Tunnel grouting device and using method thereof

Abstract

The invention provides a tunnel grouting device and a using method thereof, and belongs to the technical field of tunnel grouting, the tunnel grouting device comprises a movable shell, a mounting plate, a lead screw nut and a pushing plate, and a moving groove is formed in the upper end of the movable shell; the two mounting plates are fixedly connected to the two ends of the movable shell respectively, one end of one mounting plate is fixedly connected with a motor, the output end of the motor is fixedly connected with one end of a lead screw, and the lead screw is rotationally connected between the two mounting plates; the lead screw nut is in threaded connection with the circumferential surface of the lead screw; the pushing plate is fixedly connected to the lower end of the lead screw nut. When a tunnel needs to be subjected to grouting treatment, the spiral precession mechanism is aligned with a to-be-drilled part, the motor is started to drive the lead screw to rotate, then the lead screw nut drives the pushing plate to move, grouting liquid in the movable shell is pushed leftwards, meanwhile, the spiral precession mechanism is driven to operate, and the drilling part is drilled through the mechanism; and after drilling is completed, grouting treatment is conducted on the interior of the hole, and drilling and grouting integration is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel grouting, and in particular relates to a tunnel grouting device and a use method thereof. Background Art

[0002] With the rapid development of underground engineering construction, tunnel engineering plays an increasingly important role in urban transportation, water conservancy engineering and other fields. In the process of tunnel construction, grouting technology is widely used in tunnel construction as an effective ground reinforcement and waterproofing measure. Grouting technology can enhance the stability of the ground and prevent groundwater infiltration by injecting slurry around the tunnel, thereby improving the safety and service life of the tunnel.

[0003] However, the existing tunnel grouting devices and methods have the following technical problems: Low grouting efficiency: Traditional grouting equipment is complex to operate and has low grouting efficiency, making it difficult to meet the needs of large-scale tunnel construction.

[0004] Unstable grouting quality: Due to the lack of precise control mechanism, the grouting liquid is unevenly distributed, resulting in unstable grouting quality, affecting the stability and waterproofing effect of the tunnel.

[0005] Low equipment integration: Existing grouting devices usually require multiple independent devices to work together, and the equipment integration is low, which is not conducive to the rapid deployment and operation of on-site construction.

[0006] Therefore, developing a new type of tunnel grouting device and a method of using the same to improve grouting efficiency, ensure grouting quality, and enhance equipment integration has become a technical problem that needs to be urgently solved in this field. Summary of the invention

[0007] The object of the present invention is to provide a tunnel grouting device and a method of using the same, aiming to solve the problems mentioned in the background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: A tunnel grouting device, comprising: A movable shell, wherein the upper end of the movable shell is provided with a movable groove; Two mounting plates, the two mounting plates are respectively fixedly connected to the two ends of the movable shell, one end of one of the mounting plates is fixedly connected to a motor, the output end of the motor is fixedly connected to one end of a screw rod, and the screw rod is rotatably connected between the two mounting plates; A screw nut, wherein the screw nut is threadedly connected to the circumferential surface of the screw; A push plate, the push plate is fixedly connected to the lower end of the screw nut; A transmission hole, which is opened at one end of the movable shell and communicates with the delivery pipe. When the push plate moves toward the transmission hole, the grouting liquid in the movable shell is transported from the transmission hole to the delivery pipe; The spiral screwing mechanism is arranged on one side of the movable shell and is used for drilling the tunnel.

[0009] As a preferred solution of the present invention, the spiral screwing mechanism consists of a telescopic rod, a middle partition, a hollow drill bit, two fixed rods and a driving assembly. The telescopic rod is rotatably connected to the lower end of the conveying pipe, the two fixed rods are fixedly connected to the lower end of the movable shell, the middle partition is fixedly connected to one end of the two fixed rods, the circumferential surface of the telescopic end of the telescopic rod is provided with a thread, and the telescopic end of the telescopic rod is threadedly connected to the thread groove of the middle partition, the hollow drill bit is fixedly connected to the telescopic end of the telescopic rod, and a conveying hole connected to the conveying pipe is provided inside the telescopic rod.

[0010] As a preferred solution of the present invention, the driving assembly consists of a driving groove, a driving block, a driving rod, a rack and a gear. The driving groove is opened at the lower end of the movable shell. Folding plates are provided in the driving groove and the movable groove. The driving block seals and penetrates the folding plate, and the two ends are respectively fixedly connected to the lower end of the pushing plate and one end of the driving rod. The other end of the driving rod is fixed to the rack. The gear is fixedly connected to the circumferential surface of the telescopic rod and meshes with the rack.

