Tunnel advance vibration grouting device and method

Abstract

This invention relates to the field of tunnel construction technology and discloses a tunnel pre-vibration grouting device and method. The grouting device includes a delivery pipe, a protective mechanism fixedly installed on the outer wall of the delivery pipe, and a reinforcement mechanism at the edge of the protective mechanism. The reinforcement mechanism is used to reinforce the wall of the grouting hole and is arranged along the axial direction of the delivery pipe. The protective mechanism includes a first movable block and a second movable block. This invention reduces the damage to the grouting hole caused by the vibration of the delivery pipe by setting a protective mechanism composed of a first movable block, a second movable block, a first cavity, and a second cavity on the outer wall of the delivery pipe. It absorbs the axial and radial vibrations caused by grout pulses without reducing the grouting speed, preventing further loosening of the loose strata and collapse and deformation of the grouting hole caused by vibration, solving the grout leakage problem, and ensuring grouting pressure to fully fill small gaps and eliminate reinforcement blind spots.

Description

Technical Field

[0001] This invention belongs to the field of tunnel engineering construction technology, specifically relating to a tunnel pre-vibration grouting device and method. Background Technology

[0002] Tunnel pre-vibration grouting is a pre-reinforcement technology for dense, low-permeability strata (such as fine sand, loess, silt, etc.). The core is to first loosen the strata through vibration (or micro-explosion), and then insert the delivery pipeline into the pre-drilled grouting holes for high-pressure grouting.

[0003] During the grouting process, the area to be reinforced has been vibrated and is in a relaxed state, resulting in weak overall structural strength. During grouting, as the grout is continuously output at high pressure, resonance occurs when the grout exits the pipe. The pipe exerts significant pressure on the relaxed stratum. Furthermore, the tunnel uses plunger-type grouting pumps, which do not deliver the grout at a uniform and steady flow but rather in a pulsed state. The pulse impact force continuously strikes the pipe wall, causing the delivery pipe to vibrate along with the grout. When the delivery pipe is inserted into the grouting hole, the vibration of the pipe further loosens the relaxed stratum. Prolonged vibration can cause the grouting hole near the pipe to collapse, leading to deformation of the grouting hole and making it prone to grout leakage.

[0004] Existing technologies generally reduce the vibration frequency and amplitude of pipelines by decreasing the grouting speed. However, decreasing the grouting speed will lead to a decrease in grout pressure. Grout that loses pressure will preferentially enter large cracks and will not be able to enter small cracks, resulting in grout not being able to enter the areas that should be reinforced, thus creating reinforcement blind spots. Summary of the Invention

[0005] This invention provides a tunnel pre-vibration grouting device and method, which solves the technical problems in related technologies where vibration of the delivery pipeline during tunnel pre-vibration grouting can easily lead to collapse of the grouting hole and leakage of grout, and that reducing the grouting speed can create reinforcement blind spots.

[0006] This invention provides a tunnel pre-vibration grouting device, including a conveying pipe, a protective mechanism fixedly installed on the outer wall of the conveying pipe, and a reinforcing mechanism provided at the edge of the protective mechanism. The reinforcing mechanism is used to reinforce the wall of the grouting hole and is arranged along the axial direction of the conveying pipe. The protective mechanism includes a first movable block and a second movable block. One end of the second movable block is slidably connected to the outer wall of the conveying pipe, and the other end of the second movable block is slidably connected to one end of the first movable block. A second cavity is formed at the junction of the conveying pipe and the second movable block. The second cavity is arranged along the axial direction of the conveying pipe. A first cavity is formed at the junction of the first movable block and the second movable block. The first cavity and the second cavity are perpendicular. The second movable block moves along the axial direction of the conveying pipe, and the first movable block moves along the radial direction of the conveying pipe.

[0007] Preferably, the end of the second movable block is integrally formed with a second connecting plate, the second connecting plate is slidably disposed inside the second cavity, a second guide rod is disposed on the inner wall of the second cavity, and the second connecting plate is slidably connected to the second guide rod.

[0008] Preferably, a second spring is fixedly connected to both sides of the second connecting plate, the other end of the second spring is fixedly connected to the end face of the second cavity, and the second spring is sleeved on the outer wall of the second guide rod.

