A landslide trailing edge crack grouting machine and grouting method

Abstract

This invention provides a grouting machine and grouting method for cracks at the rear edge of a landslide, belonging to the technical field of grouting machines. It includes a grouting machine body and a pre-embedded pipe, which is embedded within the crack. A grouting pipe is connected to the grout outlet of the grouting machine body via a pipeline. During use, the grouting pipe is inserted into the pre-embedded pipe. The invention also includes a sealing assembly, which includes a support ring fixedly fitted onto the surface of the grouting pipe, and multiple movable rings movably fitted onto the surface of the grouting pipe. By setting up the sealing assembly, the arc-shaped contact surface of the protrusion allows the rubber ring to evenly conform to the inner wall of the protrusion when it expands, avoiding stress concentration at the edges of the rubber ring that could cause localized damage. When the rubber ring conforms to the inside of the arc-shaped protrusion, it can also adapt to minor unevenness, eccentricity, and deformation of the pipe wall, effectively filling gaps and increasing the sealing contact area, thereby improving the sealing performance of the contact surface and reducing the possibility of grout leakage.

Description

Technical Field

[0001] This invention relates to the field of grouting machine technology, and in particular to a grouting machine and grouting method for cracks at the rear edge of a landslide. Background Technology

[0002] The cracks at the rear edge of a landslide are continuous cracks formed at the top of the landslide body under tension. They are mostly soil or contain gravel and rock, are narrow and deep, and are an important indicator of mountain instability. They easily allow rainwater to seep in, exacerbating the sliding. It is necessary to use a grouting machine in conjunction with a grouting plug to deal with them in time. The grouting machine is a geotechnical reinforcement device that delivers grout under high pressure. It is mainly composed of a power unit, pump body, grouting pipeline, pressure gauge, storage tank and control valve. The grouting plug is a sealing and isolation component that can be tightened and fixed in the hole to prevent grout backflow. When using it, first clean the cracks, drill holes and bury pipes, put in the grouting plug and tighten it to seal the hole section, stir the grout and connect the equipment, grout slowly at low pressure, observe the pressure and grout leakage, stop when the design pressure is reached or no more grout is drawn, loosen the grouting plug, seal the pipe and pull out the pipe to achieve filling and consolidation, sealing of seepage and stabilization of the landslide body.

[0003] The inner wall of the pre-embedded straight pipe is cylindrical. When it comes into contact with the grouting plug, the sealing area is limited, and micro-gaps are easily left. During high-pressure grouting, the grout is prone to seep and leak along the contact surface. Therefore, this application provides a grouting machine and grouting method for cracks at the rear edge of a landslide to meet the requirements. Summary of the Invention

[0004] This invention provides a grouting machine and grouting method for cracks at the rear edge of landslides to solve the problem of grout leakage along the contact surface during high-pressure grouting.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A grouting machine and grouting method for cracks at the rear edge of a landslide include a grouting machine body and a pre-embedded pipe. The pre-embedded pipe is embedded in the crack. The grout outlet of the grouting machine body is connected to the grouting pipe via a pipeline. In use, the grouting pipe is inserted into the pre-embedded pipe. The method also includes: The sealing assembly includes a support ring fixedly sleeved on the surface of the grouting pipe, multiple movable rings movably sleeved on the surface of the grouting pipe, the bottom of the lowest movable ring being attached to the top of the support ring, rubber rings being fixed between adjacent movable rings, a driving assembly being provided on the top of the highest movable ring, and multiple arc-shaped protrusions integrally formed on the surface of the pre-embedded pipe. In use, the drive assembly drives the rubber ring to expand and fit against the inner wall of the protrusion.

[0006] Preferably, the drive assembly includes an internally threaded ring threaded onto the surface of the grouting pipe, a long handle symmetrically fixed to the surface of the internally threaded ring, a sleeve movably fitted onto the surface of the grouting pipe, the bottom of the internally threaded ring fitting against the top of the sleeve, and the bottom of the sleeve fitting against the top of the uppermost movable ring.

[0007] Preferably, the top of the pre-embedded pipe is provided with a slot, and a locking block is fixed on the surface of the sleeve. When in use, the locking block is engaged in the slot.

[0008] Preferably, the bottom of the support ring movably passes through the limiting block, the top of the limiting block is fixed to the bottom of the lowest moving ring, and the bottom of the limiting block is fixed with a limiting plate, which fits against the bottom of the support ring.

