A trolley-based tunnel secondary lining spraying maintenance device and a use method thereof

Abstract

The present application relates to the technical field of spray maintenance equipment, in particular to a tunnel secondary lining spray maintenance equipment based on a trolley and a use method thereof, comprising a trolley, a spray maintenance assembly, a movable avoidance module and a water pump, the trolley is used for moving along the inside of the tunnel, the spray maintenance assembly is installed at the end of the trolley, the spray maintenance assembly is used for spraying the tunnel secondary lining, the movable avoidance module is installed on one side of the trolley, the movable avoidance module cooperates with the spray maintenance assembly to form a complete spray maintenance surface, the water pump is installed on the top of the trolley, and the water pump is used for pumping maintenance water to the spray maintenance assembly, the movable avoidance module is driven to periodically extend and recover under the regulation and control of the external control equipment, the tunnel secondary lining full-face dead angle-free coverage is realized, the ventilation pipe fixed point can be accurately avoided, the spray path is prevented from being blocked, and the uniformity and reliability of the secondary lining maintenance are improved.

Description

Technical Field

[0001] This invention relates to the field of spray curing equipment technology, specifically to a tunnel secondary lining spray curing equipment based on a trolley and its usage method. Background Technology

[0002] In tunnel construction, the secondary lining is an important load-bearing and protective component of the tunnel structure. Its construction quality directly affects the overall stability, durability and operational safety of the tunnel. After the secondary lining concrete is poured, timely and sufficient spray curing is required. By continuously providing a humid environment, the evaporation rate of water inside the concrete is slowed down, and the cement hydration reaction is fully promoted, thereby avoiding quality defects such as drying shrinkage cracks and insufficient strength on the concrete surface, and ensuring the mechanical properties and service life of the secondary lining structure.

[0003] Currently, tunnel lining maintenance is mostly carried out by trolleys equipped with fixed spray pipes. Compared with traditional manual maintenance, this method significantly improves work efficiency, but it still faces interference problems in practical applications. To ensure air circulation during tunnel construction, PVC ventilation pipes need to be fixed section by section on the tunnel wall using special fasteners. These PVC ventilation pipes are continuously laid along the tunnel's longitudinal direction and fixed to the lining surface with fasteners. Since the spray pipes attached to the tunnel lining have a fixed configuration, their spray range cannot be adjusted. When the trolley carries the spray pipes along the tunnel for maintenance, the fixing fasteners of the PVC ventilation pipes will obstruct the movement of the spray pipes with the trolley, preventing the trolley from moving continuously. Currently, the common solution is to not install spray pipes on the side where the PVC ventilation pipes are installed. After the trolley passes, a dedicated person enters the tunnel and uses a handheld sprayer or other tools to supplement the maintenance in the missing areas. This method increases labor costs and the work cycle. Therefore, a trolley-based tunnel lining spray maintenance equipment and its usage method are proposed. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a tunnel secondary lining spraying maintenance equipment and its usage method based on a trolley.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a tunnel secondary lining spray curing device based on a trolley, comprising a trolley, a spray curing component, a movable avoidance module and a water pump;

[0006] The trolley is used to move along the inside of the tunnel;

[0007] The spray curing component is installed at the end of the trolley and is used to spray the tunnel secondary lining.

[0008] The movable avoidance module is installed on one side of the trolley. The movable avoidance module is used to lift and pull the movable part of the spray maintenance component. The movable part of the spray maintenance component is periodically raised and lowered under the pull of the movable avoidance module.

[0009] The water pump is installed on the top of the trolley and is used to pump maintenance water to the spray maintenance component. The maintenance water is sprayed out by the spray maintenance component to form a maintenance water mist.

[0010] Preferably, the trolley includes a traveling section, a platform is mounted on the top of the traveling section, several sets of railings are mounted on both sides of the platform, and a water tank is mounted on the top of the platform.