[0009] Preferably, the other end of the second movable block is integrally formed with a first connecting plate, the first connecting plate is perpendicular to the second connecting plate, and a first guide rod is provided on the inner wall of the first cavity, and the first connecting plate and the first guide rod are slidably connected.

[0010] Preferably, a first spring is fixedly connected to both sides of the first connecting plate, the first spring is fixedly connected to the end face of the first cavity, and the first spring is sleeved on the outer wall of the first guide rod.

[0011] Preferably, the reinforcement mechanism includes two sets of partition mechanisms, each set of partition mechanisms including two partition plates, the partition plates being symmetrically distributed along the center line of the conveying pipeline, and the side of the partition plate facing the conveying pipeline having an integrally formed reinforcement plate.

[0012] Preferably, the end of the reinforcing plate is fixedly connected to a connecting end, and a transmission rod is threadedly connected between the two connecting ends. The transmission rod has threaded grooves in the area near both ends, and the spiral directions of the two threaded grooves are opposite.

[0013] Preferably, a bent plate is integrally formed at the corner of the connecting end, and a connecting rod is rotatably connected to the bent plate. A strip groove is opened at the junction of the connecting rod and the bent plate, and the ends of two adjacent connecting rods are rotatably connected.

[0014] Preferably, a hollow block is movably connected to the outer wall of the conveying pipe, and an operating lever is rotatably installed inside the hollow block. The operating lever is arranged radially along the conveying pipe. A driven bevel gear is integrally formed on the outer wall of the transmission rod. A mounting connecting plate is fixedly connected to one side of the first movable block by bolts. A gear shaft is rotatably installed between the mounting connecting plate and the hollow block. Both ends of the gear shaft are provided with bevel gears. One end of the gear shaft meshes with the driven bevel gear, and the other end of the gear shaft meshes with the operating lever.

[0015] A method for pre-vibration grouting in tunnels includes the following steps: Step 1, Pre-treatment stage: High-pressure air and clean water are used to clean the residual debris, dust, floating dust and broken loose rock inside the grouting hole. The actual hole diameter, verticality and depth of the grouting hole are measured with a hole diameter measuring instrument, the integrity of the hole wall is checked, and the matching of the inner diameter of the grouting hole with the maximum unfolded size and minimum shrinkage size of the partition plate is checked. Step 2, Installation and Commissioning Stage: Smoothly insert the grouting device into the grouting hole to the designed preset depth, ensuring that the conveying pipe is centered and without deviation. Manually rotate the control lever to make the partition plate expand outward synchronously and evenly press against the hole wall. Apply manual pressure along the axial and radial directions of the conveying pipe to simulate grouting pulse vibration, test the axial buffering and radial damping functions of the protection mechanism, and confirm that the first spring, the second spring and the movable block assembly operate smoothly and reset normally. Step 3, grouting operation stage: Start the grouting equipment to deliver grout. Utilize the spring buffer and friction energy absorption effect of the protection mechanism to continuously absorb the axial and radial vibrations caused by the grout pulses. During the operation, monitor the stability of the delivery pipeline, grouting pressure, flow rate, grout consistency and other parameters in real time. If pipeline shaking, abnormal pressure or micro-leakage of the borehole wall occurs, adjust the control lever in time to enhance the top support and tightness of the reinforcement mechanism. Step 4, Final Stage: After the designed grouting volume or grouting pressure is reached, stop grouting and maintain stable pressure for curing. Once the grout has initially solidified and the structure is stable, reverse the control lever to make the transmission rod drive the partition plate to retract and reset synchronously. Pull out the grouting device, avoiding scraping the hole wall. Clean the conveying pipeline, protection mechanism, reinforcement mechanism and transmission components in a timely manner, and remove residual grout and rock debris.

[0016] The beneficial effects of this invention are as follows: This invention reduces the damage to the grouting hole caused by the vibration of the conveying pipeline by setting a protective mechanism consisting of a first movable block, a second movable block, a first cavity, and a second cavity on the outer wall of the conveying pipeline. It can absorb the axial and radial vibrations caused by grout pulses without reducing the grouting speed, avoid further loosening of the loose strata and collapse and deformation of the grouting hole caused by vibration, solve the problem of grout leakage, and at the same time ensure the grouting pressure so that the grout can fully fill the small gaps and eliminate the reinforcement blind spots.