[0011] As a preferred solution of the present invention, two stabilizing plates are fixedly connected at both ends of the movable shell, two limiting rods are fixedly connected between the multiple stabilizing plates, and limiting rings are fixedly connected at both ends of the screw nut, and the two limiting rings are respectively slidably connected to the circumferential surfaces of the two limiting rods.

[0012] As a preferred solution of the present invention, a liquid storage tank is provided on one side of the movable shell, and a replenishing pipe is fixedly connected between the liquid storage tank and the movable shell. The slurry in the liquid storage tank 1 is pressurized by an external pump body and transported to the movable shell 6 through the replenishing pipe 5.

[0013] As a preferred solution of the present invention, a connecting column is fixedly connected between the circumferential surface of the liquid storage tank and one end of the movable shell, and a control valve is provided on the circumferential surface of the telescopic rod.

[0014] As a preferred solution of the present invention, the side of the movable shell is fixedly connected with an L rod, the lower end of the L rod is fixedly connected with a fixed block, one end of the fixed block is fixedly connected with a horizontal rod, the horizontal rod is slidably connected with a horizontal block, and the horizontal block is fixed to the toothless surface of the rack.

[0015] As a preferred solution of the present invention, two transmission pipes are fixedly connected to the upper end of the liquid storage tank, and the upper ends of the two transmission pipes are fixedly connected to connecting flanges.

[0016] As a preferred solution of the present invention, a plurality of stirring rods are driven to rotate in the liquid storage tank by an electric roller, and the electric roller is fixed to the output end of the stirring motor.

[0017] A method for using a tunnel grouting device comprises the following steps: S1: When grouting is required in the tunnel, the tunnel grouting device is set up to the position where grouting is required, the hollow drill bit is first aligned with the grouting position, and then the motor is started so that its output end drives the screw to rotate, and then the screw nut moves in the moving groove and drives the driving block at the lower end of the push plate to move left, and the driving block drives the rack to move left through the driving rod, and the rack will mesh with the rotating gear, so that the telescopic rod starts to rotate, and because the telescopic end of the telescopic rod cooperates with the threaded groove of the middle partition plate, the telescopic end of the telescopic rod rotates downward, so that the hollow drill bit drills downward; S2: When the push plate moves to the left, the grouting liquid in the movable shell is first pushed into the delivery pipe through the transmission hole. When the drilling is completed, the cavity between the push plate and the delivery pipe will be filled with grouting liquid. At this time, there is a gap between the push plate and the entrance of the transmission hole. S3: Finally, the control valve is started to allow the grouting liquid in the delivery pipe to flow along the delivery hole into the hollow drill bit and finally into the borehole. The motor continues to drive the screw nut and the push plate to move. At this time, the space between the left side of the push plate and the movable shell gradually decreases, causing the pressure of the grouting liquid to gradually accumulate and form a back pressure, thereby ensuring that the grouting liquid is injected into the borehole with an appropriate pressure to complete the grouting treatment of the borehole. The grouting liquid can be stirred by the liquid storage tank and the stirring rod arranged inside it to prevent solidification, and the grouting liquid in the liquid storage tank is transmitted to the movable shell through the supplementary pipe.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. When the tunnel needs to be grouted, align the spiral screwing mechanism with the part to be drilled, and then start the motor so that its output end drives the screw to rotate, and then the screw nut drives the push plate to move, pushing the grouting liquid in the movable shell to the left, and at the same time drives the spiral screwing mechanism to operate, and the drilling part is drilled through this mechanism. After the drilling is completed, the hole is grouted to realize the integration of drilling and grouting, improve efficiency and reduce costs.

[0019] 2. The motor drives the screw to rotate, driving the screw nut and the push plate to move. While pushing the grouting liquid, the push plate continues to move to accumulate back pressure, forming high-pressure grouting, ensuring that the grouting liquid is injected into the borehole at an appropriate pressure, enhancing the diffusion and filling effect of the grouting liquid in the formation, and improving the grouting effect.

