Modular grouting device and method suitable for tunnel karst cave treatment

Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a modular grouting device and method suitable for tunnel karst cave treatment.The modular grouting device comprises a pipe shed steel pipe, a butt-joint base is arranged at one end of the pipe shed steel pipe, a butt-joint head is fixed to the other end of the pipe shed steel pipe, and the exterior of the butt-joint head is in threaded connection with an adapter female head; a grouting connector is in threaded connection with the interior of the adapter female head, an adapter male head is inserted into the side, away from the butt joint, of the interior of the adapter female head, a high-pressure grouting hose is arranged in the adapter male head, and a pushing rod is in threaded connection with the end, away from the adapter female head, of the adapter male head; a hole is drilled in advance through a pipe shed drilling machine, then a pipe shed steel pipe is pushed into the hole through the pipe shed drilling machine, then a high-pressure grouting hose is connected through a grout stop valve, a grouting machine inputs grout into the pipe shed steel pipe through the high-pressure grouting hose, and the pipe shed steel pipe is reserved in soil to be matched with the injected grout to form a pipe shed. And local collapse of the karst cave caused by taking out the pipe shed steel pipe after grouting can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction, in particular to a modular grouting device and method suitable for tunnel karst cave treatment. Background Art

[0002] During the development of the interior of the mountain, it will be necessary to build tunnels. During the construction of the tunnels, caves may be encountered. At this time, the interior of the caves will need to be grouting treated. Grouting can improve the strength of the tunnel caves and make the tunnel more stable during use.

[0003] A patent application with the existing publication number CN107179110A discloses a grouting device for karst tunnel caves, including a grouting pump, a tee pipe and a grouting flower pipe with multiple grouting holes. The spherical check plug can be driven to rotate from a connection position to a blocking position through a rotating rod. When in the blocking position, the outer wall of the spherical check plug can block the port of the inner tube.

[0004] During use of the above technical solution, the grouting tube needs to be inserted into the soil and then grouting is carried out. However, after the grouting is completed, the grouting tube needs to be pulled out from the grouting hole. The slurry injected in this process has not solidified. Pulling out the grouting tube can easily cause the soil near the hole to loosen, thereby causing collapse in some areas of the cave.

[0005] To this end, the present invention provides a modular grouting device and method suitable for tunnel cave treatment. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the modular grouting device suitable for tunnel cave treatment described in the present invention comprises a pipe-roof steel pipe, one end of the pipe-roof steel pipe is provided with a docking seat, the other end of the pipe-roof steel pipe is fixed with a docking joint, the docking seat can be threadedly connected with the docking joint, the external thread of the docking joint is connected with a conversion female head, the internal thread of the conversion female head is connected with a grouting connector, a conversion male head is inserted at the side of the conversion female head away from the docking joint, a high-pressure grouting hose is arranged inside the conversion male head, both ends of the high-pressure grouting hose are fixed with grouting adapters, the end of the grouting adapter away from one end of the high-pressure grouting hose is provided with a slurry stop valve, the grouting adapter close to one end of the high-pressure grouting hose is arranged inside the conversion male head, the grouting adapter is communicated with the inside of the grouting connector, the end of the conversion male head away from the conversion female head is threadedly connected with a push rod, the high-pressure grouting hose runs through the inside of the push rod, a slurry stop plug is sleeved on the outside of the conversion female head, and an exhaust hole is opened inside the slurry stop plug.

[0008] Preferably, a limiting ring is fixed on the outside of the grouting connector near one end of the grouting adapter, a movable cavity is opened inside the grouting adapter, a fixing frame is arranged inside the movable cavity, a first spring is fixed at the top of the fixing frame, the top of the first spring is fixedly connected to the inner wall of the movable cavity, a clamping block is fixed at the bottom of one end of the fixing frame near the limiting ring, and six groups of clamping blocks are arranged inside the grouting adapter.

[0009] Preferably, a docking groove is provided at one end of the grouting adapter close to the grouting connector, and a sealing gasket is provided inside the docking groove.

