the tunnel trolley body, the pump station motor of the walking trolley is closed, the pumping switch of the concrete tank truck is started, and the pumping of the concrete is started; when the pouring height of the secondary lining concrete is 480mm-520mm, the inlet pipeline of the first layer front end on the other side of the tunnel trolley body is lubricated; the pumping switch of the concrete tank truck is closed, the pump station motor of the walking trolley is started, the oil cylinder is adjusted to retract the delivery pipeline, the corresponding inlet horn of the tunnel trolley body and the inlet of the delivery pipeline are cleaned with a cloth, the walking trolley is moved to align the inlet of the telescopic rotating assembly with the inlet horn of the first layer front end working window on one side of the tunnel trolley body, the pump station motor of the walking trolley is closed, the pumping switch of the concrete tank truck is started, and the pumping of the concrete is started; the concrete is poured in layers from low to high and is poured symmetrically on both sides of the tunnel trolley body, the pouring process is continuous, the intermittent time should not be more than 2h, and the "cold joint" caused by stopping is avoided; when the concrete is poured to 500mm below the working window of the tunnel trolley body, the dirt near the working window of the tunnel trolley body is scraped clean, the release agent is brushed, and the working window of the tunnel trolley body is closed; finally, the concrete is vibrated.The designed tunnel secondary lining method is characterized in that the concrete on both sides of the tunnel trolley body is horizontally layered and symmetrically poured, so that the layered multi-point pouring of the concrete is facilitated, the uniform distribution of the concrete is ensured, the traditional "one-hole pouring to the bottom" in the tunnel secondary lining process is avoided, and the pouring quality of the concrete in the tunnel secondary lining process is improved.

[0043] Optionally, the S5 comprises vibrating the concrete by using a vibrator, the vibrating time is 15s-30s each time, the moving distance of the vibrating rod of the adjacent two vibrators is 1-1.5 times of the action radius of the vibrator, the insertion depth of the vibrating rod into the concrete is 50mm-100mm into the lower layer of concrete, and the vibrating rod of the vibrator should be slowly pulled out after being vibrated and compacted.

[0044] By using the above technical scheme, in the concrete vibrating process, the concrete is vibrated by using a vibrator, the vibrating time is 15s-30s each time, the moving distance of the vibrating rod of the adjacent two vibrators is 1-1.5 times of the action radius of the vibrator, the insertion depth of the vibrating rod into the concrete is 50mm-100mm into the lower layer of concrete, and the vibrating rod of the vibrator should be slowly pulled out after being vibrated and compacted, so that the generation of lining cavities in the concrete pouring process is reduced, and the pouring quality of the concrete is improved.

[0045] In summary, the present application has at least one of the following beneficial technical effects:

[0046] 1. The designed tunnel secondary lining system is characterized in that the direction of the second discharge pipe is adjusted by the telescopic rotating assembly, so that the second discharge pipe is rotated by 180 degrees along the axis direction of the first discharge pipe, the required pouring opening of the tunnel trolley body in different directions is poured, the required pouring opening of the tunnel trolley body in different positions is poured by cooperating with the driving member, and the efficiency of the tunnel secondary lining is improved.

[0047] 2. The designed tunnel secondary lining method is characterized in that the concrete on both sides of the tunnel trolley body is horizontally layered and symmetrically poured, so that the layered multi-point pouring of the concrete is facilitated, the uniform distribution of the concrete is ensured, the traditional "one-hole pouring to the bottom" in the tunnel secondary lining process is avoided, and the pouring quality of the concrete in the tunnel secondary lining process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 is a schematic diagram of the overall structure of a tunnel secondary lining system according to Embodiment 1 of the present application;

[0049] Figure 2 is an enlarged schematic diagram of A of Figure 1 ;

[0050] Figure 3 is a schematic diagram of the local structure of a tunnel secondary lining system according to Embodiment 1 of the present application, which is intended to show the walking trolley;

[0051] Figure 4 is a partial structural schematic view of a tunnel secondary lining system according to Embodiment 1 of the present application, and is intended to show a detection assembly;

[0052] Figure 5 is a sectional view of Figure 4 .

