Construction grouting equipment and grouting method for underground excavation of subway station

Abstract

The invention relates to the technical field of construction grouting, and discloses construction grouting equipment for underground excavation of a subway station and a grouting method.The construction grouting equipment for underground excavation of the subway station comprises a pump body, a switching component arranged in a grouting pipe and grout discharging components arranged on the switching component in an array mode, and each grout discharging component comprises a circulation assembly and a drainage component and rotates in a contact cylinder through a contact block and drives a switching rod; when the plurality of slurry discharging pipes extend out of the grouting pipe for operation, the driving pump body pumps slurry to the slurry discharging pipes and discharges the slurry, when the plurality of slurry discharging pipes retract into the grouting pipe, the tip cones and the rubber blocks seal ports of the slurry discharging pipes, the circulating pipe communicates with the fixed pipe, and meanwhile clear water can circulate to the slurry discharging pipes from the driving pump body under the action of the driving pump body. The driving pump body can automatically guide clear water into a pipeline through which slurry flows, and flushes residual slurry in the pipeline, so that the situation that the grouting equipment is damaged due to solidification of the residual slurry in the grouting equipment due to negligence of constructors or incapability of cleaning is avoided, and the construction progress of underground excavation of a subway is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of construction grouting, in particular to construction grouting equipment and a grouting method for underground tunneling of a subway station. Background Art

[0002] During the underground excavation of the subway, the bearing capacity of the stratum itself is limited. After the tunnel is excavated, the surrounding soil is difficult to withstand the pressure of the upper soil and is prone to deformation. By injecting slurry into the pores of the stratum, the bonding force between soil particles or rock cracks is enhanced, the bearing capacity of the stratum is improved, and a stable working environment is provided for tunnel excavation and subsequent support structure construction;

[0003] However, during the underground excavation of the subway, if there is a sudden groundwater leakage during the tunnel excavation process, the construction workers need to urgently grout to stop the water. After the grouting is completed, due to the actual needs of the on-site construction, the construction workers need to immediately engage in other reinforcement work after the grouting is completed, resulting in insufficient time for the construction workers to clean the grouting equipment after use. In addition, the underground excavation of the subway has high work intensity, and the construction workers will feel physically and mentally exhausted under the high work intensity, and then forget to clean the grouting equipment after the grouting is completed;

[0004] Since the slurry discharged from the grouting equipment will solidify after a certain period of time, and some slurry will remain inside the grouting equipment after use, if the grouting equipment is not cleaned in time after use, the slurry remaining inside the grouting equipment will solidify, thereby clogging the grouting equipment and causing damage to the grouting equipment, affecting the next use and the progress of the subway excavation construction. Summary of the invention

[0005] The object of the present invention is to provide a construction grouting device and a grouting method for underground excavation of a subway station, so as to solve the problems mentioned in the above process.

[0006] To achieve the above object, the present invention provides the following technical solution: a construction grouting equipment for underground excavation of a subway station, comprising a pump body, a frame body arranged on the pump body, a grouting pipe arranged on the frame body, a switching component arranged in the grouting pipe, and a grouting component arranged in an array on the switching component.

[0007] The switching component is used to drive the pulp discharge component to shift.

[0008] The slurry discharge component includes a circulation component and a drainage component, and the drainage component includes a fixed plate, a fixed pipe arranged on the fixed plate, a connecting pipe arranged on the fixed pipe, a connecting groove arranged on the connecting pipe, a sphere 1 arranged in the connecting pipe, a sealing plate arranged on the sphere 1, an inner plate arranged in the connecting pipe, a connecting tube 1 arranged on the inner plate, and a connecting tube 2 arranged on the connecting tube 1.

[0009] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, the liquid inlet boxes are arranged in an array in the grouting pipe, the liquid inlet pipes are arranged in an array on the liquid inlet boxes, the liquid outlet boxes are arranged on the liquid inlet boxes, and the liquid outlet pipes are arranged in an array on the liquid outlet boxes.

[0010] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, the slurry discharge component also includes a slurry discharge pipe, an air pressure cylinder arranged on the slurry discharge pipe, a movable block arranged in the air pressure cylinder, and an air pressure ring arranged in the air pressure cylinder.

[0011] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, it comprises: a moving cylinder arranged in the air pressure ring, a top cone arranged on the moving cylinder, and a rubber block arranged on the top cone.

[0012] As a preferred solution of the construction grouting equipment for underground excavation in the subway station described in the present invention, the circulation component includes a circulation pipe, a circulation cylinder arranged in the circulation pipe, a connecting cylinder three arranged in the circulation cylinder, a connecting cylinder four arranged in the connecting cylinder three, and a sphere two arranged on the connecting cylinder four.

[0013] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, the switching component includes a contact cylinder, a contact block arranged in the contact cylinder, a guide block symmetrically arranged on the contact block, and a guide groove symmetrically arranged in the contact cylinder.

[0014] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, it comprises: a switching rod arranged on the contact block, a switching plate arranged in an array on the switching rod, a rotating plate arranged on the switching plate, a movable rod arranged in an array on the switching plate, and a mounting seat arranged on the movable rod.