[0010] Preferably, a rotating block is rotatably connected inside the grouting adapter, a rotating plate is fixed to one side of the rotating block close to the clamping block, and a protrusion is fixed to the top of the fixing frame below the rotating plate.

[0011] Preferably, a gear is fixed to the end of the rotating shaft of the rotating block, and a second rack is meshingly connected to the side of the gear close to the clamping block. An extrusion block is fixed to the top of the second rack, and the extrusion block is arranged on the outside of the grouting adapter. A coil spring is fixed to the outside of the rotating shaft of the rotating block, and the outside of the coil spring is fixedly connected to the grouting adapter.

[0012] Preferably, an inner inclined surface is provided on a side of the clamping block close to the first spring.

[0013] Preferably, the inside of the grouting adapter is rotatably connected with two symmetrically arranged material baffle plates, and limiting blocks are fixed on both sides of the inside of the grouting adapter.

[0014] Preferably, a rotating rod is fixed to the top of the baffle plate, teeth are provided on one side of the rotating rod, one side of the teeth is meshingly connected with a first rack, a telescopic rod is fixed to the side of the first rack away from the rotating rod, the telescopic rod is movably connected to the inside of the grouting adapter, a second spring is fixed to one end of the telescopic rod close to the first rack, the other end of the second spring is fixedly connected to the grouting adapter, a push rack is fixed to the other end of the telescopic rod, a pull rod is fixed to the top of the rotating rod, and the pull rod is arranged on the outside of the grouting adapter.

[0015] A modular grouting method suitable for tunnel cave treatment comprises the following steps:

[0016] Material selection: Determine the length and quantity of the required pipe shed steel pipes and the required length of the push rod according to the calculated distance to be pushed;

[0017] Pipe-roof drilling: Calculate the distance that the pipe-roof needs to be advanced according to the site requirements, use the pipe-roof drilling rig to drill into the soil, and drill the required distance;

[0018] Installation components: connect the pipe-roof steel pipes to be pushed through the docking seat and the docking joint, connect the docking joint of the last section of the pipe-roof steel pipe with the female adapter, connect the rear end of the push rod with the output end of the pipe-roof drilling rig, connect the front end of the push rod with the male adapter, then install the grouting connector inside the female adapter, pass the high-pressure grouting hose through the push rod and the male adapter, and connect it to the grouting connector through the grouting adapter to make the high-pressure grouting hose communicate with the inside of the pipe-roof steel pipe;

[0019] Pipe-roof advancement: Start the pipe-roof drilling rig and use the advancement rod to drive the pipe-roof steel pipe into the soil of the tunnel cave;

[0020] Grouting: Separate the pipe-roof drilling rig from the push rod, then connect the other end of the high-pressure grouting hose to the grouting stop valve using a grouting adapter, and connect the other end of the grouting stop valve to a high-pressure grouting machine, and use the grouting machine to grout the pipe-roof steel pipe;

[0021] Disassembly components: After grouting, separate the male adapter from the female adapter, and at the same time separate the grouting connector from the grouting adapter.

[0022] The connection of the grouting adapter and the grouting connector described in the installation assembly includes the following steps:

[0023] S1. Align the front end of the grouting adapter with the rear end of the grouting connector, and push the grouting adapter close to the grouting connector;

[0024] S2. Hook the limit ring through the fixing frame to fix the grouting adapter and the grouting connector;

[0025] S3, during the movement of the limit ring, the push frame is pushed, driving the baffle plate to rotate so that the inside of the grouting adapter is opened;

[0026] S4. Insert the male adapter into the female adapter, and press the extrusion block through the inner wall of the male adapter. The extrusion block drives the fixing frame to tighten the limit ring.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The modular grouting device and method suitable for tunnel cave treatment described in the present invention is to pre-drill a hole by a pipe-roof drilling rig, then use the pipe-roof drilling rig to push the pipe-roof steel pipe into the hole, and then connect the high-pressure grouting hose through a slurry stop valve. The grouting machine inputs slurry into the inside of the pipe-roof steel pipe through the high-pressure grouting hose. The pipe-roof steel pipe is retained in the soil to cooperate with the injected slurry to form a pipe roof, which can avoid local collapse of the cave caused by taking out the pipe-roof steel pipe after grouting.