[0009] Preferably, the rubber ring is provided with an expansion component inside, which is used to assist the rubber ring in fitting against the inner wall of the protrusion.

[0010] Preferably, the expansion assembly includes multiple extrusion rings and multiple extrusion plates, which are evenly distributed between multiple adjacent moving rings. The top of the extrusion ring is fixed to the bottom of the upper moving ring, and a connecting strip is fixed to the bottom of the extrusion plate. The bottom of the connecting strip is fixed to the top of the lower moving ring. A spring sheet is fixed to the side of the extrusion plate facing the rubber ring, and the spring sheet is fixed to the top of the lower moving ring. When the moving rings approach each other, the extrusion rings squeeze the extrusion plates to expand outward.

[0011] Preferably, the extrusion sheet has an integrally formed extrusion portion on the side facing the rubber ring and located at the top. The extrusion portion is arc-shaped and fits against the inner wall of the rubber ring.

[0012] Preferably, the inner wall of the rubber ring is fixed with multiple protrusions, which are staggered with multiple extrusion plates. The side of the protrusion away from the rubber ring is arc-shaped. A cavity is opened inside the protrusion and filled with high-pressure gas. A U-shaped skeleton is fixed on the inner wall of the cavity. The opening of the U-shaped skeleton faces the side away from the rubber ring. An extrusion strip is fixed between adjacent extrusion plates and the extrusion strip is attached to the arc-shaped side of the protrusion.

[0013] Preferably, the surface of the rubber ring is fixedly fitted with multiple convex rings, and a cavity II is opened inside the convex rings, with a nylon layer fixed to the inner wall of the cavity II.

[0014] A method for grouting cracks at the rear edge of a landslide, applied to a landslide crack grouting machine as described above, includes the following steps: S1: The pre-embedded pipe is embedded in the crack; S2: The grouting pipe is inserted into the pre-embedded pipe, and the gap between the grouting pipe and the pre-embedded pipe is sealed by the sealing component; S3: Start the grouting machine to perform grouting; S4: After grouting is completed, loosen the sealing component and pull out the grouting pipe.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting a sealing component, the arc-shaped contact surface of the protrusion can make the rubber ring fit evenly against the inner wall of the protrusion when it expands, avoiding stress concentration at the edges of the rubber ring that could cause localized damage to the rubber. When the rubber ring fits inside the arc-shaped protrusion, it can also adapt to minor unevenness, eccentricity and deformation of the pipe wall, effectively filling gaps and increasing the sealing contact area, thereby improving the sealing performance of the contact surface and reducing the possibility of grout leakage at the contact surface.

[0016] By setting a slot and a block, the block is inserted into the slot, at which point the rubber ring corresponds exactly to the protrusion, eliminating the need for multiple height adjustments and improving operational convenience. Secondly, the cooperation between the slot and the block restricts the rotation of the grouting pipe. During the rotation of the internal threaded ring, there is no need to use pipe wrenches to fix the grouting pipe, further improving operational convenience.

[0017] By incorporating an expansion assembly, during the expansion of the rubber ring, adjacent moving rings approach each other, and the compression ring squeezes the compression plate, causing the compression plate to rotate towards the rubber ring. After the outer wall of the rubber ring adheres to the inner wall of the protrusion, the compression plate simultaneously squeezes the rubber ring from its inner wall, making the fit between the rubber ring and the protrusion tighter, thereby improving the sealing performance between the rubber ring and the protrusion. Furthermore, the outer diameter of the expanded compression plate is larger than the inner diameter of the grouting pipe. Therefore, if an accident occurs during grouting or the grouting pressure is too high, the compression plate will lock into the inside of the protrusion, preventing the grouting pipe from detaching from the pre-embedded pipe. This prevents the grouting pipe from splashing out and causing injury, thus improving overall safety during use.

[0018] By setting an extrusion section, which is arc-shaped, the extrusion force can be evenly distributed across the entire contact surface, avoiding direct compression of the inner wall of the rubber ring by right angles or sharp corners. This prevents the rubber ring from being locally crushed under high pressure and extends its service life.

[0019] By setting ridges between adjacent extrusion sheets, the ridges can guide the extrusion sheets during bending, preventing them from twisting during rotation and improving their stability during bending.