[0017] This invention employs a radially telescopic top support reinforcement mechanism, which can flexibly adjust the expansion range of the partition plate according to the actual diameter of the grouting hole, adapting to grouting holes of different sizes and stably centering and fixing the delivery pipeline, effectively preventing pipeline deviation and shaking. At the same time, it is combined with the anti-bending and limiting structure composed of the connecting end, bending plate and hinged connecting rod, replacing the traditional easily bent straight rod. Under harsh working conditions such as continuous vibration and hole wall collision, it can still maintain smooth transmission and reliable limiting, avoiding jamming failure due to component deformation, and significantly improving the stability, durability and construction safety of the device in complex strata and high-intensity grouting operations. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the end face structure of the present invention.

[0020] Figure 3This is a schematic diagram of the planar structure of the protection mechanism of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the reinforcement mechanism of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the partition plate and transmission rod of the present invention.

[0023] Figure 6 This is the present invention. Figure 5 Enlarged structural diagram of part A.

[0024] Figure 7 This is a schematic diagram of the transmission rod and gear shaft structure of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the control lever, gear shaft, and transmission rod of the present invention.

[0026] Figure 9 This is a schematic diagram of the method flow of the present invention.

[0027] In the diagram: 1. Conveying pipe; 2. Protection mechanism; 21. First movable block; 22. Second movable block; 23. First cavity; 24. First connecting plate; 25. First guide rod; 26. First spring; 27. Second cavity; 28. Second connecting plate; 29. ​​Second guide rod; 210. Second spring; 3. Reinforcing mechanism; 31. Partition plate; 32. Reinforcing plate; 33. Connecting end; 34. Bending plate; 35. Transmission rod; 36. Threaded groove; 37. Connecting rod; 38. Strip groove; 39. Driven bevel gear; 4. Control lever; 5. Gear shaft; 6. Hollow block; 7. Mounting connecting plate. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0029] Example 1 like Figure 1 , Figure 2 and Figure 3As shown, the system includes a conveying pipe 1, a protective mechanism 2 fixedly installed on the outer wall of the conveying pipe 1, and a reinforcing mechanism 3 provided at the edge of the protective mechanism 2. The reinforcing mechanism 3 is used to reinforce the wall of the grouting hole and is arranged along the axial direction of the conveying pipe 1. The protective mechanism 2 includes a first movable block 21 and a second movable block 22. One end of the second movable block 22 is slidably connected to the outer wall of the conveying pipe 1, and the other end of the second movable block 22 is slidably connected to one end of the first movable block 21. A second cavity 27 is provided at the junction of the conveying pipe 1 and the second movable block 22. The second cavity 27 is arranged along the axial direction of the conveying pipe 1. A first cavity 23 is provided at the junction of the first movable block 21 and the second movable block 22. The first cavity 23 is perpendicular to the second cavity 27. The second movable block 22 moves along the axial direction of the conveying pipe 1, and the first movable block 21 moves along the radial direction of the conveying pipe 1.

[0030] It should be noted that the protective mechanism 2 is connected to the reinforcing mechanism 3. During use, the reinforcing mechanism 3 directly contacts the wall of the grouting hole, while the protective mechanism 2 is located between the reinforcing mechanism 3 and the conveying pipe 1. It is used to reduce the impact of the vibration of the conveying pipe 1 on the grouting hole. The reinforcing mechanism 3 stably fixes the conveying pipe 1 in the grouting hole. When the conveying pipe 1 vibrates due to the impact of the grout, the conveying pipe 1 can be displaced relative to the first movable block 21 and the second movable block 22 without damaging the structure of the grouting hole. When the conveying pipe 1 vibrates axially, the conveying pipe 1 can move axially relative to the second movable block 22. The first cavity 23 provides axial movement space for the conveying pipe 1. When the conveying pipe 1 vibrates radially, the conveying pipe 1 and the second movable block 22 move radially together relative to the first movable block 21. The second cavity 27 provides radial movement space for the conveying pipe 1 and the second movable block 22.