[0029] 2. The modular grouting device and method suitable for tunnel cave treatment described in the present invention can fix the grouting connector and the grouting adapter by using a clamping block to clamp the limit ring through the fixed frame, and at the same time the material baffle plate is flipped to coordinate the connection and separation of the grouting connector and the grouting adapter to switch the on and off of the grouting adapter, so as to retain the uninjected slurry in the grouting adapter for the next grouting, which can save a certain amount of cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 is a stereogram of the present invention;

[0032] Figure 2 It is a schematic diagram of the steel pipe structure of the pipe shed in the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the high-pressure grouting hose in the present invention;

[0034] Figure 4 It is a schematic diagram of the internal structure of the female adapter in the present invention;

[0035] Figure 5 It is a schematic diagram of the grouting adapter structure in the present invention;

[0036] Figure 6 It is a schematic diagram of the internal structure of the grouting adapter in the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the fixing frame in the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the baffle plate in the present invention.

[0039] In the figure: 1, steel pipe of pipe shed; 11, docking seat; 12, docking joint; 2, push rod; 3, grout stop valve; 31, high pressure grouting hose; 32, grouting adapter; 321, movable cavity; 322, limit block; 33, fixing frame; 331, clamping block; 332, inner inclined surface; 333, first spring; 334, convex block; 34, material blocking plate; 341, rotating rod; 342, pull rod; 343, teeth; 34 4. First rack; 345. Second spring; 346. Telescopic rod; 347. Push frame; 35. Extrusion block; 351. Second rack; 352. Rotating block; 353. Rotating plate; 354. Gear; 355. Coil spring; 36. Docking groove; 361. Sealing gasket; 4. Adapter female connector; 41. Grouting stop plug; 411. Exhaust hole; 42. Adapter male connector; 43. Grouting connector; 431. Limiting ring. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] like Figures 1 to 4 As shown, a modular grouting device suitable for tunnel cave treatment described in an embodiment of the present invention includes a pipe-roof steel pipe 1, a docking seat 11 is provided at one end of the pipe-roof steel pipe 1, a docking joint 12 is fixed at the other end of the pipe-roof steel pipe 1, the docking seat 11 can be threadedly connected with the docking joint 12, the external thread of the docking joint 12 is connected with a female adapter 4, the internal thread of the female adapter 4 is connected with a grouting connector 43, a male adapter 42 is inserted at one side of the female adapter 4 away from the docking joint 12, a high-pressure grouting hose 31 is provided inside the male adapter 42, and the high-pressure grouting hose 31 is provided inside. A grouting adapter 32 is fixed at both ends of the high-pressure grouting hose 31, a grouting stop valve 3 is installed at the end of the grouting adapter 32 away from the adapter female head 4, the grouting adapter 32 at the end of the high-pressure grouting hose 31 close to the adapter female head 4 is arranged inside the adapter male head 42, the grouting adapter 32 is connected to the inside of the grouting connector 43, the end of the adapter male head 42 away from the adapter female head 4 is threadedly connected with the push rod 2, the high-pressure grouting hose 31 runs through the inside of the push rod 2, the outside of the adapter female head 4 is provided with a grouting stop plug 41, and the inside of the grouting stop plug 41 is provided with an exhaust hole 411;