[0011] Preferably, the spray maintenance component includes a main support frame welded to the upper end of the platform. A main support plate is welded to the upper part of the main support frame. A main water pipe is installed inside the main support plate. Several sets of nozzles for atomizing water are opened at the top of the main water pipe. A side support plate is bolted to one side of the main support plate. A side water pipe is installed inside the side support plate. The end of the side water pipe is connected to one end of the main water pipe. Several sets of nozzles for atomizing water are evenly spaced at the top of the main water pipe and the side water pipe.

[0012] Preferably, the other end of the main water pipe is connected to a flexible hose, which serves as a movable part of the spray maintenance component. Several sets of nozzles for atomizing water are evenly spaced on the top of the flexible hose. A traction rope is connected to the end of the flexible hose. The movable avoidance module is used to support the flexible hose, and the flexible hose maintains an orientation synchronized with the main water pipe under the support of the movable avoidance module.

[0013] Preferably, the movable avoidance module includes a rotating pull rod, which is mounted on the lower part of the main support via a rotating shaft. A movable support plate is welded and fixed to the end of the rotating pull rod, and a guide roller is mounted on the end of the movable support plate via a rotating shaft. Several sets of limiting brackets are installed at equal intervals on the lower part of the rotating pull rod, and a spring is installed on the lower part of the rotating pull rod. The traction rope passes through each set of limiting brackets in sequence and is connected to the end of the spring. The hose is laid flat on the outer wall surface of the movable support plate under the traction of the traction rope.

[0014] Preferably, the movable pallet is arc-shaped and cooperates with the main pallet, the outer wall surface of the movable pallet is in contact with the inner wall surface of the main pallet, the middle part of the guide roller shaft is arc-shaped and cooperates with the flexible hose, and the flexible hose is clamped in the middle part of the guide roller shaft.

[0015] Preferably, the movable avoidance module further includes a rotating pull rope module, which is installed in the middle of the main support. The rotating pull rope module includes a lead screw motor, a reversing roller assembly, and a pull rope. The lead screw motor is installed in the middle of the main support, and the reversing roller assembly is installed at the top of the main support. The reversing roller assembly is aligned with the lead screw motor. The two ends of the pull rope are respectively connected to the end of the rotating pull rod and the movable block of the lead screw motor. The middle of the pull rope passes through the reversing roller assembly.

[0016] Preferably, the inlet of the water pump is connected to the water tank, and the outlet of the water pump is connected to the main water pipe.

[0017] Preferably, both the lead screw motor and the traveling mechanism are connected to an external control device, and the running speed of the traveling mechanism and the working cycle of the lead screw motor are controlled by the external control device.

[0018] A method for using a trolley-based tunnel secondary lining spray curing device includes the following steps:

[0019] Step S1: Control the traveling unit through the external control device to drive the trolley to the starting position of the tunnel secondary lining to be cured, adjust the trolley posture so that the spray curing component faces the tunnel secondary lining wall to be cured, and ensure that the equipment is in a stable state.

[0020] Step S2: Start the water pump through the external control device. The water pump delivers the maintenance water in the water tank to the main water pipe. After the water is diverted through the main water pipe, it flows into the side water pipe and the hose simultaneously. Finally, it is atomized and sprayed out through the nozzles at the top of the main water pipe, the side water pipe and the hose to form a spray surface covering the tunnel lining.

[0021] Step S3: Set the running speed of the traveling unit through the external control device, so that the trolley can move forward at a constant speed along the tunnel along the spray curing components, the movable avoidance module and the water pump to maintain the continuity of spray curing. During the forward movement of the trolley, set the working cycle of the screw motor according to the setting spacing of the PVC ventilation pipe fixing fasteners. When the trolley runs in front of a set of ventilation pipe fixing fasteners, the screw motor runs and pulls the pull rope. Under the limit guidance of the reversing roller group, the pull rope drives the rotating pull rod, so that the rotating pull rod drives the movable pallet to lift up. After the trolley passes the ventilation pipe fixing fasteners, the screw motor resets, and the pull rope resets synchronously with the screw motor. Under the limit guidance of the reversing roller group, the pull rope drives the rotating pull rod, so that the rotating pull rod drives the movable pallet to lower down.