[0015] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, the switching tube is arranged on the switching rod, the switching groove is arranged on the switching tube, and the liquid storage tank is arranged on the pump body.

[0016] As a preferred solution of the construction grouting equipment for underground excavation of subway stations described in the present invention, it comprises: a partition disposed in the liquid storage tank, a partition tube disposed on the partition, and a partition groove symmetrically disposed on the partition tube.

[0017] To achieve the above object, the present invention provides the following technical solution: a grouting method for construction grouting equipment for underground excavation of subway stations, comprising the following grouting method:

[0018] First, a grouting hole is opened on the soil, and then the pump body is pushed so that the grouting pipe is gradually inserted into the grouting hole. When the cover body contacts the soil at the bottom of the grouting hole, the cover body is blocked by the soil, and then the contact block rotates and moves toward the grouting pipe. The guide block slides in the guide groove, and the spring 4 is deformed. At this time, the switching rod rotates;

[0019] The rotating plate rotates synchronously with the switching rod, and the sliding shaft slides along the inferior arc groove, so that the movable rod slides along the sliding groove. At this time, multiple movable rods move away from each other, and the mounting seat drives the grouting pipe thereon to extend out of the grouting groove and into the grouting pipe;

[0020] When the movable block contacts the inner wall of the grouting pipe, as the grouting pipe continues to shift, the movable block will squeeze the gas in the air pressure chamber. At this time, the movable cylinder will shift under the action of the gas pressure, the spring will deform, and at the same time, the movable cylinder will drive the rubber block to gradually move away from the port of the grouting pipe.

[0021] At the same time, the switching rod drives the switching tube to rotate, so that the switching groove on the switching tube rotates to coincide with the separation groove close to the material chamber. At this time, the slurry in the material chamber will pass through the separation groove and the switching groove switching tube;

[0022] The driving pump body is started, and the slurry entering the switching pipe enters the driving pump body and is discharged into the liquid inlet box through the liquid outlet end of the driving pump body, and finally discharged into the soil through the slurry discharge pipe;

[0023] When grouting is completed, the grouting pipe is withdrawn from the grouting hole, and the spring 4 is reset. The switching rod drives the switching pipe to rotate, the rotating plate rotates, and the multiple movable rods approach each other. The grouting pipe gradually shrinks into the grouting pipe, and the movable block is reset by the air pressure. The rubber block will shift synchronously and block the port of the grouting pipe.

[0024] At the same time, the flow pipe will shift into the connecting groove, the ball one will gradually move away from the ball groove one, and the ball two will gradually move away from the ball groove two;

[0025] At the same time, the switching rod drives the switching tube to rotate, and the switching groove rotates to coincide with the dividing groove close to the clean water chamber. Then the clean water in the cleaning chamber enters the switching tube from the dividing groove and the switching groove, and enters the liquid inlet box through the driving pump body, and then enters the slurry discharge pipe, and then enters the fixed pipe from the slurry discharge pipe, and then enters the liquid outlet box from the fixed pipe, and finally enters the recovery tank through the liquid outlet box.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The contact block rotates in the contact cylinder and drives the switching rod, so that multiple grouting pipes extend out of the grouting pipe for operation. At this time, the driving pump body can pump the slurry into the grouting pipe and discharge it. When multiple grouting pipes shrink into the grouting pipe, the top cone and the rubber block block the grouting pipe port, and the flow pipe and the fixed pipe are interconnected. At the same time, clean water can be circulated from the driving pump body to the grouting pipe under the action of the driving pump body, and circulated to the recovery tank for collection. Therefore, after the grouting operation is completed, the driving pump body can automatically introduce clean water into the pipeline where the slurry circulates, and flush the residual slurry inside the pipeline, avoiding the solidification of the residual slurry inside the grouting equipment due to negligence or insufficient cleaning by the construction personnel, resulting in damage to the grouting equipment, and ensuring the construction progress of the subway excavation;

[0028] 2. When the grouting pipe is extended, the grouting pipe will continue to extend toward the soil for a certain distance, and use the top cone to scrape the inside of the soil, thereby destroying the smoothness of the inner wall of the grouting hole, avoiding the slurry from being retained on the smooth soil surface, allowing the slurry to be better mixed in the soil, and improving the mixing effect of the slurry and the soil;

[0029] 3. The slurry discharged from the slurry discharge pipe port is blocked by rubber blocks, so that the slurry splashes around after contacting the rubber blocks, avoiding excessive water pressure and excessive concentration of the flow direction of the water discharged from the slurry discharge pipe, causing the sprayed slurry to disperse the soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the grouting equipment for underground excavation of a subway station according to the present invention.

[0031] Figure 2 It is a schematic structural diagram of the partial explosion of the construction grouting equipment for underground excavation of the subway station according to the present invention.

[0032] Figure 3 It is a structural schematic diagram of the grouting components of the construction grouting equipment for underground excavation of subway stations of the present invention.

[0033] Figure 4 It is a structural schematic diagram of the partial explosion of the grouting parts of the construction grouting equipment for underground excavation of the subway station according to the present invention.