[0042] When constructing a tunnel, you may encounter a cave. At this time, in order to ensure the stability of the tunnel, the location of the cave needs to be reinforced. Therefore, it is necessary to build a pipe shed and grouting at the location of the cave. At this time, calculate the distance that the pipe shed needs to be advanced, and then use the pipe shed drilling rig to drill holes at the location of the cave. Then, select the pipe shed steel pipe 1 of corresponding length and quantity according to the distance required to be advanced, connect the pipe shed steel pipe 1 end to end through the docking seat 11 and the docking joint 12, connect the docking joint 12 of the last section of the pipe shed steel pipe 1 with the adapter female head 4, connect the rear end of the push rod 2 with the output end of the pipe shed drilling rig, connect the front end of the push rod 2 with the adapter male head 42, and then install the grouting connector 43 inside the adapter female head 4, pass the high-pressure grouting hose 31 through the push rod 2 and the adapter male head 42, and connect it to the grouting connector 43 through the grouting adapter 32 to make the high-pressure grouting hose 31 connected to the inside of the pipe shed steel pipe 1. At this time, the push rod 2 is pushed by the pipe shed drilling rig to drive the pipe The canopy steel pipe 1 is pushed into the hole. When the canopy steel pipe 1 is pushed into the appropriate position, the pushing rod 2 is separated from the canopy drilling rig, and then the high-pressure grouting hose 31 is connected to the stop valve 3. The stop valve 3 is connected to the grouting machine. The stop valve 3 and the grouting machine are opened, and the slurry is injected into the canopy steel pipe 1 through the stop valve 3. At this time, the canopy steel pipe 1 can inject the slurry into the soil around it. At the same time, the canopy steel pipe 1 is retained in the soil to further reinforce the soil. The stop plug 41 can seal the outside of the female head 4 to prevent the slurry from overflowing. The exhaust hole 411 can discharge the air inside the hole when the slurry is injected. A one-way valve is arranged inside the grouting connector 43, which can automatically close after the grouting is stopped. The above steps are used to push multiple canopy steel pipes 1 and grout them, so that multiple canopy steel pipes 1 form a canopy. The tunnel cave position can be reinforced through the canopy, and there is no need to take out the canopy steel pipe 1, thereby reducing the occurrence of collapse of part of the cave area when taking it out.

[0043] like Figures 4 to 7 As shown, a limiting ring 431 is fixed to the outside of the grouting connector 43 near one end of the grouting adapter 32, an active cavity 321 is provided inside the grouting adapter 32, a fixing frame 33 is provided inside the active cavity 321, a first spring 333 is fixed to the top of the fixing frame 33, the top of the first spring 333 is fixedly connected to the inner side wall of the active cavity 321, a clamping block 331 is fixed to the bottom of one end of the fixing frame 33 near the limiting ring 431, and six groups of clamping blocks 331 are provided inside the grouting adapter 32;

[0044] The clamping block 331 is pushed up by the limiting ring 431 to push the clamping block 331 up through its outer inclined surface. When the clamping block 331 passes through the limiting ring 431, the elastic force of the first spring 333 pushes the fixing frame 33 to drive the clamping block 331 to move downward. At this time, the clamping block 331 can fall and be stuck on the outside of the limiting ring 431. At this time, under the action of the clamping block 331 and the limiting ring 431, the grouting connector 43 and the grouting adapter 32 can be initially fixed. The fixing frame 33 is provided with six limiting rings 431 at equal intervals in annular shape, so that the fixing between the fixing frame 33 and the limiting ring 431 does not need a fixed angle, which is more convenient for installation.

[0045] like Figures 4 to 7 As shown, a docking groove 36 is provided at one end of the grouting adapter 32 close to the grouting connector 43, and a sealing gasket 361 is provided inside the docking groove 36;

[0046] When the grouting connector 43 and the grouting adapter 32 are docked, the end of the grouting connector 43 will be inserted into the docking groove 36. At this time, the sealing gasket 361 is placed between the grouting connector 43 and the docking groove 36 to seal the connection and prevent leakage during the grouting process.