[0053] Legend: 1, tunnel trolley body; 2, walking trolley; 21, trolley body; 22, base; 23, telescopic rotating assembly; 231, rotating oil cylinder; 232, connecting piece; 2321, connecting seat; 2322, connecting bearing; 233, driving piece; 2331, mounting seat; 2332, oil cylinder; 24, conveying pipeline; 241, first discharge pipe; 242, corrugated pipe; 243, second discharge pipe; 3, walking mechanism; 31, slide rail; 32, caster; 33, second driving motor; 4, top pouring monitoring mechanism; 41, detection assembly; 411, flange plate; 412, RPC pipe; 4121, chute; 4122, wire slot; 413, metal induction wire; 4131, bending section; 4132, vertical section; 414, pipe pusher. DETAILED DESCRIPTION

[0054] The following will be further explained in detail in combination with the accompanying drawings. Figures 1-5 The present application will be further explained in detail.

[0055] The present application discloses a tunnel secondary lining system and a method thereof.

[0056] Embodiment 1

[0057] Referring to Figure 1 and Figure 2 , a tunnel secondary lining system comprises a tunnel trolley body 1, a walking trolley 2, a walking mechanism 3 and a top pouring monitoring mechanism 4. The tunnel trolley body 1 is arranged in an arch shape. The walking mechanism 3 is installed on the tunnel trolley body 1, and the walking trolley 2 is installed on the walking mechanism 3. The top pouring monitoring mechanism 4 is installed on the tunnel trolley body 1, and the top pouring monitoring mechanism 4 is used to monitor the arch top concrete pouring condition.

[0058] Referring to Figure 3, the walking trolley 2 includes a trolley body 21, a base 22, conveying pipelines 24 located at opposite sides of the trolley body 21 and telescopic rotating assemblies 23 respectively used for adjusting positions of the two conveying pipelines 24, the trolley body 21 is arranged on the base 22 and is fixed on the base 22 by bolts, in addition, the two sets of conveying pipelines 24 are respectively located at front and rear ends of the trolley body 21; the conveying pipeline 24 includes a first discharging pipe 241, a corrugated pipe 242 and a second discharging pipe 243 connected in sequence, the first discharging pipe 241 is rotationally connected with the trolley body 21 and communicates with an inner cavity of the trolley body 21, the corrugated pipe 242 is connected with an end of the first discharging pipe 241 away from the trolley body 21, the corrugated pipe 242 and the first discharging pipe 241 are connected by a connecting joint, so that the corrugated pipe 242 and the first discharging pipe 241 are fixedly connected, the second discharging pipe 243 is connected with an end of the corrugated pipe 242 away from the first discharging pipe 241, the corrugated pipe 242 and the second discharging pipe 243 are connected by a connecting joint, so that the corrugated pipe 242 and the second discharging pipe 243 are fixedly connected; since the first discharging pipe 241 and the second discharging pipe 243 are connected by the corrugated pipe 242 in the application, the second discharging pipe 243 can be deflected, so as to adjust a direction of the second discharging pipe 243, and then realize cooperation and locking of the second discharging pipe 243 with a feeding horn of a working window of the tunnel trolley body 1.

[0059] With reference to Figure 3 , the telescopic rotating assembly 23 includes a rotating oil cylinder 231 and a connecting piece 232, the connecting piece 232 includes a connecting seat 2321 and a connecting bearing 2322, the connecting seat 2321 is arranged on the base 22 and is welded with a top wall of the base 22, the connecting bearing 2322 is installed on the connecting seat 2321 and coaxially sleeves the first discharging pipe 241, so as to rotate the first discharging pipe 241 along the connecting bearing 2322, the rotating oil cylinder 231 is installed on the trolley body 21 and is fixed on the trolley body 21 by bolts, and the rotating oil cylinder 231 drives the first discharging pipe 241 to rotate in a circumferential direction.

[0060] With reference to Figure 1 and Figure 3The driving member 233 is arranged between the first discharge pipe 241 and the second discharge pipe 243, the axis direction of the second discharge pipe 243 is perpendicular to the axis direction of the first discharge pipe 241, the driving member 233 drives the second discharge pipe 243 to move along the radial direction of the first discharge pipe 241, the driving member 233 comprises a mounting seat 2331 and an oil cylinder 2332, the mounting seat 2331 is fixedly connected with the extension section of the first discharge pipe 241 extending into the inner cavity of the vehicle body 21, and the mounting seat 2331 is welded with the first discharge pipe 241, a gap is left between the mounting seat 2331 and the vehicle body 21, so that the mounting seat 2331 and the first discharge pipe 241 can synchronously rotate; the oil cylinder 2332 is installed on the mounting seat 2331 and fixed on the mounting seat 2331 by bolts, the piston rod of the oil cylinder 2332 is parallel to the axial direction of the second discharge pipe 243, the piston rod of the oil cylinder 2332 is connected with the second discharge pipe 243, so that the second discharge pipe 243 and the piston rod of the oil cylinder 2332 move synchronously, the second discharge pipe 243 moves along the radial direction of the first discharge pipe 241, and the second discharge pipe 243 is locked with the feeding horn of the working window of the tunnel trolley body 1.