[0034] Figure 5 It is a schematic structural diagram of the fixed pipes and the connecting pipes of the construction grouting equipment for underground excavation of a subway station according to the present invention.

[0035] Figure 6 It is a structural schematic diagram of a half-section view of a flow pipe of a construction grouting equipment for underground excavation of a subway station according to the present invention.

[0036] Figure 7It is a structural schematic diagram of a half-section view of a grouting pipe of a grouting equipment for underground excavation of a subway station according to the present invention.

[0037] Figure 8 It is a schematic structural diagram of a half-section view of a drainage component of a grouting equipment for underground excavation of a subway station according to the present invention.

[0038] Fig. 9 It is a structural schematic diagram of the contact cylinder and contact block of the construction grouting equipment for underground excavation of subway stations of the present invention.

[0039] Fig.10 It is a structural schematic diagram of the transfer plate and the switching plate of the construction grouting equipment for underground excavation of a subway station according to the present invention.

[0040] Fig.11 It is a structural schematic diagram of a partial cross-section of a liquid storage tank of a construction grouting equipment for underground excavation of a subway station according to the present invention.

[0041] In the figure:

[0042] 1. Pump body; 11. Frame; 12. Grouting pipe;

[0043] 2. Switching component; 21. Contact cylinder; 211. Guide groove; 22. Contact block; 23. Guide block; 24. Switching rod; 25. Switching plate; 251. Movable rod; 252. Mounting seat; 26. Turning plate; 27. Switching tube; 271. Switching groove; 28. Liquid storage tank; 281. Partition plate; 29. ​​Separation tube; 291. Separation groove;

[0044] 3. Slurry discharge component; 31. Circulation assembly; 311. Circulation pipe; 312. Circulation cylinder; 313. Connection cylinder three; 314. Connection cylinder four; 315. Sphere two; 32. Drainage component; 321. Fixed plate; 322. Fixed pipe; 323. Connection pipe; 3231. Connection groove; 324. Sphere one; 325. Sealing plate; 326. Built-in plate; 327. Connection cylinder one; 328. Connection cylinder two; 33. Liquid inlet box; 34. Liquid inlet pipe; 35. Liquid outlet box; 36. Liquid outlet pipe; 37. Slurry discharge pipe; 38. Air pressure cylinder; 381. Movable block; 382. Air pressure ring; 39. Moving cylinder; 391. Top cone; 392. Rubber block. DETAILED DESCRIPTION

[0045] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm proposed below, but covers any modification, replacement and improvement of elements, parts and algorithms without departing from the spirit of the present invention. In the accompanying drawings and the following description, known structures and technologies are not shown to avoid unnecessary ambiguity to the present invention.

[0046] Example 1

[0047] Reference Figure 1-8 , which is the first embodiment of the present invention, provides a construction grouting equipment for underground excavation of a subway station, the construction grouting equipment for underground excavation of a subway station comprises a pump body 1, a frame 11 arranged on the pump body 1, a grouting pipe 12 arranged on the frame 11, a vertical plate is arranged at one end of the pump body 1, the frame 11 is connected to the vertical plate, the grouting pipe 12 is connected to the end of the frame 11 away from the vertical plate, grouting grooves are arranged in an array on the side wall of the grouting pipe 12, a driving pump body is arranged on the pump body 1, a liquid inlet end and a liquid outlet end are arranged on the driving pump body, a switching component 2 is arranged in the grouting pipe 12, and a slurry discharge component 3 is arranged in an array on the switching component 2,

[0048] The switching component 2 is used to drive the pulp discharge component 3 to shift.

[0049] The slurry discharge component 3 includes a circulation component 31 and a drainage component 32. The drainage component 32 includes a fixed plate 321, a fixed pipe 322 disposed on the fixed plate 321, a connecting pipe 323 disposed on the fixed pipe 322, a connecting groove 3231 disposed on the connecting pipe 323, a ball 1 324 disposed in the connecting pipe 323, a sealing plate 325 disposed on the ball 1 324, an inner plate 326 disposed in the connecting pipe 323, a connecting tube 1 327 disposed on the inner plate 326, and a connecting tube 2 328 disposed on the connecting tube 1 327. The fixing plate 321 is connected to the inner wall of the grouting pipe 12, the fixing pipe 322 is connected to a side of the fixing plate 321 close to the pump body 1, a fixing cavity is arranged inside the fixing pipe 322, a connecting pipe 323 is arranged at the end of the fixing pipe 322 away from the inner wall of the grouting pipe 12, a connecting cavity is arranged inside the connecting pipe 323, and the connecting cavity is communicated with the inside of the fixing cavity, a connecting groove 3231 is located at the end of the connecting pipe 323 away from the fixing pipe 322, a limiting block is arranged in the connecting groove 3231, and the limiting block is used to limit the circulation component 31, and the built-in plate 326 is fixedly arranged In the connection cavity, an array of built-in grooves is arranged at the edge of the built-in plate 326. One end of the connecting tube 1 327 is connected to the end of the built-in plate 326 away from the fixed tube. The connecting tube 2 328 is slidably arranged in the connecting tube 1 327. A spring 1 is arranged in the connecting tube 1 327. The end of the spring 1 away from the connecting tube 1 327 is connected to the connecting tube 2 328. The spring 1 is pickled. By immersing the spring in an acidic solution, oxides and impurities on the surface of the spring are removed, so that the spring is not easily corroded. The end of the connecting tube 2 328 away from the connecting tube 1 327 is connected to the sealing plate. 325 is connected, the ball 1 324 is arranged in the middle area of ​​the side of the sealing plate 325 away from the connection with the connecting tube 2 328, and a sealing ring is arranged at the edge of the sealing plate 325. A ball groove 1 is opened on the connecting tube 323, and the ball groove 1 is connected to the connecting groove 3231 and the connecting cavity respectively. The shape of the ball groove 1 is adapted to the outer contour of the ball 1 324. Initially, the spring 1 is in a compressed state, the ball 1 324 is in the ball groove 1 and close to the inner wall of the ball groove 1. At this time, the ball 1 324 blocks the ball groove 1, so that the connecting groove 3231 is not connected to the connecting cavity.