[0022] Step S4: When the movable pallet moves with the trolley to the fixed fastener of the PVC ventilation pipe, and the movable pallet rotates and slides in the opposite direction, the spring resets and pulls the traction rope. The traction rope drives the hose around the guide roller shaft and back to the back of the movable pallet. The movable pallet avoids the fixed fastener and achieves periodic avoidance. When the movable pallet rotates and slides in the forward direction, the guide roller shaft at its end pushes the hose out from the back of the movable pallet. The end of the hose is pulled by the traction rope to deform and extend the spring, ensuring that the hose always fits in contact with the tunnel secondary lining wall for spraying.

[0023] Step S5: When the trolley moves to the end of the tunnel lining maintenance area, the water pump is turned off and the spraying operation is stopped by the external control equipment. After the residual water in the main water pipe, side water pipe and hose is drained, the traveling unit is operated to move the equipment to the designated parking position outside the tunnel to complete this maintenance operation.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] In this invention, the movable avoidance module, under the control of external control equipment, drives the hose to extend and retract periodically. This ensures that the hose, main water pipe, and side water pipe synchronously form a complete arc-shaped spray curing surface, achieving full-section coverage of the tunnel secondary lining without dead angles. It can also accurately avoid the fixed points of the ventilation pipe, preventing the spray path from being blocked, thus improving the uniformity and reliability of the secondary lining curing. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional rear view structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the spray maintenance component structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the local spray maintenance component structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the active obstacle avoidance module structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the actual operating state of the present invention.

[0032] The numbers in the diagram represent: 1. Trolley; 11. Walking mechanism; 12. Frame; 13. Fence; 14. Water tank; 2. Spray curing components; 21. Main support; 22. Main support plate; 23. Main water pipe; 24. Side support plate; 25. Side water pipe; 26. Hose; 27. Traction rope; 3. Movable avoidance module; 31. Rotating pull rod; 32. Movable support plate; 33. Guide roller shaft; 34. Limit bracket; 35. Spring; 36. Rotating pull rope module; 361. Screw motor; 362. Reversing roller shaft assembly; 363. Pull rope; 4. Water pump. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, which illustrate the above and other technical features and advantages of the present invention. However, the following embodiments are merely preferred embodiments of the present invention and are not exhaustive.

[0034] Example:

[0035] like Figures 1-6 As shown, the present invention provides a tunnel secondary lining spray curing device based on a trolley, including a trolley 1, a spray curing component 2, a movable avoidance module 3, and a water pump 4;

[0036] Trolley 1 is used to move along the inside of the tunnel;

[0037] The spray curing component 2 is installed at the end of the trolley 1 and is used to spray the tunnel secondary lining.

[0038] The movable avoidance module 3 is installed on one side of the trolley 1. The movable avoidance module 3 is used to lift and pull the movable part of the spray maintenance component 2. The movable part of the spray maintenance component 2 is periodically lifted and lowered under the pull of the movable avoidance module 3.

[0039] Water pump 4 is installed on the top of trolley 1. Water pump 4 is used to pump maintenance water to spray maintenance component 2. After the maintenance water is sprayed out by spray maintenance component 2, it forms maintenance water mist.

[0040] The trolley 1 includes a traveling part 11, a platform 12 is installed on the top of the traveling part 11, several sets of railings 13 are installed on both sides of the platform 12, and a water tank 14 is installed on the top of the platform 12. The traveling part 11 drives the platform 12 and the spray maintenance component 2, the moving avoidance module 3 and the water pump 4 on the platform 12 to move synchronously.