[0061] With reference to Figure 1 and Figure 2 The walking mechanism 3 comprises a second driving motor 33, two slide rails 31 and two groups of casters 32. The two slide rails 31 are arranged in parallel and along the length direction of the tunnel trolley body 1, and the slide rails 31 are installed on the tunnel trolley body 1 by bolts. The two groups of casters 32 are installed on the bottom wall of the base 22 and connected with the base 22 by bolts, so that the casters 32 are fixed with the base 22. In the application, each group of casters 32 can be two rollers, three rollers or four rollers, as long as the walking trolley 2 can move along the slide rails 31. In the embodiment, each group of casters 32 is provided with two rollers, and the two rollers are distributed near the two ends of the base 22, so as to stably support the base 22. The second driving motor 33 is used for driving the casters 32 to rotate. The second driving motor 33 is installed on the base 22 by bolts, the output shaft of the second driving motor 33 is coaxially connected with the casters 32, and the output shaft of the second driving motor 33 is keyed with the casters 32, so that the casters 32 move along the slide rails 31, and the walking trolley 2 moves along the slide rails 31.

[0062] With reference to Figure 1 and Figure 4The top pouring monitoring mechanism 4 comprises a detection assembly 41 for detecting whether the concrete reaches the pouring height, a warning device and a control box, the detection assembly 41 is electrically connected with the warning device, the warning device is electrically connected with the control box, and the control box is electrically connected with the walking trolley 2; the detection assembly 41 comprises a flange plate 411, an RPC pipe 412, a metal induction wire 413 and a pipe pusher 414; the flange plate 411 is installed on the tunnel trolley body 1, the RPC pipe 412 is coaxially connected with the flange plate 411, the RPC pipe 412 extends to the waterproof plate of the tunnel through the flange plate 411, and the end of the RPC pipe 412 away from the flange plate 411 is connected with the pipe pusher 414; at least one chute 4121 is formed at the end of the RPC pipe 412 close to the waterproof plate of the tunnel, the number of the chute 4121 can be one, two or three in the application, as long as the inner cavity of the RPC pipe 412 is communicated with the pouring cavity of the tunnel, the number of the chute 4121 is two in the embodiment, the two chutes 4121 are arranged along the radial direction of the RPC pipe 412, the two chutes 4121 are symmetrically arranged about the axial direction of the RPC pipe 412, and the length directions of the two chutes 4121 are located on the same straight line, the width of the chute 4121 is 5mm, and the depth of the chute 4121 is 10mm; a wire embedding groove 4122 is formed at the end of the RPC pipe 412 close to the waterproof plate of the tunnel, the wire embedding groove 4122 is arranged along the radial direction of the RPC pipe 412, and the wire embedding groove 4122 and the two chutes 4121 are uniformly distributed along the circumferential direction of the RPC pipe 412, the width of the wire embedding groove 4122 is 5mm, and the depth of the chute 4121 is 5mm; the metal induction wire 413 comprises a vertical section 4132 and a bent section 4131 which are integrally connected, the bent section 4131 is arranged in the wire embedding groove 4122, the vertical section 4132 is arranged outside the RPC pipe 412, the vertical section 4132 is installed in the inner cavity of the RPC pipe 412, and the end of the vertical section 4132 away from the bent section 4131 is connected with the warning device through the pipe pusher 414. Figure 5