[0050] The liquid inlet boxes 33 are arranged in an array in the grouting pipe 12, the liquid inlet tubes 34 are arranged in an array on the liquid inlet boxes 33, the liquid outlet boxes 35 are arranged on the liquid inlet boxes 33, and the liquid outlet tubes 36 are arranged in an array on the liquid outlet boxes 35. The multiple liquid inlet boxes 33 are connected by a connecting tube 1, so that the interiors of the multiple liquid inlet boxes 33 are interconnected, the liquid outlet boxes 35 are connected to the liquid inlet boxes 33, and the multiple liquid outlet boxes 35 are connected by a connecting tube 2, so that the interiors of the multiple liquid outlet boxes 35 are interconnected. The liquid inlet box 33 near the side of the pump body 1 3 is connected to the liquid outlet end of the driving pump body through a tube, and the fluid discharged from the liquid outlet end of the driving pump body can enter the multiple liquid inlet boxes 33. A recovery tank is provided on the pump body 1, and the liquid outlet box 35 close to the pump body 1 is connected to the recovery tank through a tube. The liquid outlet pipe 36 is connected to the fixed pipe 322 and is internally communicated. The fluid in the fixed pipe 322 can enter the liquid outlet box 35 and enter the liquid outlet box 35 through the connecting pipe 2, so that the fluid in the multiple liquid outlet boxes 35 can enter the recovery tank.

[0051] The slurry discharge component 3 also includes a slurry discharge pipe 37, an air pressure cylinder 38 arranged on the slurry discharge pipe 37, a movable block 381 arranged in the air pressure cylinder 38, and an air pressure ring 382 arranged in the air pressure cylinder 38. The end of the liquid inlet pipe 34 away from the liquid inlet box 33 is connected to the slurry discharge pipe 37, and the fluid in the liquid inlet box 33 can enter the slurry discharge pipe 37 through the liquid inlet pipe 34. The air pressure cylinder 38 is sleeved on the outside of the slurry discharge pipe 37, and the air pressure ring 382 is fixedly connected to the inside of the air pressure cylinder 38, and an array of ventilation grooves is arranged at the connection between the air pressure ring 382 and the air pressure cylinder 38. The air pressure cylinder 38 and the air pressure ring 382 form an air pressure groove, and the movable block 381 is slidably arranged in the air pressure groove, and the movable block 381, the air pressure cylinder 38 and the air pressure ring 382 form an air pressure chamber.

[0052] A moving cylinder 39 is arranged in the air pressure ring 382, ​​a top cone 391 is arranged on the moving cylinder 39, and a rubber block 392 is arranged on the top cone 391. The moving cylinder 39 is sleeved on the outside of the slurry discharge pipe 37, and the moving cylinder 39 is slidably connected with the air pressure ring 382. A spring 2 is arranged in the air pressure ring 382, ​​and the spring 2 is respectively connected with the air pressure ring 382 and the moving cylinder 39. The air pressure ring 382, ​​the slurry discharge pipe 37, and the moving cylinder 39 form an elastic chamber. The elastic chamber and the air pressure chamber are communicated with each other through the ventilation groove. The top cone 391 is connected to the end of the moving cylinder 39 away from the air pressure cylinder 38. The rubber block 392 is arranged at the end of the top cone 391 close to the moving cylinder 39, and the outer The shaped contour is adapted to the inner diameter of the slurry discharge pipe 37, the rubber block 392 is located at the port area of ​​the slurry discharge pipe 37 on the side away from the connection with the liquid inlet pipe 34, the top cone 391 corresponds to the position of the grouting groove, and the top cone 391 can extend out of the grouting pipe 12 through the grouting groove. Initially, under the elastic force of spring 2, the movable cylinder 39 is close to the port of the slurry discharge pipe 37, and the rubber block 392 is inserted into the slurry discharge pipe 37 to prevent the fluid in the slurry discharge pipe 37 from leaking through the port of the slurry discharge pipe 37, and the gas in the elastic chamber enters the air pressure chamber through the ventilation groove, so that the movable block 381 is pushed to the end away from the air pressure cylinder 38 under the action of the gas pressure in the air pressure chamber.