[0020] 3. The transmission pipe and the external slurry can be connected through the connecting flange, which is convenient for the external slurry to be transmitted to the liquid storage tank. The slurry in the liquid storage tank can be transmitted to the movable shell through the supplementary pipe. The slurry in the liquid storage tank can be prevented from solidifying by the rotation of the stirring rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is the main stereoscopic view in the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A; Figure 3 It is a bottom-up stereogram in the present invention; Figure 4 It is a rear perspective view in the present invention; Figure 5 It is the first main sectional stereogram in the present invention; Figure 6 It is a top perspective view of the present invention; Figure 7 It is a first side perspective view in the present invention; Figure 8 It is a second side perspective view of the present invention; Fig. 9 It is the second main sectional stereoscopic view in the present invention.

[0022] In the figure: 1, liquid storage tank; 2, transmission pipe; 3, connecting flange; 4, connecting column; 5, supplementary pipe; 6, movable shell; 7, driving rod; 8, rack; 9, delivery pipe; 10, telescopic rod; 11, gear; 12, control valve; 13, middle partition; 14, hollow drill bit; 15, fixing rod; 16, mounting plate; 17, stabilizing plate; 18, screw rod; 19, limit rod; 20, limit ring; 21, screw rod screw 1. Mother; 22. Motor; 23. Folding plate; 24. Driving block; 25. Horizontal rod; 26. Horizontal block; 27. Stirring rod; 28. Pushing plate; 29. ​​Transmission hole; 30. Fixed block; 31. Delivery hole; 32. L rod; 33. Fixed plate; 34. Sprinkler; 35. Water transmission pipe; 36. Water storage tank; 37. Water supply pipe; 38. Leakage-proof plate; 39. Water pushing plate; 40. Linkage rod; 41. Water pushing block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example: See Figure 1-7 , the present invention provides the following technical solutions: A tunnel grouting device, comprising: A movable shell 6, wherein a movable slot is formed at the upper end of the movable shell 6 so that the screw nut 21 can move freely in the slot; Two mounting plates 16, the two mounting plates 16 are respectively fixedly connected to the two ends of the movable shell 6, one end of one of the mounting plates 16 is fixedly connected to a motor 22, the output end of the motor 22 is fixedly connected to one end of a screw rod 18, the screw rod 18 is rotatably connected between the two mounting plates 16, the rotation of the motor 22 drives the screw rod 18 to rotate, and then drives the screw nut 21 and the pushing plate 28 to move, so as to realize the pushing of the grouting liquid and the work of the spiral screwing mechanism; A screw nut 21, wherein the screw nut 21 is threadedly connected to the circumferential surface of the screw 18; A push plate 28, wherein the push plate 28 is fixedly connected to the lower end of the screw nut 21 and moves along with the movement of the screw nut 21; The transmission hole 29 is opened at one end of the movable shell 6 and communicates with the delivery pipe 9. It is a passage for the grouting liquid to enter the delivery pipe 9 from the movable shell 6. When the push plate 28 moves toward the transmission hole 29, the grouting liquid in the movable shell 6 is transported from the transmission hole 29 to the delivery pipe 9. The spiral screwing mechanism is arranged on one side of the movable shell 6 and is used for drilling the tunnel.

[0025] For details, please refer to Figure 1 and Figure 5The spiral screwing mechanism is composed of a telescopic rod 10, a middle partition 13, a hollow drill bit 14, two fixed rods 15 and a driving assembly. The telescopic rod 10 is rotatably connected to the lower end of the conveying pipe 9, and the two fixed rods 15 are fixedly connected to the lower end of the movable shell 6. The middle partition 13 is fixedly connected to one end of the two fixed rods 15, providing a support and threaded connection basis for the telescopic rod 10, ensuring the stability and accuracy of the telescopic rod 10 during rotation and extension. The circumferential surface of the telescopic end of the telescopic rod 10 is provided with a thread, and the telescopic end of the telescopic rod 10 is threadedly connected to the thread groove of the middle partition 13. The hollow drill bit 14 is fixedly connected to the telescopic end of the telescopic rod 10, and rotates and drills downward under the drive of the telescopic rod 10 to create a channel for grouting. A conveying hole 31 connected to the conveying pipe 9 is provided inside the telescopic rod 10. The telescopic rod 10 can rotate and extend at the same time, driving the hollow drill bit 14 to drill downward; For details, please refer to Figure 1 and Figure 5 The driving assembly consists of a driving groove, a driving block 24, a driving rod 7, a rack 8 and a gear 11. The driving groove is opened at the lower end of the movable shell 6. A folding plate 23 is provided in the driving groove and the movable groove. The driving block 24 seals and penetrates the folding plate 23, and both ends are fixedly connected to the lower end of the pushing plate 28 and one end of the driving rod 7 respectively. When the pushing plate 28 moves, the driving block 24 moves in the driving groove to transmit the linear motion of the pushing plate 28 to the driving rod 7. The other end of the driving rod 7 is fixed to the rack 8. The gear 11 is fixedly connected to the circumferential surface of the telescopic rod 10 and meshes with the rack 8. When the rack 8 moves, the gear 11 will rotate accordingly, thereby driving the telescopic rod 10 to rotate.