[0031] Furthermore, such as Figure 3 As shown, a second connecting plate 28 is integrally formed at the end of the second movable block 22. The second connecting plate 28 is slidably disposed inside the second cavity 27. A second guide rod 29 is disposed on the inner wall of the second cavity 27. The second connecting plate 28 is slidably connected to the second guide rod 29. A second spring 210 is fixedly connected to both sides of the second connecting plate 28. The other end of the second spring 210 is fixedly connected to the end face of the second cavity 27. The second spring 210 is sleeved on the outer wall of the second guide rod 29. A first connecting plate 24 is integrally formed at the other end of the second movable block 22. The first connecting plate 24 is perpendicular to the second connecting plate 28. A first guide rod 25 is disposed on the inner wall of the first cavity 23. The first connecting plate 24 is slidably connected to the first guide rod 25. A first spring 26 is fixedly connected to both sides of the first connecting plate 24. The first spring 26 is fixedly connected to the end face of the first cavity 23. The first spring 26 is sleeved on the outer wall of the first guide rod 25.

[0032] It should be noted that the second connecting plate 28 at one end of the second movable block 22 is used to connect the second guide rod 29, and the first connecting plate 24 at the other end is connected to the first guide rod 25, thereby connecting the first movable block 21 and the conveying pipe 1. When the conveying pipe 1 moves axially relative to the second movable block 22, the second guide rod 29 determines the movement path of the conveying pipe 1, and according to the different movement directions of the conveying pipe 1, it will compress one second spring 210 in the movement direction and stretch the other second spring 210. When the pulse impact force is interrupted, the rebound of the two second springs 210 can pull the conveying pipe 1 back to the initial position. During this process, the friction between the second connecting plate 28 and the conveying pipe 1 can absorb most of the friction. When the conveying pipe 1 vibrates radially, it will directly drive the second movable block 22, causing it to move radially relative to the first movable block 21. During this process, the first guide rod 25 determines the movement path of the second movable block 22. As the second movable block 22 moves, it compresses one first spring 26 and stretches another first spring 26 in the direction of movement. When the pulse impact force is interrupted, the rebound of the two first springs 26 can pull the conveying pipe 1 back to its initial position. During this process, the friction between the first connecting plate 24 and the first movable block 21 can absorb most of the mechanical kinetic energy, thereby reducing the impact of the vibration of the conveying pipe 1 on the grouting hole.

[0033] Example 2 like Figure 2 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, even though the impact of vibration of the conveying pipeline 1 on the grouting hole is reduced by setting the protection mechanism 2, a small amount of vibration will still affect the grouting hole, causing the grouting hole to be easily deformed. In order to protect the grouting hole, this application further provides the following technical solution.

[0034] The reinforcement mechanism 3 includes two sets of separation mechanisms. Each set of separation mechanisms includes two separation plates 31. The separation plates 31 are symmetrically distributed along the center line of the conveying pipe 1. A reinforcement plate 32 is integrally formed on the side of the separation plate 31 facing the conveying pipe 1. A connecting end 33 is fixedly connected to the end of the reinforcement plate 32. A transmission rod 35 is threaded between the two connecting ends 33. Threaded grooves 36 are opened in the area near both ends of the transmission rod 35, and the spiral directions of the two threaded grooves 36 are opposite. A hollow block 6 is movably connected to the outer wall of the conveying pipe 1. An operating lever 4 is rotatably installed inside the hollow block 6. The operating lever 4 is arranged radially along the conveying pipe 1. A driven bevel gear 39 is integrally formed on the outer wall of the transmission rod 35. A mounting connecting plate 7 is fixedly connected to one side of the first movable block 21 by bolts. A gear shaft 5 is rotatably installed between the mounting connecting plate 7 and the hollow block 6. Both ends of the gear shaft 5 are provided with bevel gears. One end of the gear shaft 5 meshes with the driven bevel gear 39, and the other end of the gear shaft 5 meshes with the operating lever 4.

[0035] It should be noted that the partition plate 31 is specifically arc-shaped, and the reinforcing plate 32 is located on the side facing the conveying pipe 1 to improve the structural strength of the partition plate 31 and determine its position. The connecting end 33 located at the end of the reinforcing plate 32 is used to connect the transmission rod 35. It has a threaded hole inside that matches the transmission rod 35 and the threaded groove 36. When the reinforcing plate 32 is pushed against the wall of the grouting hole, the operating lever 4 located on the hollow block 6 is rotated. When the operating lever 4 rotates, it drives the gear shaft 5. The gear shaft 5 simultaneously meshes with the driven bevel gear 39 on the transmission rod 35 to drive the transmission rod 35. During the rotation of the transmission rod 35, it pushes the connecting end 33 connected to it through the threaded groove 36 on its body. This achieves the purpose of simultaneously pushing the two partition plates 31 to move in opposite directions. Depending on the direction of rotation of the control lever 4, the rotation direction of the transmission rod 35 is also different, thus achieving the purpose of changing the moving direction of the partition plate 31. The part of the transmission rod 35 with the driven bevel gear 39 is located inside the first movable block 21. The first movable block 21 is used to protect the driven bevel gear 39 and one end of the gear shaft 5. The hollow block 6 is used to protect the other end of the gear shaft 5. The hollow block 6 is connected to the conveying pipe 1 through another protective mechanism 2 to prevent the conveying pipe 1 from driving the first movable block 21 through the gear shaft 5. The mounting connecting plate 7 is connected to the first movable block 21 by bolts, which encloses the first movable block 21 and ensures the stability of the gear shaft 5.