[0063] ​The processing and installation steps of the RPC pipe 412 are as follows: firstly, the RPC pipe 412 is passed through the flange plate 411 to the waterproof plate of the tunnel, the length of the required RPC pipe 412 is measured, and a mark is drawn; secondly, 2 grooves 4121 with a depth of 10 mm and a width of 5 mm are cut at one end of the RPC pipe 412, and 1 embedded wire groove 4122 with a depth of 5 mm and a width of 5 mm is cut at the same end of the RPC pipe 412 provided with the grooves 4121, and the 2 grooves 4121 and the 1 embedded wire groove 4122 are uniformly distributed along the circumferential direction of the RPC pipe 412; then, the metal induction wire 413 is inserted into the embedded wire groove 4122 end of the RPC pipe 412, the end of the metal induction wire 413 is clamped in the embedded wire groove 4122, and the pre-buried RPC pipe 412 is installed on the pipe pusher 414; then, the pre-warning device and the metal induction wire 413 are connected in sequence, and the pouring of concrete is prepared, the main power supply of the control box and the pre-warning device switch are turned on, when the concrete is not poured full, the prompt light is in full bright state, when the secondary lining concrete contacts the end of the metal induction wire 413, the pre-warning device alarms; after the secondary lining is completed, the metal induction wire 413 is quickly pulled out and cleaned for repeated use next time.

[0064] The implementation principle of the tunnel secondary lining system in the embodiment 1 of the application is as follows: in the process of secondary lining in the tunnel, the rotary oil cylinder 231 is adjusted, the rotary oil cylinder 231 drives the first discharging pipe 241 to rotate, the first discharging pipe 241 drives the bellows pipe 242 and the second discharging pipe 243 to rotate, the second discharging pipe 243 is rotated to the position where the discharging end of the second discharging pipe 243 faces the required pouring opening of the tunnel trolley body 1, then the oil cylinder 2332 is adjusted, the oil cylinder 2332 drives the second discharging pipe 243 to move, so that the bellows pipe 242 is elongated and moves to the position where the second discharging pipe 243 is connected with the required pouring opening of the tunnel trolley body 1; the second driving motor 33 is adjusted, the driving shaft of the second driving motor 33 drives the caster 32 to rotate, thereby realizing the movement of the caster 32 along the slide rail 31, so that the walking trolley 2 moves to the specified position, thereby pouring concrete to the required pouring opening of the tunnel trolley body 1 at different positions.

[0065] Embodiment 2

[0066] A tunnel secondary lining method, comprising the following steps:

[0067] S1, the concrete tank truck is positioned: the distribution system pipeline of the tunnel trolley body 1 is connected to the delivery pump of the concrete tank truck, and is aligned with the first pouring horn of the tunnel trolley body 1;

[0068] S2, pipe lubrication: the pumping switch of the concrete tank truck is started, the delivery pipeline 24 is first lubricated with water, and then is lubricated with mortar; the pumping switch of the concrete tank truck is closed, and then the concrete is unloaded into the delivery pump of the concrete tank truck;

[0069] S3, concrete pumping:

[0070] S31, align and lock the inlet of the telescopic rotating assembly 23 with the inlet horn of the first layer of the front end working window on the right side of the tunnel trolley body 1, start the pumping switch of the concrete tank truck, and begin pumping concrete; when the pouring height of the secondary lining concrete is 480-520 mm, the pouring height of the first layer of the secondary lining concrete in this embodiment is 500 mm, and the inlet pipeline of the working window at the rear end of the first layer on the right side of the tunnel trolley body 1 is lubricated;

[0071] S32, close the pumping switch of the concrete tank truck, start the pump station motor of the walking trolley 2, adjust the oil cylinder 2332 to retract the delivery pipeline 24, move the walking trolley 2 to align the inlet of the telescopic rotating assembly 23 with the inlet horn of the working window at the rear end of the first layer on the right side of the tunnel trolley body 1, close the pump station motor of the walking trolley 2, start the pumping switch of the concrete tank truck, and begin pumping concrete; when the pouring height of the secondary lining concrete is 480-520 mm, the pouring height of the first layer of the secondary lining concrete in this embodiment is 500 mm, and the inlet pipeline of the working window at the rear end of the first layer on the left side of the tunnel trolley body 1 is lubricated;

[0072] S33, close the pumping switch of the concrete tank truck, start the pump station motor of the walking trolley 2, adjust the oil cylinder 2332 to retract the delivery pipeline 24; move the walking trolley 2 to align the inlet of the second delivery pipeline 243 with the inlet horn of the working window at the rear end of the first layer on the left side of the tunnel trolley body 1, close the pump station motor of the walking trolley 2, start the pumping switch of the concrete tank truck, and begin pumping concrete;