[0020] When the extrusion plate bends outward and squeezes the rubber ring, there are gaps between adjacent extrusion plates. The extrusion plate cannot squeeze the rubber ring in this gap, resulting in a relatively poor seal between the rubber ring and the protrusion in this area compared to the part squeezed by the extrusion plate. Therefore, after the extrusion plate opens, it will drive the extrusion belt to squeeze the protrusion. The protrusion will transfer the extrusion force to the rubber ring, thereby improving the seal between this part of the rubber ring and the protrusion, making the overall seal of the rubber ring higher.

[0021] A cavity is created inside the protrusion, and high-pressure gas is filled into the cavity. The protrusion will expand, and its interaction with the extrusion band can further improve the sealing between the rubber ring and the protrusion.

[0022] A U-shaped frame is installed inside the cavity. The U-shaped frame can prevent the convex strip from expanding towards the extrusion plate, and prevent the expanded convex strip from affecting the rotation of the extrusion plate, thus ensuring the stability of the device during use. At the same time, the extrusion pressure of the extrusion belt can be directly transmitted to the rubber ring through the U-shaped frame, reducing the loss in the process of extrusion pressure transmission and ensuring the sealing between the rubber ring and the convex part.

[0023] By setting a convex ring, after the rubber ring contacts the protrusion, part of the extrusion force acts directly on the convex ring. Since the surface area of ​​the convex ring is smaller, the pressure generated will be higher, thus forming multiple protective lines and further improving its sealing performance. If the grouting pipe experiences slight axial displacement, the setting of cavity two can reduce stress concentration inside the convex ring during the twisting process, reduce the possibility of convex ring damage, and improve the durability of the convex ring. Secondly, when the convex ring twists, sliding friction will occur on the inner wall of cavity two. The nylon layer can reduce the coefficient of friction of the inner wall of cavity two, thereby reducing the wear of the convex ring and further improving the durability of the convex ring. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the pre-embedded pipe structure of the present invention; Figure 3 This is a schematic diagram of the sealing component of the present invention; Figure 4 This is a cross-sectional view of the pre-embedded pipe section of the present invention; Figure 5 This is a cross-sectional view of the rubber ring of the present invention; Figure 6 This is a cross-sectional view of the extruded sheet section of the present invention; Figure 7 This is a cross-sectional view of the protruding ring of the present invention; Figure 8 This is a schematic diagram of the extrusion sheet structure of the present invention; Figure 9 This is a cross-sectional view of the protruding strip of the present invention.

[0025] In the diagram: 1. Grouting machine body; 2. Grouting pipe; 3. Sealing assembly; 4. Internal threaded ring; 5. Sleeve; 6. Support ring; 7. Moving ring; 8. Rubber ring; 9. Extrusion ring; 10. Extrusion plate; 11. Connecting strip; 12. Extrusion section; 13. Spring; 14. Limiting block; 15. Limiting plate; 16. Protruding ring; 17. Nylon layer; 18. Protruding strip; 19. U-shaped skeleton; 20. Extrusion strip; 21. Embedded pipe; 22. Protrusion; 23. Slot; 24. Locking block.