[0053] The circulation assembly 31 includes a circulation tube 311, a circulation tube 312 disposed in the circulation tube 311, a connecting tube 313 disposed in the circulation tube 312, a connecting tube 4 314 disposed in the connecting tube 313, and a spherical body 215 disposed on the connecting tube 4 314. The circulation tube 311 and the connecting groove 3231 are located in correspondence with each other. The circulation tube 311 passes through the inside of the liquid discharge pipe. A spherical body 215 is disposed at the end of the circulation tube 311 away from the end thereof connected to the slurry discharge pipe 37. The circulation tube 312 is disposed in the inside of the end of the circulation tube 311 away from the end thereof connected to the slurry discharge pipe 37. The circulation tube 312 A through groove is arranged in an array on the side wall, connecting tube three 313 is arranged at the end of the circulation tube 312 away from the ball groove two, a spring three is arranged in the connecting tube three 313, the spring three is pickled, the connecting tube four 314 is slidably arranged in the connecting tube three 313, the end of the spring three away from the connecting tube three 313 is connected to the connecting tube four 314, the ball two 315 is arranged at the end of the connecting tube four 314 away from the connecting tube three 313, the outer contour of the ball two 315 is adapted to the outer contour of the ball groove two, and initially, the connecting tube four 314 pushes the ball two 315, causing the ball two 315 to block the ball groove two.

[0054] During use, first, a grouting hole is opened on the soil, and then the pump body 1 is pushed so that the grouting pipe 12 is gradually inserted into the grouting hole. When the grouting pipe 12 gradually penetrates into the bottom of the grouting hole, the switching component 2 will drive multiple grouting pipes 37 to gradually extend out of the grouting groove. At this time, the rubber block 392 still blocks the port of the grouting pipe 37. When the movable block 381 contacts the inner wall of the grouting pipe 12, as the grouting pipe 37 continues to shift, the movable block 381 will squeeze the gas in the air pressure chamber, causing the gas in the air pressure chamber to enter the elastic groove through the ventilation groove. At this time, the movable cylinder will be displaced by the gas pressure, the spring 2 will be deformed, and at the same time, the movable cylinder will drive the rubber block 392 to gradually move away from the port of the grouting pipe 37.

[0055] At the same time, the driving pump body is started. At this time, the fluid enters the multiple liquid inlet boxes 33 through the liquid outlet end of the driving pump body, then enters the slurry discharge pipe 37 through the liquid inlet pipe 34, and finally sprays out from the port of the slurry discharge pipe 37. The fluid sprayed from the slurry discharge pipe 37 first contacts the rubber block 392, and the rubber block 392 blocks the fluid sprayed from the slurry discharge pipe 37, so that the fluid is dispersed and sprayed out and mixed with the soil.

[0056] When grouting is completed, the pump body 1 is pulled to make the grouting pipe 12 withdraw from the grouting hole on the soil. At this time, the switching component 2 will drive the grouting pipe 37 to gradually shrink into the grouting pipe 12. During the movement and reset process of the grouting pipe 37, the movable block 381 will gradually move away from the inner wall of the grouting pipe 12, causing the movable cylinder to reset under the elastic force of the spring 2. The gas cylinder in the elastic chamber enters the air pressure chamber from the vent groove under the pressure of the movable cylinder 39. The movable block 381 is reset under the action of the air pressure, and the rubber block 392 will synchronously shift and block the port of the grouting pipe 37. The fluid in the grouting pipe 37 cannot be discharged through the port of the grouting pipe 37.

[0057] When the slurry discharge pipe 37 is about to return to the initial position, the circulation pipe 311 will shift into the connecting groove 3231, and the circulation pipe 311 will contact the ball 1 324 and force the ball 1 324 to shrink into the connecting pipe 323. At this time, the ball 1 324 gradually moves away from the ball groove 1, and the sealing plate 325 shifts synchronously with the ball 1 324, and the connecting tube 2 328 shifts toward the direction of the built-in plate 326, and the spring 1 is deformed;

[0058] At the same time, ball 2 315 contacts ball 1 324, causing ball 1 324 to force ball 2 315 to shrink into the circulation tube 311 and gradually move away from ball groove 2. At this time, the fluid in the slurry discharge tube 37 will enter the fixed tube 322 through the circulation tube 311, and then the fluid in the fixed tube 322 will enter the liquid outlet box 35 through the liquid outlet tube 36, and finally enter the recovery tank.

[0059] Example 2

[0060] Reference Figure 1-10, which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that:

[0061] The switching component 2 includes a contact cylinder 21, a contact block 22 arranged in the contact cylinder 21, a guide block 23 symmetrically arranged on the contact block 22, and a guide groove 211 symmetrically arranged in the contact cylinder 21. The contact cylinder 21 is arranged at the end of the grouting pipe 12 away from the pump body 1, the contact block 22 is slidably arranged in the contact cylinder 21, and the guide block 23 is slidably arranged in the guide groove 211. A spring four is arranged in the contact cylinder 21, one end of the spring four is connected to the end of the contact cylinder 21 close to the grouting pipe 12, and the other end of the spring four is connected to the contact block 22. A cover body is arranged at the end of the contact block 22 away from the grouting pipe 12, and the cover body is rotatably connected to the contact block 22.