[0026] Among them, in the initial stage, the pushing plate 28 should be moved to the rightmost inner wall of the movable shell 6, and then the liquid storage tank 1 is connected to the external pump body through the connecting flange 3, and the grouting liquid in the liquid storage tank 1 is transferred to the movable shell 6 through the replenishing pipe 5, so that the grouting liquid is located on the left side of the pushing plate 28 for filling of the grouting liquid.

[0027] For details, please refer to Figure 1 and Figure 2 Two stabilizing plates 17 are fixedly connected to both ends of the movable shell 6, and two limit rods 19 are fixedly connected between the multiple stabilizing plates 17. Both ends of the screw nut 21 are fixedly connected to limit rings 20. The two limit rings 20 are respectively slidably connected to the circumferential surfaces of the two limit rods 19. When the screw nut 21 moves, the limit rings 20 can be driven to slide in the limit rods 19, thereby improving the horizontal movement stability of the screw nut 21.

[0028] For details, please refer to Figure 1A liquid storage tank 1 is provided on one side of the movable shell 6, and a replenishing pipe 5 is fixedly connected between the liquid storage tank 1 and the movable shell 6. The slurry in the liquid storage tank 1 is pressurized by an external pump body and transported to the movable shell 6 through the replenishing pipe 5, providing a continuous slurry supply for grouting.

[0029] For details, please refer to Figure 1 A connecting column 4 is fixedly connected between the circumferential surface of the liquid storage tank 1 and one end of the movable shell 6, and a control valve 12 is provided on the circumferential surface of the telescopic rod 10. The liquid storage tank 1 and the movable shell 6 can be fixed and connected through the connecting column 4, and the slurry flowing in the telescopic rod 10 can be controlled through the control valve 12.

[0030] For details, please refer to Figure 1 , Figure 4 and Figure 5 The side of the movable shell 6 is fixedly connected with an L-rod 32, and the lower end of the L-rod 32 is fixedly connected with a fixed block 30. One end of the fixed block 30 is fixedly connected with a horizontal rod 25, and the other end of the horizontal rod 25 is used to connect the grouting fixing frame for setting up the tunnel grouting device. The horizontal rod 25 is slidably connected with a horizontal block 26, and the horizontal block 26 is fixed to the toothless surface of the rack 8. Two transmission pipes 2 are fixedly connected to the upper end of the liquid storage tank 1, and the upper ends of the two transmission pipes 2 are fixedly connected with a connecting flange 3. The transmission pipes 2 and the external slurry can be connected through the two connecting flanges 3, so that the slurry in the liquid storage tank 1 can be quickly replenished. The liquid storage tank 1 is driven to rotate multiple stirring rods 27 by an electric roller. The electric roller is fixed to the output end of the stirring motor. The multiple stirring rods 27 are driven to move by the electric roller to prevent the slurry in the liquid storage tank 1 from solidifying.

[0031] For details, please refer to Figure 1 - Figure 7 , a grouting method using a tunnel grouting device, comprising the following steps: S1: When grouting is required in the tunnel, the tunnel grouting device is set up to the position where grouting is required, the hollow drill bit 14 is first aligned with the grouting position, and then the motor 22 is started so that its output end drives the screw 18 to rotate, and then the screw nut 21 moves in the moving groove and drives the driving block 24 at the lower end of the push plate 28 to move left, and the driving block 24 drives the rack 8 to move left through the driving rod 7, and the rack 8 will mesh with the rotating gear 11, so that the telescopic rod 10 starts to rotate, and because the telescopic end of the telescopic rod 10 cooperates with the threaded groove of the middle partition plate 13, the holy end of the telescopic rod 10 rotates downward, so that the hollow drill bit 14 drills downward; S2: When the push plate 28 moves to the left, the grouting liquid in the movable shell 6 is first pushed into the delivery pipe 9 through the transmission hole 29. When the drilling is completed, the cavity between the push plate 28 and the delivery pipe 9 will be filled with the grouting liquid. At this time, there is a gap between the push plate 28 and the entrance of the transmission hole 29. S3: Finally, start the control valve 12 to allow the grouting liquid in the delivery pipe 9 to flow along the delivery hole 31 into the hollow drill bit 14 and finally into the borehole. Continue to drive the screw nut 21 and the push plate 28 to move through the motor 22. At this time, the space between the left side of the push plate 28 and the movable shell 6 gradually decreases, causing the pressure of the grouting liquid to gradually accumulate and form a back pressure, thereby ensuring that the grouting liquid is injected into the borehole with an appropriate pressure to complete the grouting treatment of the borehole. The grouting liquid can be stirred by the liquid storage tank 1 and the stirring rod 27 arranged therein to prevent solidification, and the grouting liquid in the liquid storage tank 1 is transmitted to the movable shell 6 through the replenishing pipe 5.