[0041] The spray maintenance component 2 includes a main support 21, which is welded to the top of the end of the platform 12. A main support plate 22 is welded to the top of the main support 21. A main water pipe 23 is installed inside the main support plate 22. Several sets of nozzles for atomizing water are opened on the top of the main water pipe 23. A side support plate 24 is bolted to one side of the main support plate 22. A side water pipe 25 is installed inside the side support plate 24. The end of the side water pipe 25 is connected to one end of the main water pipe 23. Several sets of nozzles for atomizing water are evenly spaced on the top of the main water pipe 23 and the side water pipe 25. The other end of the main water pipe 23 is connected to a hose 26. The hose 26 is a movable part of the spray maintenance component 2. Several sets of nozzles for atomizing water are evenly spaced on the top of the hose 26. After the water enters the main water pipe 23, it flows into the hose 26 simultaneously and is sprayed out through the nozzles on the top of the main water pipe 23 and the hose 26.

[0042] The end of the hose 26 is connected to a traction rope 27. The movable avoidance module 3 is used to support the hose 26. Under the support of the movable avoidance module 3, the hose 26 maintains the same orientation as the main water pipe 23. After the water enters the main water pipe 23, it flows into the hose 26 in sync and is sprayed out through the nozzle inside the hose 26.

[0043] The movable avoidance module 3 includes a rotating pull rod 31, which is mounted on the lower part of the main support 21 via a rotating shaft. A movable support plate 32 is welded and fixed to the end of the rotating pull rod 31. A guide roller shaft 33 is mounted on the end of the movable support plate 32 via a rotating shaft. Several sets of limiting brackets 34 are evenly spaced on the lower part of the rotating pull rod 31. A spring 35 is mounted on the lower part of the rotating pull rod 31. A traction rope 27 passes through each set of limiting brackets 34 and connects to the end of the spring 35. A flexible hose 26 is laid flat on the outer wall surface of the movable support plate 32 under the traction of the traction rope 27. The movable support plate 32 is arc-shaped to cooperate with the main support plate 22. The outer wall surface of the movable support plate 32 is in contact with the inner wall surface of the main support plate 22. The middle part of the guide roller shaft 33 is arc-shaped to cooperate with the flexible hose 26. The flexible hose 26 is clamped in the middle of the guide roller shaft 33. When the movable pallet 32 ​​rotates and slides forward along the main pallet 22, the guide roller 33 at the end of the movable pallet 32 ​​pushes the hose 26, causing the hose 26 to gradually move out from behind the movable pallet 32. During the movement, the end position of the hose 26 changes accordingly. As the end of the hose 26 moves, it pulls the spring 35 through the traction rope 27. The spring 35 deforms and elongates under the pull of the traction rope 27. When the movable pallet 32 ​​rotates and slides in the opposite direction along the main pallet 22, the spring 35 gradually returns to its initial shape. During the return process of the spring 35, the traction rope 27 is gradually pulled. The traction rope 27 pulls the hose 26, causing the hose 26 to rewind around the guide roller 33 and return to the back of the movable pallet 32. During the retraction process of the hose 26, the limiting bracket 34 limits the hose 26. The hose 26 is restricted by the limiting bracket 34.

[0044] The obstacle avoidance module 3 also includes a rotating pull rope module 36, which is installed in the middle of the main support 21. The rotating pull rope module 36 includes a lead screw motor 361, a reversing roller assembly 362, and a pull rope 363. The lead screw motor 361 is installed in the middle of the main support 21, and the reversing roller assembly 362 is installed on the top of the main support 21. The reversing roller assembly 362 is aligned with the lead screw motor 361. The two ends of the pull rope 363 are respectively connected to the end of the rotating pull rod 31 and the lead screw motor 361. The movable block of 61 is connected, and the middle part of the pull rope 363 passes through the reversing roller shaft group 362. The reversing roller shaft group 362 limits and guides the pull rope 363. The part of the pull rope 363 located between the reversing roller shaft group 362 and the lead screw motor 361 remains perpendicular, thereby ensuring that the lead screw motor 361 can stably pull the pull rope 363. When the pull rope 363 is pulled by the lead screw motor 361, it synchronously pulls the rotating pull rod 31, thereby causing the rotating pull rod 31 to drive the movable support plate 32 to move.