[0062] A switching rod 24 is arranged on the contact block 22, a switching plate 25 is arranged in an array on the switching rod 24, a rotating plate 26 is arranged on the switching plate 25, a movable rod 251 is arranged in an array on the switching plate 25, and a mounting seat 252 is arranged on the movable rod 251. The switching rod 24 passes through the grouting pipe 12, the switching plate 25, and the rotating plate 26. The switching rod 24 is fixedly connected to the contact block 22, the switching rod 24 is rotatably connected to the switching plate 25, the switching rod 24 is fixedly connected to the rotating plate 26, and the rotating plate 26 is rotatably connected to the switching plate 25. A sliding groove is arranged in an array on the switching plate 25, and the movable rod 251 is slidably arranged in the sliding groove. A sliding shaft is arranged at one end of the movable rod 251 close to the switching rod 24, an inferior arc groove is arranged in an array on the rotating plate 26, and the sliding shaft is slidably arranged in the inferior arc groove. The mounting seat 252 is arranged at one end of the movable rod 251 away from the sliding shaft, and the slurry discharge pipe 37 is arranged on the mounting seat 252.

[0063] During use, when the grouting pipe 12 is inserted into the grouting hole on the soil, when the cover body contacts the soil at the bottom of the grouting hole, the cover body is blocked by the soil, and the friction resistance between the cover body and the soil is relatively large, so that the cover body is limited, the contact block 22 rotates and moves toward the direction of the grouting pipe 12, the guide block 23 slides in the guide groove 211, the spring 4 is deformed, and the switch rod 24 rotates at this time;

[0064] At the same time, the rotating plate 26 rotates synchronously with the switching rod 24, and the sliding shaft slides along the inferior arc groove, so that the movable rod 251 slides along the sliding groove. At this time, the multiple movable rods 251 move away from each other, and the mounting seat 252 drives the grouting pipe 37 thereon to extend out of the grouting groove and out of the grouting pipe 12;

[0065] When the grouting pipe 12 is withdrawn from the grouting hole on the soil, the spring 24 is reset, the switching rod 24 rotates, the rotating plate 26 rotates, the multiple movable rods 251 approach each other, and the grouting pipe 37 gradually shrinks into the grouting pipe 12.

[0066] The remaining structures are the same as those of Example 1.

[0067] Example 3

[0068] Reference Figure 1-11 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that:

[0069] A switching tube 27 is arranged on the switching rod 24, a switching groove 271 is arranged on the switching tube 27, and a liquid storage tank 28 is arranged on the pump body 1. The switching tube 27 is arranged at the end of the switching rod 24 away from the contact block 22, and the end of the switching tube 27 away from the switching rod 24 is connected to the liquid inlet end of the driving pump body. The switching tube 27 passes through the liquid storage tank 28, and the switching groove 271 is located in the liquid storage tank 28.

[0070] A partition 281 is arranged in the liquid storage tank 28, a partition tube 29 is arranged on the partition 281, and a partition groove 291 is symmetrically arranged on the partition tube 29. The partition 281 and the partition tube 29 divide the liquid storage tank 28 into a material chamber and a cleaning chamber. The material chamber is filled with slurry, and the cleaning chamber is filled with clean water. The partition tube 29 is connected to the inside of the material chamber and the cleaning chamber respectively. The switching tube 27 is rotatably arranged in the partition tube 29. Initially, the switching groove 271 coincides with the partition groove 291 close to the cleaning chamber, and the clean water in the cleaning chamber is filled with slurry. Water can enter the switching tube 27 through the partition groove 291 and the switching groove 271. At this time, the clean water in the switching tube 27 enters the driving pump body through the liquid inlet end of the driving pump body and is discharged from the liquid outlet end. When the switching rod 24 rotates, the switching groove 271 will overlap with the partition groove 291 close to the side of the material chamber, causing the slurry in the material chamber to enter the switching tube 27 through the partition groove 291 and the switching groove 271. At this time, the slurry in the switching tube 27 enters the driving pump body through the liquid inlet end of the driving pump body and is discharged from the liquid outlet end.

[0071] During use, when the cover body contacts the soil and causes the switching rod 24 to rotate, the switching rod 24 will drive the switching tube 27 to rotate, so that the switching groove 271 on the switching tube 27 rotates to coincide with the separation groove 291 close to the side of the material chamber. At this time, the slurry in the material chamber will pass through the separation groove 291 and the switching groove 271 into the switching tube 27, and then enter the driving pump body through the switching tube 27. At this time, the slurry will be discharged into the liquid inlet box 33 through the liquid outlet end of the driving pump body, and discharged into the soil through the slurry discharge pipe 37;

[0072] When grouting is completed, the grouting pipe 12 withdraws from the grouting hole. At this time, the spring four is reset, and the switching rod 24 drives the switching pipe 27 to rotate. At this time, the switching groove 271 rotates and coincides with the dividing groove 291 close to the clean water chamber. Then, the clean water in the cleaning chamber enters the switching pipe 27 through the dividing groove 291 and the switching groove 271, and enters the liquid inlet box 33 through the driving pump body, and then enters the slurry discharge pipe 37, and then enters the fixed pipe 322 from the slurry discharge pipe 37, and the clean water fixed pipe 322 enters the liquid outlet box 35, and finally enters the recovery tank through the liquid outlet box 35.