[0032] Example: For details, please refer to Figure 8 and Fig. 9 On the basis of Example 1, one end of the middle partition 13 is fixedly connected to a fixed plate 33, one end of the movable shell 6 is fixedly connected to a water tank 36, one end of the water tank 36 is fixedly connected to a water transfer pipe 35, the water transfer pipe 35 is fixedly connected to the fixed plate 33, and the lower end of the water transfer pipe 35 is fixedly connected to a nozzle 34, a water valve (not shown in the figure) of a switch is provided on the water transfer pipe 35, the upper end of the water tank 36 is fixedly connected to a water supply pipe 37, a water pusher plate 39 is slidably connected in the water tank 36, and a linkage groove is provided at the lower end of the water tank 36, the lower end of the water pusher plate 39 is fixedly connected to a water pusher block 41, and the water pusher block 41 and the driving rod 7 are fixedly connected by a linkage rod 40.

[0033] In this embodiment: when the driving rod 7 moves, it can drive the linkage rod 40 and the water pushing block 41 to move, so that the water pushing block 41 moves in the linkage groove, and then drives the water pushing plate 39 to move left in the water tank 36, pushing the liquid in the water tank 36 to the left, and allowing the liquid to enter the nozzle 34 through the water transfer pipe 35, and spraying the liquid to the hollow drill bit 14 through the nozzle 34, which can effectively reduce the temperature of the hollow drill bit 14 and extend its service life. At the same time, it can also remove debris and dust generated during the drilling process, keep the drilled hole clean, and improve the drilling efficiency.

[0034] Preferably, a leak-proof plate 38 (the material of the leak-proof plate 38 is the same as that of the folding plate 23) is fixedly connected between the two ends of the water pushing block 41 and the linkage groove. The leak-proof plate 38 can prevent the liquid in the water tank 36 from leaking from the linkage groove when the water pushing block 41 moves.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tunnel grouting device, characterized in that: include: A movable shell (6), wherein a movable groove is formed at an upper end of the movable shell (6); Two mounting plates (16), the two mounting plates (16) being fixedly connected to two ends of the movable shell (6), one end of one of the mounting plates (16) being fixedly connected to a motor (22), the output end of the motor (22) being fixedly connected to one end of a screw rod (18), and the screw rod (18) being rotatably connected between the two mounting plates (16); A screw nut (21), wherein the screw nut (21) is threadedly connected to the circumferential surface of the screw (18); A push plate (28), the push plate (28) being fixedly connected to the lower end of the screw nut (21); A transmission hole (29), wherein the transmission hole (29) is formed at one end of the movable shell (6) and is connected to the delivery pipe (9); when the push plate (28) moves toward the transmission hole (29), the grouting liquid in the movable shell (6) is transported from the transmission hole (29) to the delivery pipe (9); A spiral screwing mechanism is arranged on one side of the movable shell (6) and is used for drilling a tunnel.

2. A tunnel grouting device according to claim 1, characterized in that: The spiral screwing mechanism comprises a telescopic rod (10), a middle partition (13), a hollow drill bit (14), two fixed rods (15) and a driving assembly. The telescopic rod (10) is rotatably connected to the lower end of the conveying pipe (9). The two fixed rods (15) are fixedly connected to the lower end of the movable shell (6). The middle partition (13) is fixedly connected to one end of the two fixed rods (15). The circumferential surface of the telescopic end of the telescopic rod (10) is provided with a thread, and the telescopic end of the telescopic rod (10) is threadedly connected to the thread groove of the middle partition (13). The hollow drill bit (14) is fixedly connected to the telescopic end of the telescopic rod (10). A conveying hole (31) communicating with the conveying pipe (9) is provided inside the telescopic rod (10).