[0036] Example 3 like Figure 5 and Figure 6As shown, in order to ensure that the two connecting ends 33 do not rotate with the transmission rod 35, a straight rod is usually connected between the two connecting ends 33 to limit the connecting ends 33 to only move in a straight line. However, in actual use, the grouting device needs to be inserted into the grouting hole, which is prone to collision with the hole wall. Moreover, the conveying pipe 1 is in a state of continuous vibration under the impact of the grout. At this time, the straight rod is prone to bending due to vibration and external impact, which will affect the normal movement of the connecting ends 33 and limit its range of movement. In order to avoid the straight rod from bending due to vibration and external impact, this application further provides the following technical solution.

[0037] A bent plate 34 is integrally formed at the corner of the connecting end 33. A connecting rod 37 is rotatably connected to the bent plate 34. A strip groove 38 is provided at the junction of the connecting rod 37 and the bent plate 34. The ends of two adjacent connecting rods 37 are rotatably connected.

[0038] It should be noted that the two connecting ends 33 are connected by a bending plate 34 and a connecting rod 37. When the connecting end 33 is pushed by the transmission rod 35, the two connecting rods 37 will rotate simultaneously. The ends of the connecting rods 37 will rotate around the bending plate 34, but the state of the connecting end 33 can still be restricted to prevent it from rotating with the transmission rod 35. Furthermore, this connection method will not be affected by external collisions and vibrations of the conveying pipe 1, ensuring that the partition plate 31 can still move normally under high-intensity vibration and collision conditions.

[0039] Example 4 like Figure 9 As shown, a method for tunnel pre-vibration grouting includes the following steps: Step 1, Pre-treatment stage: High-pressure air and clean water are used to clean the residual debris, dust, floating dust and broken loose rock inside the grouting hole. The actual hole diameter, verticality and depth of the grouting hole are measured with a hole diameter measuring instrument, the integrity of the hole wall is checked, and the matching of the inner diameter of the grouting hole with the maximum unfolded size and minimum shrinkage size of the partition plate 31 is checked.

[0040] Step 2, Installation and Commissioning Stage: Smoothly insert the grouting device into the grouting hole to the designed preset depth, ensuring that the conveying pipe 1 is centered and without deviation. Manually rotate the control lever 4 to make the partition plate 31 expand outward synchronously and evenly press against the hole wall. Apply manual pressure along the axial and radial directions of the conveying pipe 1 to simulate grouting pulse vibration and test the axial buffering and radial damping functions of the protection mechanism 2. Confirm that the first spring 26, the second spring 210, and the movable block assembly operate smoothly and reset normally.

[0041] Step 3, grouting operation stage: Start the grouting equipment to deliver grout. Utilize the spring buffer and friction energy absorption effect of the protection mechanism 2 to continuously absorb the axial and radial vibrations caused by the grout pulses. During the operation, monitor the stability of the delivery pipeline 1, grouting pressure, flow rate, grout consistency and other parameters in real time. If pipeline shaking, abnormal pressure or micro-leakage of the borehole wall occurs, adjust the control lever 4 in time to enhance the top support and tightness of the reinforcement mechanism 3.

[0042] Step 4, Final Stage: After the designed grouting volume or grouting pressure is reached, stop grouting and maintain stable pressure for curing. Once the grout has initially solidified and the structure is stable, rotate the control lever 4 in the reverse direction to make the transmission lever 35 drive the partition plate 31 to retract and reset synchronously. Pull out the grouting device to avoid scraping the hole wall. Clean the conveying pipeline 1, protection mechanism 2, reinforcement mechanism 3 and transmission components in a timely manner to remove residual grout and rock debris.