[0045] The inlet of the water pump 4 is connected to the water tank 14, and the outlet of the water pump 4 is connected to the main water pipe 23. When the equipment is running, the water pump 4 pumps the maintenance water in the water tank 14 into the main water pipe 23. The water enters the side water pipe 25 and the hose 26 through the main water pipe 23. The water in the main water pipe 23, the side water pipe 25 and the hose 26 is sprayed out through the nozzle to form atomized water mist.

[0046] Both the lead screw motor 361 and the traveling part 11 are connected to an external control device. The running speed of the traveling part 11 and the working cycle of the lead screw motor 361 are controlled by the external control device. When the equipment is running, the running speed of the traveling part 11 is controlled by the external control device, thereby controlling the overall moving speed of the equipment. The lead screw motor 361 reciprocates under the synchronous control of the external control device, pulling the rotating rod 31 and the movable support plate 32 to periodically lift and lower, so that as the traveling part 11 moves forward, the movable support plate 32 periodically avoids the fixed point of the fixed PVC ventilation pipe.

[0047] The method of using the trolley-based tunnel secondary lining spray curing equipment includes the following steps:

[0048] Step S1: Control the walking unit 11 through the external control device to drive the trolley 1 to move to the starting position of the tunnel secondary lining to be cured, adjust the attitude of the trolley 1 so that the spray curing component 2 faces the tunnel secondary lining wall to be cured, and ensure that the equipment is in a stable state.

[0049] Step S2: Start water pump 4 through external control equipment. Water pump 4 pumps the maintenance water in water tank 14 to main water pipe 23. After the water is diverted through main water pipe 23, it flows into side water pipe 25 and hose 26 simultaneously. Finally, it is atomized and sprayed out through nozzles at the top of main water pipe 23, side water pipe 25 and hose 26 to form a spray surface covering the tunnel lining.

[0050] Step S3: The running speed of the traveling part 11 is set by the external control device, so that the trolley 1 drives the spray curing component 2, the movable avoidance module 3 and the water pump 4 to move forward at a constant speed along the inside of the tunnel to maintain the continuity of spray curing. During the forward movement of the trolley 1, the working cycle of the screw motor 361 is set according to the setting spacing of the PVC ventilation pipe fixing fasteners. When the trolley 1 runs in front of a set of ventilation pipe fixing fasteners, the screw motor 361 runs and pulls the pull rope 363. Under the limit guidance of the reversing roller group 362, the pull rope 363 drives the rotating pull rod 31, so that the rotating pull rod 31 drives the movable pallet 32 ​​to lift. After the trolley 1 passes the ventilation pipe fixing fasteners, the screw motor 361 resets, and the pull rope 363 resets synchronously with the screw motor 361. Under the limit guidance of the reversing roller group 362, the pull rope 363 drives the rotating pull rod 31, so that the rotating pull rod 31 drives the movable pallet 32 ​​to lower.

[0051] In step S4, when the movable pallet 32 ​​moves with the trolley 1 to the fixed fastener of the PVC ventilation pipe, and the movable pallet 32 ​​rotates and slides in the opposite direction, the spring 35 resets and pulls the traction rope 27. The traction rope 27 drives the hose 26 to pass around the guide roller shaft 33 and return to the back of the movable pallet 32. The movable pallet 32 ​​avoids the fixed fastener and achieves periodic avoidance. When the movable pallet 32 ​​rotates and slides in the forward direction, the guide roller shaft 33 at its end pushes the hose 26 out from the back of the movable pallet 32. The end of the hose 26 is stretched by the traction rope 27 pulling the spring 35 to ensure that the hose 26 always fits in contact with the tunnel secondary lining wall for spraying.