[0026] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0027] The following is a detailed description of a landslide back-edge crack grouting machine and grouting method provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; for some known technologies, those skilled in the art can also use other alternative methods to implement the invention; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0028] like Figures 1-9 As shown, an embodiment of the present invention provides a grouting machine and grouting method for cracks at the rear edge of a landslide, including a grouting machine body 1 and a pre-embedded pipe 21. The pre-embedded pipe 21 is pre-embedded in the crack. The grout outlet of the grouting machine body 1 is connected to a grouting pipe 2 via a pipeline. In use, the grouting pipe 2 is inserted into the pre-embedded pipe 21. The invention also includes: The sealing component 3 includes a support ring 6 fixedly sleeved on the surface of the grouting pipe 2, and multiple movable rings 7 movably sleeved on the surface of the grouting pipe 2. The bottom of the lowermost movable ring 7 is attached to the top of the support ring 6. A rubber ring 8 is fixed between adjacent movable rings 7. A driving component is provided on the top of the uppermost movable ring 7. Multiple arc-shaped protrusions 22 are integrally formed on the surface of the pre-embedded pipe 21. like Figure 2As shown in this embodiment, the driving component includes an internally threaded ring 4 threaded onto the surface of the grouting pipe 2. A long handle is symmetrically fixed to the surface of the internally threaded ring 4. A sleeve 5 is movably fitted onto the surface of the grouting pipe 2. The bottom of the internally threaded ring 4 is attached to the top of the sleeve 5, and the bottom of the sleeve 5 is attached to the top of the uppermost moving ring 7. The internally threaded ring 4, threaded onto the surface of the grouting pipe 2, is used to transmit driving force, moving itself up and down by rotation, thereby squeezing the sleeve 5. The long handle, symmetrically fixed to the surface of the internally threaded ring 4, provides a force point for the worker, facilitating rotation of the internally threaded ring 4 with ease and without the need for additional tools. The sleeve 5, movably fitted onto the surface of the grouting pipe 2, transmits the squeezing force of the internally threaded ring 4, evenly transferring the downward pressure of the internally threaded ring 4 to the uppermost moving ring 7, preventing uneven force distribution on the moving ring 7. The bottom of the sleeve 5 is attached to the uppermost moving ring 7, ensuring stable transmission of squeezing force and causing all moving rings 7 to move closer to each other synchronously. During use, the drive assembly drives the rubber ring 8 to expand and adhere to the inner wall of the protrusion 22. The grouting machine body 1 is used to store and transport grouting material, providing power for grouting the cracks at the rear edge of the landslide. The pre-embedded pipe 21 is pre-embedded in the cracks at the rear edge of the landslide to guide the grouting material to penetrate evenly into the crack, preventing leakage and ensuring the grouting filling effect. The grouting pipe 2 is connected to the grout outlet of the grouting machine body 1 through a pipeline to transport the grouting material into the pre-embedded pipe 21. When in use, it is inserted into the pre-embedded pipe 21 to achieve precise delivery of the grouting material. The sealing assembly 3 is used to seal the gap between the grouting pipe 2 and the pre-embedded pipe 21 to prevent grout leakage during the grouting process and ensure stable grouting pressure. Ring 6 is fixedly sleeved on the surface of grouting pipe 2 to support the lowermost movable ring 7, providing force support for the movable ring 7 and ensuring stable movement of the movable ring 7; movable ring 7 is movably sleeved on the surface of grouting pipe 2 to compress rubber ring 8, and by moving closer together, rubber ring 8 expands; rubber ring 8 is fixed between adjacent movable rings 7 to seal the gap between grouting pipe 2 and pre-embedded pipe 21, and after expansion, it fits against the inner wall of pre-embedded pipe 21 to achieve a seal; the drive assembly is used to drive the movable rings 7 to move closer together, providing power for the expansion of rubber ring 8; protrusion 22 is integrally formed on the surface of pre-embedded pipe 21, and is arc-shaped, to increase the contact area with rubber ring 8, while avoiding stress concentration at the edges of rubber ring 8.

[0029] like Figure 2 As shown in this embodiment, the top of the pre-embedded pipe 21 is provided with a slot 23, and the surface of the sleeve 5 is fixed with a locking block 24. When in use, the locking block 24 is engaged in the slot 23. The slot 23 is opened at the top of the pre-embedded pipe 21 to engage the locking block 24, thereby positioning the sleeve 5 and the pre-embedded pipe 21 and restricting the rotation of the grouting pipe 2. The locking block 24 is fixed on the surface of the sleeve 5 to cooperate with the slot 23 to achieve positioning and anti-rotation, ensuring that the rubber ring 8 and the protrusion 22 are precisely aligned.

[0030] like Figure 6 As shown in this embodiment, the bottom of the support ring 6 movably passes through the limiting block 14, the top of the limiting block 14 is fixed to the bottom of the lowest moving ring 7, and the bottom of the limiting block 14 is fixed with a limiting plate 15. The limiting plate 15 is attached to the bottom of the support ring 6. The limiting block 14 movably passes through the bottom of the support ring 6 and is fixed to the bottom of the lowest moving ring 7. This is used to limit the rotation of the moving ring 7, ensuring that the moving ring 7 can only move up and down along the axial direction of the grouting pipe 2, and to avoid the rotation of the moving ring 7 causing the rubber ring 8 to twist or shift, affecting the sealing effect. The limiting plate 15 is fixed to the bottom of the limiting block 14 and is attached to the bottom of the support ring 6. This is used to limit the upward movement distance of the limiting block 14, thereby limiting the upward movement distance of the lowest moving ring 7, preventing the moving ring 7 from moving too upward and causing the rubber ring 8 to be over-compressed and damaged, and at the same time preventing the limiting block 14 from detaching from the support ring 6.