[0073] The remaining structure is the same as that of Example 2.

[0074] Example 4

[0075] Reference Figure 1-11 , which is a fourth embodiment of the present invention, provides: a grouting method for construction grouting equipment for underground excavation of a subway station, comprising the following grouting method,

[0076] S1, firstly, a grouting hole is opened on the soil, and then the pump body 1 is pushed so that the grouting pipe 12 is gradually inserted into the grouting hole. When the cover body contacts the soil at the bottom of the grouting hole, the cover body is blocked by the soil, and then the contact block 22 rotates and shifts toward the grouting pipe 12, the guide block 23 slides in the guide groove 211, the spring 4 is deformed, and at this time the switching rod 24 rotates;

[0077] S2, the rotating plate 26 rotates synchronously with the switching rod 24, and the sliding shaft slides along the inferior arc groove, so that the movable rod 251 slides along the sliding groove. At this time, the multiple movable rods 251 move away from each other, and the mounting seat 252 drives the grouting pipe 37 thereon to extend out of the grouting groove and out of the grouting pipe 12;

[0078] S3, when the movable block 381 contacts the inner wall of the grouting pipe 12, as the grout discharge pipe 37 continues to shift, the movable block 381 will squeeze the gas in the air pressure chamber, at this time the movable cylinder will shift under the action of the gas pressure, the spring 2 will deform, and at the same time the movable cylinder will drive the rubber block 392 to gradually move away from the port of the grout discharge pipe 37;

[0079] S4, at the same time, the switching rod 24 drives the switching tube 27 to rotate, so that the switching groove 271 on the switching tube 27 rotates to overlap with the separation groove 291 close to the side of the material chamber. At this time, the slurry in the material chamber will pass through the separation groove 291 and the switching groove 271 into the switching tube 27;

[0080] S5, start the driving pump body, the slurry entering the switching pipe 27 enters the driving pump body and is discharged into the liquid inlet box 33 through the liquid outlet end of the driving pump body, and finally discharged into the soil through the slurry discharge pipe 37;

[0081] S6, when grouting is completed, the grouting pipe 12 is withdrawn from the grouting hole, and the spring 4 is reset, the switching rod 24 drives the switching pipe 27 to rotate, the rotating plate 26 rotates, and the multiple movable rods 251 approach each other, and the grouting pipe 37 gradually shrinks into the grouting pipe 12, and the movable block 381 is reset by the action of air pressure, and the rubber block 392 will synchronously shift and block the port of the grouting pipe 37;

[0082] S7, at the same time, the flow tube 311 will shift into the connecting groove 3231, the ball 1 324 will gradually move away from the ball groove 1, and the ball 2 315 will gradually move away from the ball groove 2;

[0083] S8, at the same time, the switching rod 24 drives the switching tube 27 to rotate, and the switching groove 271 rotates to overlap with the dividing groove 291 close to the clean water chamber side, and then the clean water in the cleaning chamber enters the switching tube 27 from the dividing groove 291 and the switching groove 271, and enters the liquid inlet box 33 through the driving pump body, and then enters the slurry discharge pipe 37, and then enters the fixed pipe 322 from the slurry discharge pipe 37, and then enters the liquid outlet box 35 from the fixed pipe 322, and finally enters the recovery tank through the liquid outlet box 35.

[0084] Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on the study of the drawings, the specification and the claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to indicate names rather than to indicate any specific order. Any figure marks in the claims should not be construed as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a single hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A construction grouting device for underground excavation of a subway station, comprising a pump body (1), a frame (11) arranged on the pump body (1), and a grouting pipe (12) arranged on the frame (11), characterized in that: a switching component (2) disposed in the grouting pipe (12), and grout discharge components (3) arranged in an array on the switching component (2), The switching component (2) is used to drive the pulp discharge component (3) to shift. The slurry discharge component (3) comprises a circulation component (31) and a drainage component (32), wherein the drainage component (32) comprises a fixed plate (321), a fixed pipe (322) arranged on the fixed plate (321), a connecting pipe (323) arranged on the fixed pipe (322), a connecting groove (3231) arranged on the connecting pipe (323), a sphere (324) arranged in the connecting pipe (323), a sealing plate (325) arranged on the sphere (324), an inner plate (326) arranged in the connecting pipe (323), a connecting tube (327) arranged on the inner plate (326), and a connecting tube (328) arranged on the connecting tube (327).

2. The grouting equipment for underground excavation of a subway station according to claim 1 is characterized in that: The grouting pipe (12) is provided with a liquid inlet box (33) in an array, liquid inlet pipes (34) arranged in an array on the liquid inlet box (33), a liquid outlet box (35) arranged on the liquid inlet box (33), and liquid outlet pipes (36) arranged in an array on the liquid outlet box (35).