3. A tunnel grouting device according to claim 2, characterized in that: The driving assembly is composed of a driving groove, a driving block (24), a driving rod (7), a rack (8) and a gear (11); the driving groove is opened at the lower end of the movable shell (6); a folding plate (23) is arranged in the driving groove and the movable groove; the driving block (24) seals and penetrates the folding plate (23) and has two ends fixedly connected to the lower end of the pushing plate (28) and one end of the driving rod (7), respectively; the other end of the driving rod (7) is fixed to the rack (8); the gear (11) is fixedly connected to the circumferential surface of the telescopic rod (10) and meshes with the rack (8).

4. A tunnel grouting device according to claim 3, characterized in that: Two stabilizing plates (17) are fixedly connected to both ends of the movable shell (6), two limiting rods (19) are fixedly connected between the plurality of stabilizing plates (17), and limiting rings (20) are fixedly connected to both ends of the screw nut (21), and the two limiting rings (20) are respectively slidably connected to the circumferential surfaces of the two limiting rods (19).

5. A tunnel grouting device according to claim 4, characterized in that: A liquid storage tank (1) is provided on one side of the movable shell (6), and a replenishing pipe (5) is fixedly connected between the liquid storage tank (1) and the movable shell (6). The slurry in the liquid storage tank (1) is pressurized in the liquid storage tank (1) through an external pump body and transported to the movable shell (6) through the replenishing pipe (5).

6. A tunnel grouting device according to claim 5, characterized in that: A connecting column (4) is fixedly connected between the circumferential surface of the liquid storage tank (1) and one end of the movable shell (6), and a control valve (12) is provided on the circumferential surface of the telescopic rod (10).

7. A tunnel grouting device according to claim 6, characterized in that: An L-rod (32) is fixedly connected to the side of the movable shell (6); a fixed block (30) is fixedly connected to the lower end of the L-rod (32); one end of the fixed block (30) is fixedly connected to a horizontal rod (25); a horizontal block (26) is slidably connected to the upper side of the horizontal rod (25); and the horizontal block (26) is fixed to the toothless surface of the rack (8).

8. A tunnel grouting device according to claim 7, characterized in that: Two transmission pipes (2) are fixedly connected to the upper end of the liquid storage tank (1), and the upper ends of the two transmission pipes (2) are both fixedly connected to a connecting flange (3).

9. A tunnel grouting device according to claim 8, characterized in that: A plurality of stirring rods (27) are driven to rotate in the liquid storage tank (1) by an electric roller, and the electric roller is fixed to the output end of the stirring motor.

10. A method for using a tunnel grouting device, characterized in that: A tunnel grouting device as claimed in claim 9 is used, comprising the following steps: S1: When grouting is required in the tunnel, the tunnel grouting device is set up at the position where grouting is required, the hollow drill bit (14) is first aligned with the grouting position, and then the motor (22) is started so that its output end drives the screw (18) to rotate, and then the screw nut (21) moves in the moving groove and drives the driving block (24) at the lower end of the push plate (28) to move leftward, and the driving block (24) drives the rack (8) to move leftward through the driving rod (7), and the rack (8) will mesh with the rotating gear (11), so that the telescopic rod (10) starts to rotate, and because the telescopic end of the telescopic rod (10) cooperates with the threaded groove of the middle partition plate (13), the telescopic end of the telescopic rod (10) rotates downward, so that the hollow drill bit (14) performs downward drilling operation; S2: When the push plate (28) moves to the left, the grouting liquid in the movable shell (6) is first pushed into the delivery pipe (9) through the delivery hole (29). When the drilling is completed, the cavity between the push plate (28) and the delivery pipe (9) is filled with the grouting liquid. At this time, there is a gap between the push plate (28) and the entrance of the delivery hole (29); S3: Finally, the control valve (12) is started to allow the grouting liquid in the delivery pipe (9) to flow into the hollow drill bit (14) along the delivery hole (31) and finally flow into the borehole. The motor (22) continues to drive the screw nut (21) and the push plate (28) to move. At this time, the space between the left side of the push plate (28) and the movable shell (6) gradually decreases, causing the pressure of the grouting liquid to gradually accumulate and form a back pressure, thereby ensuring that the grouting liquid is injected into the borehole at an appropriate pressure to complete the grouting treatment of the borehole. The grouting liquid can be stirred by the liquid storage tank (1) and the stirring rod (27) arranged therein to prevent solidification. The grouting liquid in the liquid storage tank (1) is transmitted to the movable shell (6) through the replenishing pipe (5).

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