[0043] Working principle of the invention: When deploying the grouting device, firstly, when the control lever 4 is turned, the gear shaft 5 is driven to rotate. The gear shaft 5 drives the driven bevel gear 39 and the transmission rod 35 to rotate through the meshing of the bevel gear. Since the transmission rod 35 has reverse thread grooves 36 at both ends, when it rotates, it will push the two connecting ends 33 to move synchronously in opposite directions, thereby driving the partition plate 31 to expand or retract towards the hole wall, so as to adapt to grouting holes of different diameters.

[0044] The connecting end 33 is rotatably connected to the connecting rod 37 via the bending plate 34. The two connecting rods 37 are also rotatably connected. This not only restricts the connecting end 33 from rotating with the transmission rod 35 and ensures the linear movement of the partition plate 31, but also avoids the bending problem caused by vibration and collision in traditional straight rod structures. This ensures the normal operation of the reinforcement mechanism 3 in high-intensity vibration environments. The reinforcement mechanism 3 fits tightly against the hole wall through the partition plate 31, which not only stably fixes the conveying pipe 1, but also protects the hole wall.

[0045] When the conveying pipe 1 vibrates axially due to the impact of slurry, the conveying pipe 1 moves axially along the second guide rod 29, compressing one second spring 210 in the direction of movement and stretching the other second spring 210. The friction between the second connecting plate 28 and the conveying pipe 1 absorbs the vibration kinetic energy. When the pulse impact force is intermittent, the elastic restoring force of the two second springs 210 drives the conveying pipe 1 to reset, thus achieving the buffering of axial vibration.

[0046] When the conveying pipe 1 generates radial vibration, the conveying pipe 1 drives the second movable block 22 to move radially along the first guide rod 25, compressing one first spring 26 and stretching the other first spring 26. The friction between the first connecting plate 24 and the first movable block 21 absorbs kinetic energy. After the vibration weakens, the first spring 26 drives the second movable block 22 and the conveying pipe 1 to reset, preventing the radial vibration from being transmitted to the hole wall. Through the elastic reset of the first spring 26 and the second spring 210, the friction between the second connecting plate 28 and the conveying pipe 1, and the friction between the first connecting plate 24 and the first movable block 21, the vibration is adaptively buffered without the need for additional adjustment, effectively reducing the impact of vibration on the hole wall.

[0047] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A tunnel advance vibration grouting device comprising a delivery pipe (1), characterized in that: A protective mechanism (2) is fixedly installed on the outer wall of the conveying pipeline (1), and a reinforcing mechanism (3) is provided at the edge of the protective mechanism (2). The reinforcing mechanism (3) is used to reinforce the wall of the grouting hole and is arranged along the axial direction of the conveying pipeline (1). The protection mechanism (2) includes a first movable block (21) and a second movable block (22). One end of the second movable block (22) is slidably connected to the outer wall of the conveying pipe (1), and the other end of the second movable block (22) is slidably connected to one end of the first movable block (21). A second cavity (27) is provided at the junction of the conveying pipe (1) and the second movable block (22). The second cavity (27) is arranged along the axial direction of the conveying pipe (1). A first cavity (23) is provided at the junction of the first movable block (21) and the second movable block (22). The first cavity (23) is perpendicular to the second cavity (27). The second movable block (22) moves along the axial direction of the conveying pipe (1), and the first movable block (21) moves along the radial direction of the conveying pipe (1).

2. The tunnel advance vibration grouting device according to claim 1, characterized in that, The end of the second movable block (22) is integrally formed with a second connecting plate (28), which is slidably disposed inside the second cavity (27). A second guide rod (29) is disposed on the inner wall of the second cavity (27), and the second connecting plate (28) and the second guide rod (29) are slidably connected.

3. The tunnel advance vibration grouting device according to claim 2, characterized in that, The second connecting plate (28) is fixedly connected to both sides of the second spring (210), and the other end of the second spring (210) is fixedly connected to the end face of the second cavity (27). The second spring (210) is sleeved on the outer wall of the second guide rod (29).

4. The tunnel advance vibration grouting device according to claim 3, characterized in that, The other end of the second movable block (22) is integrally formed with a first connecting plate (24), the first connecting plate (24) is perpendicular to the second connecting plate (28), and a first guide rod (25) is provided on the inner wall of the first cavity (23). The first connecting plate (24) and the first guide rod (25) are slidably connected.