[0073] S34, when the pouring height of the secondary lining concrete is 480-520 mm, the pouring height of the first layer of the secondary lining concrete in this embodiment is 500 mm, and the inlet pipeline of the working window at the front end of the first layer on the left side of the tunnel trolley body 1 is lubricated; close the pumping switch of the concrete tank truck, start the pump station motor of the walking trolley 2, and adjust the oil cylinder 2332 to retract the delivery pipeline 24; move the walking trolley 2 to align the inlet of the telescopic rotating assembly 23 with the inlet horn of the working window at the front end of the first layer on the left side of the tunnel trolley body 1, close the pump station motor of the walking trolley 2, start the pumping switch of the concrete tank truck, and begin pumping concrete;

[0074] S4, concrete horizontal layering and symmetrical pouring: the concrete is layered from low to high and poured symmetrically on both sides of the tunnel trolley body 1, and the pouring process is continuous, and the intermittent time should not exceed 2 h to avoid "cold joints" caused by stopping;

[0075] S5, concrete vibration: using vibrator to vibrate the concrete, vibration time is 15s-30s each time, the moving distance of adjacent two vibrators is 1-1.5 times of the radius of the vibrator, the insertion depth of the vibrator into the concrete should be 50mm-100mm, the vibrator should be slowly pulled out after vibrating.

[0076] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A system for tunnel secondary lining, characterized in that, It includes the tunnel trolley body (1), the traveling trolley (2), and the traveling mechanism (3); The walking trolley (2) includes a trolley body (21), a base (22), conveying pipes (24) located on opposite sides of the trolley body (21), and telescopic rotating components (23) for adjusting the positions of the two conveying pipes (24) respectively. The trolley body (21) is mounted on the base (22). The conveying pipeline (24) includes a first discharge pipe (241), a corrugated pipe (242), and a second discharge pipe (243) connected in sequence. The first discharge pipe (241) is rotatably connected to the vehicle body (21) and communicates with the inner cavity of the vehicle body (21). The corrugated pipe (242) is connected to the end of the first discharge pipe (241) away from the vehicle body (21). The second discharge pipe (243) is connected to the end of the corrugated pipe (242) away from the first discharge pipe (241). The telescopic rotating assembly (23) includes a rotating cylinder (231) and a connector (232). The first discharge pipe (241) is connected to the base (22) through the connector (232). The rotating cylinder (231) is mounted on the vehicle body (21) and drives the first discharge pipe (241) to rotate circumferentially. A driving member (233) is provided between the first discharge pipe (241) and the second discharge pipe (243). The axial direction of the second discharge pipe (243) is perpendicular to the axial direction of the first discharge pipe (241). The driving member (233) drives the second discharge pipe (243) to move along the radial direction of the first discharge pipe (241). It also includes a top-pour monitoring mechanism (4), which includes a detection component (41), an early warning device and a control box. The detection component (41) is used to detect whether the concrete has reached the pouring height. The detection component (41) is electrically connected to the early warning device, the early warning device is electrically connected to the control box, and the control box is electrically connected to the traveling trolley (2). The detection assembly (41) includes a flange (411), an RPC pipe (412), a metal induction wire (413), and a pipe jacking device (414); The flange (411) is installed on the tunnel trolley body (1), the RPC pipe (412) is coaxially connected to the flange (411), the RPC pipe (412) passes through the flange (411) and extends to the waterproof plate of the tunnel, and the end of the RPC pipe (412) away from the flange (411) is connected to the pipe jacking device (414); At least one chute (4121) is provided at one end of the RPC pipe (412) near the tunnel waterproof membrane, and the chute (4121) is arranged along the radial direction of the RPC pipe (412). The metal sensing wire (413) is installed in the inner cavity of the RPC pipe (412), with one end of the metal sensing wire (413) located close to the chute (4121) and the other end passing through the jacking device (414) and connected to the warning device.

2. The tunnel secondary lining system according to claim 1, characterized in that The drive unit (233) includes a mounting base (2331) and a hydraulic cylinder (2332). The mounting base (2331) is fixedly connected to the extension of the first discharge pipe (241) extending out of the inner cavity of the vehicle body (21). The hydraulic cylinder (2332) is mounted on the mounting base (2331), and the piston rod of the hydraulic cylinder (2332) is parallel to the axial direction of the second discharge pipe (243). The piston rod of the hydraulic cylinder (2332) is connected to the second discharge pipe (243).