[0052] Step S5: When the trolley 1 moves to the end of the tunnel secondary lining maintenance area, the water pump 4 is turned off by the external control equipment to stop the spraying operation. After the residual water in the main water pipe 23, side water pipe 25 and hose 26 is drained, the walking unit 11 is operated to move the equipment to the designated parking position outside the tunnel to complete this maintenance operation.

[0053] The above are merely preferred embodiments of the present invention and are illustrative in nature, not restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A tunnel secondary lining spray curing device based on a trolley, characterized in that, Includes a trolley (1), a spray maintenance component (2), a moving avoidance module (3), and a water pump (4); The trolley (1) is used to move along the inside of the tunnel; The spray curing component (2) is installed at the end of the trolley (1). The spray curing component (2) is used to spray the secondary lining of the tunnel. The spray curing component (2) includes a main support (21), a main support plate (22), a main water pipe (23), a side support plate (24), a side water pipe (25), a hose (26), and a traction rope (27). The movable avoidance module (3) is installed on one side of the trolley (1). The movable avoidance module (3) is used to lift and pull the movable part of the spray maintenance component (2). The movable part of the spray maintenance component (2) is periodically lifted and lowered under the pull of the movable avoidance module (3). The movable avoidance module (3) includes a rotating pull rod (31), which is installed on the lower part of the main support (21) via a rotating shaft. A movable support plate (32) is welded and fixed to the end of the rotating pull rod (31). A guide roller shaft (33) is installed on the end of the movable support plate (32) via a rotating shaft. Several sets of limiting brackets (34) are installed at equal intervals on the lower part of the rotating pull rod (31). A spring (35) is installed on the lower part of the rotating pull rod (31). The traction rope (27) passes through each set of limiting brackets (34) in sequence and is connected to the end of the spring (35). The hose (26) is laid flat on the outer wall surface of the movable support plate (32) under the traction of the traction rope (27). The movable pallet (32) is arc-shaped to cooperate with the main pallet (22). The outer wall surface of the movable pallet (32) is in contact with the inner wall surface of the main pallet (22). The middle part of the guide roller shaft (33) is arc-shaped to cooperate with the flexible hose (26). The flexible hose (26) is stuck in the middle part of the guide roller shaft (33). The movable avoidance module (3) also includes a rotating pull rope module (36), which is installed in the middle of the main support (21). The rotating pull rope module (36) includes a screw motor (361), a reversing roller assembly (362), and a pull rope (363). The screw motor (361) is installed in the middle of the main support (21), and the reversing roller assembly (362) is installed on the top of the main support (21). The reversing roller assembly (362) is aligned with the screw motor (361). The two ends of the pull rope (363) are respectively connected to the end of the rotating pull rod (31) and the movable block of the screw motor (361). The middle part of the pull rope (363) passes through the reversing roller assembly (362). The water pump (4) is installed on the top of the trolley (1). The water pump (4) is used to pump maintenance water to the spray maintenance component (2). The maintenance water is sprayed out by the spray maintenance component (2) to form maintenance water mist.

2. The tunnel secondary lining spray curing equipment based on a trolley as described in claim 1, characterized in that, The trolley (1) includes a traveling part (11), a platform (12) is installed on the top of the traveling part (11), several sets of railings (13) are installed on both sides of the platform (12), and a water tank (14) is installed on the top of the platform (12).

3. The tunnel secondary lining spray curing equipment based on a trolley as described in claim 2, characterized in that, The main support (21) is welded to the top of the end of the platform (12). A main support plate (22) is welded to the top of the main support (21). A main water pipe (23) is installed inside the main support plate (22). Several sets of nozzles for atomizing water are opened on the top of the main water pipe (23). A side support plate (24) is installed on one side of the main support plate (22) by bolts. A side water pipe (25) is installed inside the side support plate (24). The end of the side water pipe (25) is connected to one end of the main water pipe (23). Several sets of nozzles for atomizing water are evenly spaced on the top of the main water pipe (23) and the side water pipe (25).