[0047] like Figures 4 to 7 As shown, the grouting adapter 32 is internally rotatably connected with a rotating block 352, a rotating plate 353 is fixed to one side of the rotating block 352 close to the clamping block 331, and a protrusion 334 is fixed to the top of the fixing frame 33 below the rotating plate 353;

[0048] After the clamping block 331 is initially fixed on the outside of the limiting ring 431, the rotating block 352 rotates to drive the rotating plate 353 to flip. At this time, the rotating plate 353 presses the fixing frame 33 downward, and the fixing frame 33 is pressed closer to the limiting ring 431. At the same time, the rotating plate 353 moves the protrusion 334, and the protrusion 334 pulls the fixing frame 33 into the movable cavity 321. At this time, the fixing frame 33 drives the clamping block 331 to pull the limiting ring 431. At this time, the limiting ring 431 is in a fixed state, so that the grouting adapter 32 is closer to the grouting connector 43, and the grouting connector 43 is closer to the sealing gasket 361, which can make the connection sealing between the grouting connector 43 and the grouting adapter 32 better.

[0049] like Figures 4 to 7As shown, a gear 354 is fixed to the end of the rotating shaft of the rotating block 352, and a second rack 351 is meshedly connected to the side of the gear 354 close to the clamping block 331. An extrusion block 35 is fixed to the top of the second rack 351. The extrusion block 35 is arranged on the outside of the grouting adapter 32. A coil spring 355 is fixed to the outside of the rotating shaft of the rotating block 352, and the outside of the coil spring 355 is fixedly connected to the grouting adapter 32.

[0050] After the clamping block 331 is clamped on the outside of the limiting ring 431, the adapter male head 42 can be inserted into the inside of the adapter female head 4. During the insertion process, the inner side of the adapter male head 42 pushes the inclined surface of the extrusion block 35. At this time, the extrusion block 35 pushes the second rack 351 downward. The downward movement of the second rack 351 can drive the gear 354 to rotate. The gear 354 drives the rotating block 352 to rotate, so that the rotating block 352 can rotate, and the coil spring 355 is driven to tighten. At this time, the fixing frame 33 can pull the clamping block 331 to tighten the grouting connector 43 and the grouting adapter 32. At the same time, when the adapter male head 42 is placed in the inside of the adapter female head 4, the position of the extrusion block 35 remains fixed, and the fixation of the clamping block 331 and the limiting ring 431 can be self-locked to maintain the stability of the fixation between the grouting adapter 32 and the grouting connector 43.

[0051] like Figures 4 to 7 As shown, an inner inclined surface 332 is formed on one side of the clamping block 331 close to the first spring 333;

[0052] After use, the grouting connector 43 and the grouting adapter 32 need to be separated. At this time, the adapter male head 42 is pulled out from the inside of the adapter female head 4, and the extrusion block 35 loses the external fixing force. The coil spring 355 drives the gear 354 and the gear 354 to rotate in the opposite direction. At this time, the gear 354 drives the second rack 351 to move upward, so that the second rack 351 can drive the extrusion block 35 to reset. At the same time, the rotating block 352 drives the rotating plate 353 to rotate in the opposite direction to reset. Then the elastic force of the first spring 333 will move the fixing frame 33 upward. By pulling, the fixing frame 33 can be reset. At this time, the block 331 and the limiting ring 431 are in a preliminary fixed state. At this time, the surface of the inner bevel 332 is in contact with the limiting ring 431. Pulling the high-pressure grouting hose 31 drives the grouting adapter 32 to move, and the grouting adapter 32 drives the fixing frame 33 to move. Under the guidance of the inner bevel 332, the block 331 can be pushed up by the limiting ring 431, and then the limiting ring 431 can be separated from the block 331, which can make it easier to separate the grouting connector 43 and the grouting adapter 32.

[0053] like Figures 6 to 8 As shown, the grouting adapter 32 is internally rotatably connected to two symmetrically arranged baffle plates 34, and both sides of the grouting adapter 32 are fixed with limit blocks 322;

[0054] After the grouting adapter 32 and the grouting connector 43 are docked, the two baffle plates 34 rotate inside the grouting adapter 32. At this time, the inside of the grouting adapter 32 is opened, and slurry can be input into the grouting connector 43 through the grouting adapter 32. When the grouting adapter 32 is separated from the grouting connector 43, the two baffle plates 34 are flipped in the opposite direction to seal the inside of the grouting adapter 32, so that the slurry inside the high-pressure grouting hose 31 can be retained therein and can continue to be used for the next grouting, reducing the waste of slurry. The limit block 322 can limit the baffle plate 34 to prevent it from flipping over at too large an angle.