3. The tunnel secondary lining system according to claim 1, characterized in that The connector (232) includes a connector (2321) and a connector (2322). The connector (2321) is disposed on the base (22), and the connector (2322) is mounted on the connector (2321). The connector (2322) is coaxially sleeved on the first discharge pipe (241).

4. The tunnel secondary lining system according to claim 1, characterized in that The walking mechanism (3) includes a second drive motor (33), two slide rails (31) and two sets of casters (32); The two slide rails (31) are arranged in parallel, and the slide rails (31) are arranged along the length direction of the tunnel trolley body (1). The slide rails (31) are installed on the tunnel trolley body (1). The two sets of casters (32) are mounted on the bottom wall of the base (22), and the casters (32) move along the slide rail (31); The second drive motor (33) is used to drive the caster (32) to rotate.

5. The tunnel secondary lining system according to claim 1, characterized in that The RPC pipe (412) has a buried wire groove (4122) at one end near the tunnel waterproofing membrane. The buried wire groove (4122) and the chute (4121) are both arranged along the radial direction of the RPC pipe (412). The metal induction wire (413) includes an integrally connected vertical section (4132) and a bent section (4131). The bent section (4131) is laid in the buried wire groove (4122), and the vertical section (4132) extends out of the RPC pipe (412).

6. A method for secondary lining of a tunnel, characterized in that, The tunnel secondary lining system according to any one of claims 2-5 includes the following steps: S1. Concrete mixer truck positioning: Connect the concrete placement system pipeline of the tunnel trolley body (1) to the concrete mixer truck's delivery pump and align it with the first pouring horn of the tunnel trolley body (1). S2, Lubrication: Start the pumping switch of the concrete mixer truck, first lubricate the conveying pipeline (24) with water, and then lubricate the pipeline with mortar; turn off the pumping switch of the concrete mixer truck, and then unload the concrete into the conveying pump of the concrete mixer truck. S3, Concrete pumping: S31. Align and lock the inlet of the telescopic rotating component (23) with the inlet horn at the front end of the first layer on one side of the tunnel trolley body (1), start the pumping switch of the concrete mixer truck, and start pumping concrete; when the secondary lining concrete pouring height is 480mm-520mm, lubricate the inlet pipe at the rear end of the first layer on one side of the tunnel trolley body (1). S32. Turn off the pumping switch of the concrete mixer truck, turn on the pumping motor of the traveling trolley (2), and adjust the oil cylinder (2332) to retract the conveying pipeline (24). Move the traveling trolley (2) to align the inlet of the telescopic rotating component (23) with the inlet horn at the rear end of the first layer on one side of the tunnel trolley body (1). Turn off the pumping motor of the traveling trolley (2), start the pumping switch of the concrete mixer truck, and start pumping concrete. When the secondary lining concrete pouring height is 480mm-520mm, lubricate the inlet pipeline at the rear end of the first layer on the other side of the tunnel trolley body (1). S33. Turn off the pumping switch of the concrete mixer truck, turn on the pumping station motor of the traveling trolley (2), and adjust the oil cylinder (2332) to retract the conveying pipeline (24); move the traveling trolley (2) to align the inlet of the second discharge pipe (243) with the inlet horn of the first layer on the other side of the tunnel trolley body (1), turn off the pumping station motor of the traveling trolley (2), start the pumping switch of the concrete mixer truck, and start pumping concrete. S34. When the height of the secondary lining concrete pouring is 480mm-520mm, lubricate the feed pipe at the front end of the first layer on the other side of the tunnel trolley body (1); turn off the pumping switch of the concrete mixer truck, turn on the pumping station motor of the traveling trolley (2), and adjust the oil cylinder (2332) to retract the conveying pipe (24); move the traveling trolley (2) to align the feed port of the telescopic rotating component (23) with the feed horn port at the front end of the first layer on the other side of the tunnel trolley body (1), turn off the pumping station motor of the traveling trolley (2), start the pumping switch of the concrete mixer truck, and start pumping concrete. S4. Concrete is poured in horizontal layers and symmetrically. S5. Concrete vibration.

7. The tunnel secondary lining method according to claim 6, characterized in that, S5 includes using a vibrator to compact the concrete, with each compaction time being 15s-30s. The distance the vibrator rod moves between two adjacent compaction times is 1-1.5 times the radius of action of the vibrator. The insertion depth into the concrete should be 50mm-100mm into the lower layer of concrete. After compaction, the vibrator rod should be slowly pulled out.

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