4. The tunnel secondary lining spray curing equipment based on a trolley as described in claim 3, characterized in that, The other end of the main water pipe (23) is connected to a hose (26). The hose (26) is a movable part of the spray maintenance component (2). Several sets of nozzles for atomizing water are evenly spaced on the top of the hose (26). The end of the hose (26) is connected to a traction rope (27). The movable avoidance module (3) is used to support the hose (26). The hose (26) is kept in the same orientation as the main water pipe (23) under the support of the movable avoidance module (3).

5. A tunnel secondary lining spray curing device based on a trolley as described in claim 2, characterized in that, The inlet of the water pump (4) is connected to the water tank (14), and the outlet of the water pump (4) is connected to the main water pipe (23).

6. The tunnel secondary lining spray curing equipment based on a trolley as described in claim 1, characterized in that, Both the lead screw motor (361) and the traveling unit (11) are connected to an external control device, and the running speed of the traveling unit (11) and the working cycle of the lead screw motor (361) are controlled by the external control device.

7. A method of using a trolley-based tunnel lining spray curing device as described in any one of claims 1-6, characterized in that, Includes the following steps: Step S1: Control the walking unit (11) through the external control device to drive the trolley (1) to move to the starting position of the tunnel secondary lining to be cured, adjust the posture of the trolley (1) so that the spray curing component (2) faces the tunnel secondary lining wall to be cured, and ensure that the equipment is in a stable state. Step S2: Start the water pump (4) through the external control device. The water pump (4) pumps the maintenance water in the water tank (14) to the main water pipe (23). After the water is diverted through the main water pipe (23), it flows into the side water pipe (25) and the hose (26) simultaneously. Finally, it is atomized and sprayed out through the nozzles at the top of the main water pipe (23), the side water pipe (25) and the hose (26) to form a spray surface covering the tunnel lining. Step S3: The running speed of the traveling unit (11) is set by the external control device, so that the trolley (1) drives the spray curing component (2), the moving avoidance module (3) and the water pump (4) to move forward at a constant speed along the inside of the tunnel to maintain the continuity of spray curing. During the forward movement of the trolley (1), the working cycle of the screw motor (361) is set according to the setting spacing of the PVC ventilation pipe fixing fasteners, so that when the trolley (1) runs to a set of ventilation pipe fixing fasteners, the screw motor (361) runs and pulls the pull rope (36) 3) The pull rope (363) drives the rotating pull rod (31) under the limit guidance of the reversing roller shaft group (362), so that the rotating pull rod (31) drives the movable pallet (32) to lift up. After the trolley (1) passes through the ventilation pipe and the fastener, the screw motor (361) resets and the pull rope (363) resets synchronously with the screw motor (361). The pull rope (363) drives the rotating pull rod (31) under the limit guidance of the reversing roller shaft group (362), so that the rotating pull rod (31) drives the movable pallet (32) to lower down. Step S4: When the movable pallet (32) moves with the trolley (1) to the fixed fastener of the PVC ventilation pipe, and the movable pallet (32) rotates and slides in the opposite direction, the spring (35) resets and pulls the traction rope (27). The traction rope (27) drives the hose (26) to pass around the guide roller shaft (33) and return to the back of the movable pallet (32). The movable pallet (32) avoids the fixed fastener and achieves periodic avoidance. When the movable pallet (32) rotates and slides in the forward direction, the guide roller shaft (33) at its end pushes the hose (26) to move out from the back of the movable pallet (32). The end of the hose (26) is pulled by the traction rope (27) to deform and elongate the spring (35), ensuring that the hose (26) always fits the tunnel secondary lining wall for spraying. Step S5: When the trolley (1) moves to the end of the tunnel secondary lining maintenance area, the water pump (4) is turned off by the external control equipment to stop the spraying operation. After the residual water in the main water pipe (23), side water pipe (25) and hose (26) is drained, the walking unit (11) is operated to move the equipment to the designated parking position outside the tunnel to complete this maintenance operation.

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