5. A tunnel pre-vibration grouting device according to claim 4, characterized in that, The first connecting plate (24) is fixedly connected to both sides of the first spring (26), and the first spring (26) is fixedly connected to the end face of the first cavity (23). The first spring (26) is sleeved on the outer wall of the first guide rod (25).

6. A tunnel pre-vibration grouting device according to claim 5, characterized in that, The reinforcement mechanism (3) includes two sets of separation mechanisms. Each set of separation mechanisms includes two separation plates (31). The separation plates (31) are symmetrically distributed along the midline of the conveying pipe (1). The side of the separation plate (31) facing the conveying pipe (1) is integrally formed with a reinforcement plate (32).

7. A tunnel pre-vibration grouting device according to claim 6, characterized in that, The end of the reinforcing plate (32) is fixedly connected to a connecting end (33), and a transmission rod (35) is threaded between the two connecting ends (33). The transmission rod (35) has threaded grooves (36) in the area near both ends, and the spiral directions of the two threaded grooves (36) are opposite.

8. A tunnel pre-vibration grouting device according to claim 7, characterized in that, A bent plate (34) is integrally formed at the corner of the connecting end (33). A connecting rod (37) is rotatably connected to the bent plate (34). A strip groove (38) is provided at the junction of the connecting rod (37) and the bent plate (34). The ends of two adjacent connecting rods (37) are rotatably connected.

9. A tunnel pre-vibration grouting device according to claim 8, characterized in that, A hollow block (6) is movably connected to the outer wall of the conveying pipe (1). A control lever (4) is rotatably installed inside the hollow block (6). The control lever (4) is arranged radially along the conveying pipe (1). A driven bevel gear (39) is integrally formed on the outer wall of the transmission rod (35). A mounting connecting plate (7) is fixedly connected to one side of the first movable block (21) by bolts. A gear shaft (5) is rotatably installed between the mounting connecting plate (7) and the hollow block (6). Both ends of the gear shaft (5) are provided with bevel gears. One end of the gear shaft (5) meshes with the driven bevel gear (39), and the other end of the gear shaft (5) meshes with the control lever (4).

10. A method for tunnel pre-vibration grouting, using the tunnel pre-vibration grouting device as described in claim 9, characterized in that, Includes the following steps: Step 1, Pre-treatment stage: High-pressure air and clean water are used to clean the residual debris, dust, floating dust and broken loose rock inside the grouting hole. The actual hole diameter, verticality and depth of the grouting hole are measured using a hole diameter detector. The integrity of the hole wall is checked and the matching of the inner diameter of the grouting hole with the maximum unfolded size and minimum shrinkage size of the partition plate (31) is checked. Step 2, Installation and Debugging Stage: Smoothly insert the grouting device into the grouting hole to the designed preset depth, ensuring that the conveying pipe (1) is centered and without deviation. Manually rotate the control lever (4) to make the partition plate (31) expand outward synchronously and evenly press against the hole wall. Apply manual pressure along the axial and radial directions of the conveying pipe (1) to simulate grouting pulse vibration and test the axial buffering and radial damping functions of the protection mechanism (2). Confirm that the first spring (26), the second spring (210) and the moving block assembly operate smoothly and reset normally. Step 3, grouting operation stage: start the grouting equipment to deliver grout. Utilize the spring buffer and friction energy absorption effect of the protection mechanism (2) to continuously absorb the axial and radial vibrations caused by the grout pulse. During the operation, monitor the stability of the delivery pipeline (1), grouting pressure, flow rate, grout consistency and other parameters in real time. If the pipeline shakes, the pressure is abnormal or the hole wall leaks slightly, adjust the control lever (4) in time to enhance the top support and tightness of the reinforcement mechanism (3). Step 4, Final stage: After the designed grouting volume or grouting pressure is reached, stop grouting and maintain stable pressure for curing. When the grout has initially solidified and the structure is stable, rotate the control lever (4) in the opposite direction to make the transmission rod (35) drive the partition plate (31) to retract and reset synchronously. Pull out the grouting device to avoid scraping the hole wall. Clean the conveying pipeline (1), protection mechanism (2), reinforcement mechanism (3) and transmission components in time to remove residual grout and rock debris.

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