[0055] like Figures 6 to 8 As shown, a rotating rod 341 is fixed to the top of the baffle plate 34, and a tooth 343 is provided on one side of the rotating rod 341, and a first rack 344 is meshedly connected to one side of the tooth 343, and a telescopic rod 346 is fixed to the side of the first rack 344 away from the rotating rod 341, and the telescopic rod 346 is movably connected to the inside of the grouting adapter 32, and a second spring 345 is fixed to one end of the telescopic rod 346 close to the first rack 344, and the other end of the second spring 345 is fixedly connected to the grouting adapter 32, and a push frame 347 is fixed to the other end of the telescopic rod 346, and a pull rod 342 is fixed to the top of the rotating rod 341, and the pull rod 342 is arranged on the outside of the grouting adapter 32;

[0056] When the grouting connector 43 is close to the grouting adapter 32, the limiting ring 431 will approach the pushing frame 347, and then the limiting ring 431 will push the pushing frame 347 to drive the telescopic rod 346, and the telescopic rod 346 will drive the first rack 344, and the first rack 344 can drive the rotating rod 341 to rotate through the teeth 343. At this time, the rotating rod 341 can drive the baffle plate 34 to open. When the grouting connector 43 is separated from the grouting adapter 32, the pushing frame 347 loses its fixing force. At this time, the second spring 345 pushes The movable telescopic rod 346 drives the first rack 344 to move in the opposite direction, and the first rack 344 drives the rotating rod 341 to rotate in the opposite direction through the teeth 343. At this time, the rotating rod 341 drives the baffle plate 34 to reset and automatically seal the inside of the grouting adapter 32. When the inside of the high-pressure grouting hose 31 needs to be cleaned after the grouting is completed, the baffle plate 34 needs to be opened. At this time, manually pulling the pull rod 342 can drive the baffle plate 34 to flip through the rotating rod 341, so that the inside of the grouting adapter 32 is opened for easy cleaning.

[0057] A modular grouting method suitable for tunnel cave treatment comprises the following steps:

[0058] Material selection: Determine the required length and quantity of the pipe shed steel pipes 1 and the required length of the push rod 2 according to the calculated distance to be pushed;

[0059] Pipe-roof drilling: Calculate the distance that the pipe-roof needs to be advanced according to the site requirements, use the pipe-roof drilling rig to drill into the soil, and drill the required distance;

[0060] Installation components: connect the pipe-roof steel pipe 1 to be pushed through the docking seat 11 and the docking joint 12, connect the docking joint 12 of the last section of the pipe-roof steel pipe 1 with the adapter female head 4, connect the rear end of the push rod 2 with the output end of the pipe-roof drilling rig, connect the front end of the push rod 2 with the adapter male head 42, then install the grouting connector 43 inside the adapter female head 4, pass the high-pressure grouting hose 31 through the push rod 2 and the adapter male head 42, and connect it to the grouting connector 43 through the grouting adapter 32 to make the high-pressure grouting hose 31 communicate with the inside of the pipe-roof steel pipe 1;

[0061] Pipe-roof advancement: Start the pipe-roof drilling rig and use the advancement rod 2 to drive the pipe-roof steel pipe 1 into the tunnel cave soil;

[0062] Grouting: Separate the pipe-roof drilling rig from the push rod 2, then connect the other end of the high-pressure grouting hose 31 to the grouting stop valve 3 using the grouting adapter 32, and connect the other end of the grouting stop valve 3 to the high-pressure grouting machine, and use the grouting machine to grout the pipe-roof steel pipe 1;

[0063] Disassembling components: After grouting, separate the male adapter 42 from the female adapter 4, and at the same time separate the grouting connector 43 from the grouting adapter 32.