3. The grouting equipment for underground excavation of a subway station according to claim 1 is characterized in that: The pulp discharge component (3) further comprises a pulp discharge pipe (37), a pneumatic cylinder (38) arranged on the pulp discharge pipe (37), a movable block (381) arranged in the pneumatic cylinder (38), and a pneumatic ring (382) arranged in the pneumatic cylinder (38).

4. The grouting equipment for underground excavation of a subway station according to claim 3 is characterized in that: The air pressure ring (382) is provided with a moving cylinder (39), a top cone (391) provided on the moving cylinder (39), and a rubber block (392) provided on the top cone (391).

5. The grouting equipment for underground excavation of a subway station according to claim 1 is characterized by: The circulation component (31) includes a circulation tube (311), a circulation cylinder (312) arranged in the circulation tube (311), a connecting cylinder three (313) arranged in the circulation cylinder (312), a connecting cylinder four (314) arranged in the connecting cylinder three (313), and a spherical body two (315) arranged on the connecting cylinder four (314).

6. The grouting equipment for underground excavation of a subway station according to claim 1, characterized in that: The switching component (2) comprises a contact cylinder (21), a contact block (22) arranged in the contact cylinder (21), a guide block (23) symmetrically arranged on the contact block (22), and a guide groove (211) symmetrically arranged in the contact cylinder (21).

7. The grouting equipment for underground excavation of a subway station according to claim 6, characterized in that: The contact block (22) is provided with a switching rod (24), a switching plate (25) arranged in an array on the switching rod (24), a rotating plate (26) arranged on the switching plate (25), a movable rod (251) arranged in an array on the switching plate (25), and a mounting seat (252) arranged on the movable rod (251).

8. The grouting equipment for underground excavation of a subway station according to claim 7, characterized in that: The switching rod (24) is provided with a switching tube (27), a switching groove (271) provided on the switching tube (27), and a liquid storage tank (28) provided on the pump body (1).

9. The grouting equipment for underground excavation of a subway station according to claim 8, characterized in that: The liquid storage box (28) is provided with a partition (281), a partition tube (29) arranged on the partition (281), and a partition groove (291) symmetrically arranged on the partition tube (29).

10. A grouting method for the construction grouting equipment for underground excavation of a subway station as claimed in any one of claims 1 to 9, comprising the following grouting method: First, a grouting hole is opened on the soil, and then the pump body (1) is pushed so that the grouting pipe (12) is gradually inserted into the grouting hole. When the cover body contacts the soil at the bottom of the grouting hole, the cover body is blocked by the soil, and then the contact block (22) rotates and moves toward the grouting pipe (12), the guide block (23) slides in the guide groove (211), the spring 4 is deformed, and at this time the switching rod (24) rotates; The rotating plate (26) rotates synchronously with the switching rod (24), and the sliding shaft slides along the inferior arc groove, so that the movable rod (251) slides along the sliding groove. At this time, the multiple movable rods (251) move away from each other, and the mounting seat (252) drives the grout discharge pipe (37) thereon to extend out of the grouting pipe (12) from the grout discharge groove; When the movable block (381) contacts the inner wall of the grouting pipe (12), as the grouting pipe (37) continues to shift, the movable block (381) will squeeze the gas in the air pressure chamber, and the movable cylinder will shift under the action of the gas pressure, the spring 2 will deform, and at the same time the movable cylinder will drive the rubber block (392) to gradually move away from the end of the grouting pipe (37); At the same time, the switching rod (24) drives the switching tube (27) to rotate, so that the switching groove (271) on the switching tube (27) rotates to overlap with the separation groove (291) close to the material chamber. At this time, the slurry in the material chamber will pass through the separation groove (291) and the switching groove (271) into the switching tube (27); The driving pump body is started, and the slurry entering the switching pipe (27) enters the driving pump body and is discharged into the liquid inlet box (33) through the liquid outlet end of the driving pump body, and finally discharged into the soil through the slurry discharge pipe (37); When grouting is completed, the grouting pipe (12) is withdrawn from the grouting hole, and the spring (4) is reset. The switching rod (24) drives the switching pipe (27) to rotate, the rotating plate (26) rotates, and the plurality of movable rods (251) approach each other. The grouting pipe (37) gradually shrinks into the grouting pipe (12), and the movable block (381) is reset by the action of air pressure. The rubber block (392) will synchronously shift and block the port of the grouting pipe (37). The circulation tube (311) will be displaced into the connecting groove (3231), the ball 1 (324) will gradually move away from the ball groove 1, and the ball 2 (315) will gradually move away from the ball groove 2; Then, the switching rod (24) drives the switching tube (27) to rotate, and the switching groove (271) rotates to overlap with the separation groove (291) close to the clean water chamber. Then, the clean water in the cleaning chamber enters the switching tube (27) through the separation groove (291) and the switching groove (271), and enters the liquid inlet box (33) through the driving pump body. Then, the clean water enters the slurry discharge pipe (37), and then enters the fixed pipe (322) and the liquid outlet box (35) in sequence from the slurry discharge pipe (37), and finally enters the recovery tank through the liquid outlet box (35).

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