[0064] The connection of the grouting adapter 32 and the grouting connector 43 described in the installation assembly includes the following steps:

[0065] S1, align the front end of the grouting adapter 32 with the rear end of the grouting connector 43, and push the grouting adapter 32 to fit closely against the grouting connector 43;

[0066] S2, hook the limiting ring 431 through the fixing frame 33 to fix the grouting adapter 32 and the grouting connector 43;

[0067] S3, during the movement of the limit ring 431, the push frame 347 is pushed, driving the baffle plate 34 to rotate so that the inside of the grouting adapter 32 is opened;

[0068] S4. The adapter male connector 42 is inserted into the adapter female connector 4. The inner wall of the adapter male connector 42 compresses the extrusion block 35. The extrusion block 35 drives the fixing frame 33 to tighten the limiting ring 431.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A modular grouting device suitable for tunnel cave treatment, characterized in that: The invention comprises a pipe-roof steel pipe (1), wherein a docking seat (11) is arranged at one end of the pipe-roof steel pipe (1), a docking joint (12) is fixed at the other end of the pipe-roof steel pipe (1), the docking seat (11) can be threadedly connected to the docking joint (12), an external thread of the docking joint (12) is connected to a female adapter (4), an internal thread of the female adapter (4) is connected to a grouting connector (43), a male adapter (42) is inserted into the side of the female adapter (4) away from the docking joint (12), a high-pressure grouting hose (31) is arranged inside the male adapter (42), and grouting adapters (32) are fixed at both ends of the high-pressure grouting hose (31), and a high-pressure grouting hose (31) is provided with a plurality of grouting adapters (32). A grouting stop valve (3) is installed at the end of the grouting adapter (32) of the grouting hose (31) away from the adapter female head (4); the grouting adapter (32) at the end of the high-pressure grouting hose (31) close to the adapter female head (4) is arranged inside the adapter male head (42); the grouting adapter (32) is connected to the inside of the grouting connector (43); the end of the adapter male head (42) away from the adapter female head (4) is threadedly connected to the push rod (2); the high-pressure grouting hose (31) passes through the inside of the push rod (2); a grouting stop plug (41) is sleeved on the outside of the adapter female head (4); and an exhaust hole (411) is provided inside the grouting stop plug (41).

2. A modular grouting device suitable for tunnel cave treatment according to claim 1, characterized in that: A limiting ring (431) is fixed to the outside of the grouting connector (43) near one end of the grouting adapter (32); an active cavity (321) is provided inside the grouting adapter (32); a fixing frame (33) is provided inside the active cavity (321); a first spring (333) is fixed to the top end of the fixing frame (33); the top end of the first spring (333) is fixedly connected to the inner wall of the active cavity (321); a clamping block (331) is fixed to the bottom of one end of the fixing frame (33) near the limiting ring (431); six groups of clamping blocks (331) are provided inside the grouting adapter (32).

3. A modular grouting device suitable for tunnel cave treatment according to claim 2, characterized in that: A docking groove (36) is provided at one end of the grouting adapter (32) close to the grouting connector (43), and a sealing gasket (361) is provided inside the docking groove (36).

4. A modular grouting device suitable for tunnel cave treatment according to claim 3, characterized in that: The grouting adapter (32) is internally rotatably connected with a rotating block (352), a rotating plate (353) is fixed to one side of the rotating block (352) close to the clamping block (331), and a protrusion (334) is fixed to the top of the fixing frame (33) below the rotating plate (353).

5. A modular grouting device suitable for tunnel cave treatment according to claim 4, characterized in that: A gear (354) is fixed to the end of the rotating shaft of the rotating block (352); a second rack (351) is meshedly connected to the side of the gear (354) close to the clamping block (331); an extrusion block (35) is fixed to the top of the second rack (351); the extrusion block (35) is arranged on the outside of the grouting adapter (32); a coil spring (355) is fixed to the outside of the rotating shaft of the rotating block (352); and the outside of the coil spring (355) is fixedly connected to the grouting adapter (32).

6. A modular grouting device suitable for tunnel cave treatment according to claim 2, characterized in that: An inner inclined surface (332) is formed on one side of the clamping block (331) close to the first spring (333).

7. A modular grouting device suitable for tunnel cave treatment according to claim 1, characterized in that: Two symmetrically arranged material blocking plates (34) are rotatably connected inside the grouting adapter (32), and limiting blocks (322) are fixed on both sides inside the grouting adapter (32).

8. A modular grouting device suitable for tunnel cave treatment according to claim 7, characterized in that: A rotating rod (341) is fixed to the top of the baffle plate (34), and teeth (343) are provided on one side of the rotating rod (341). One side of the teeth (343) is meshedly connected with a first rack (344). A telescopic rod (346) is fixed on the side of the first rack (344) away from the rotating rod (341). The telescopic rod (346) is movably connected to the inside of the grouting adapter (32). A second spring (345) is fixed to one end of the telescopic rod (346) close to the first rack (344). The other end of the second spring (345) is fixedly connected to the grouting adapter (32). A push frame (347) is fixed to the other end of the telescopic rod (346). A pull rod (342) is fixed to the top of the rotating rod (341). The pull rod (342) is provided on the outside of the grouting adapter (32).

9. A modular grouting method suitable for tunnel cave treatment, using the modular grouting device for tunnel cave treatment according to any one of claims 1 to 8 for grouting, characterized in that: The grouting method comprises the following steps: Select materials: determine the required length and quantity of the pipe rack steel pipes (1) and the required length of the push rod (2) according to the calculated distance to be pushed; Pipe-roof drilling: Calculate the distance that the pipe-roof needs to be advanced according to the site requirements, use the pipe-roof drilling rig to drill into the soil, and drill the required distance; Installation assembly: connect the pipe-roof steel pipe (1) to be pushed through the docking seat (11) and the docking joint (12), connect the docking joint (12) of the last section of the pipe-roof steel pipe (1) with the adapter female head (4), connect the rear end of the push rod (2) with the output end of the pipe-roof drilling rig, connect the front end of the push rod (2) with the adapter male head (42), then install the grouting connector (43) inside the adapter female head (4), pass the high-pressure grouting hose (31) through the push rod (2) and the adapter male head (42), and connect it to the grouting connector (43) through the grouting adapter (32) so that the high-pressure grouting hose (31) is connected to the inside of the pipe-roof steel pipe (1); Pipe-roof advancement: starting the pipe-roof drilling machine to drive the pipe-roof steel pipe (1) through the advancement rod (2) to advance it into the tunnel cave soil; Grouting: Separate the pipe-roof drilling machine from the push rod (2), then connect the other end of the high-pressure grouting hose (31) to the grouting stop valve (3) using a grouting adapter (32), connect the other end of the grouting stop valve (3) to a high-pressure grouting machine, and use the grouting machine to grout the pipe-roof steel pipe (1); Disassembling the assembly: After grouting, the male adapter (42) is separated from the female adapter (4), and at the same time, the grouting connector (43) is separated from the grouting adapter (32).

10. A modular grouting method suitable for tunnel cave treatment according to claim 9, characterized in that: The connection of the grouting adapter (32) and the grouting connector (43) in the installation assembly comprises the following steps: S1, aligning the front end of the grouting adapter (32) with the rear end of the grouting connector (43), and pushing the grouting adapter (32) to fit closely against the grouting connector (43); S2, hooking the limiting ring (431) through the fixing frame (33) to fix the grouting adapter (32) and the grouting connector (43); S3, the limiting ring (431) pushes the push frame (347) during the movement, driving the blocking plate (34) to rotate so that the inside of the grouting adapter (32) is opened; S4, the adapter male connector (42) is inserted into the adapter female connector (4), and the extrusion block (35) is pressed against the inner wall of the adapter male connector (42), and the extrusion block (35) drives the fixing frame (33) to tighten the limiting ring (431).

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