[0031] like Figure 5 and Figure 6 As shown in this embodiment, the rubber ring 8 is internally provided with an expansion assembly. The expansion assembly is used to assist the rubber ring 8 in fitting against the inner wall of the protrusion 22. The expansion assembly includes multiple compression rings 9 and multiple compression plates 10. The multiple compression rings 9 and multiple compression plates 10 are evenly distributed between multiple adjacent moving rings 7. The top of the compression ring 9 is fixed to the bottom of the upper moving ring 7. The bottom of the compression plate 10 is fixed with a connecting strap 11, and the bottom of the connecting strap 11 is fixed to the top of the lower moving ring 7. A spring piece 13 is fixed to the side of the compression plate 10 facing the rubber ring 8. The spring piece 13 is fixed to the top of the lower moving ring 7. When the moving rings 7 approach each other, the compression rings 9 compress the compression plates 10 to expand outward. The extrusion ring 9 is fixed to the bottom of the upper moving ring 7 and is used to extrude the extrusion plate 10 when the moving rings 7 approach each other, providing power for the expansion of the extrusion plate 10. The extrusion plate 10 is fixed to the top of the lower moving ring 7 through the connecting belt 11 and is used to extrude the rubber ring 8 from the inside, assisting the expansion of the rubber ring 8 and preventing it from falling off. The connecting belt 11 is used to connect the extrusion plate 10 and the lower moving ring 7, allowing the extrusion plate 10 to rotate around the connecting belt 11 and providing room for the expansion of the extrusion plate 10. The spring plate 13 is fixed to the side of the extrusion plate 10 facing the rubber ring 8 and the top of the lower moving ring 7 and is used to provide reset power for the extrusion plate 10, driving the extrusion plate 10 back to its initial position after grouting is completed.

[0032] like Figure 6 and Figure 8As shown, in this embodiment, the extrusion sheet 10 has an integrally formed extrusion part 12 on the side facing the rubber ring 8 and at the top. The extrusion part 12 is arc-shaped and fits against the inner wall of the rubber ring 8. The extrusion part 12 is integrally formed on the top of the side of the extrusion sheet 10 facing the rubber ring 8 and is arc-shaped. It is used to increase the contact area between the extrusion sheet 10 and the inner wall of the rubber ring 8, and to evenly distribute the extrusion pressure on the rubber ring 8, so as to avoid excessive local pressure that could cause the rubber ring 8 to break and extend the service life of the rubber ring 8.

[0033] like Figure 6 and Figure 9 As shown, in this embodiment, multiple protrusions 18 are fixed to the inner wall of the rubber ring 8. These protrusions 18 are staggered with the multiple extrusion plates 10. The side of the protrusion 18 furthest from the rubber ring 8 is arc-shaped. A cavity is formed inside the protrusion 18, filled with high-pressure gas. A U-shaped frame 19 is fixed to the inner wall of the cavity, with its opening facing away from the rubber ring 8. An extrusion band 20 is fixed between adjacent extrusion plates 10, fitting against the arc-shaped side of the protrusion 18. The protrusions 18 are fixed to the inner wall of the rubber ring 8, staggered with the extrusion plates 10, to fill the gaps between adjacent extrusion plates 10 and to act as a guide, preventing the extrusion plates 10 from rotating. The protrusion 18 is curved on the side away from the rubber ring 8, which is used to fit the extrusion strip 20 so that the extrusion pressure of the extrusion strip 20 can be evenly transmitted to the protrusion 18; the cavity has an opening inside the protrusion 18, which is filled with high-pressure gas to assist the expansion of the protrusion 18 and further improve the sealing between the rubber ring 8 and the protrusion 22; the U-shaped skeleton 19 is fixed to the inner wall of the cavity, with the opening facing the side away from the rubber ring 8, to prevent the protrusion 18 from expanding towards the extrusion piece 10, so as to avoid affecting the rotation of the extrusion piece 10, while transmitting the extrusion pressure; the extrusion strip 20 is fixed between adjacent extrusion pieces 10 and fits on the curved side of the protrusion 18 to transmit the extrusion pressure of the extrusion piece 10 to the protrusion 18.

[0034] like Figure 6 and Figure 7 As shown, in this embodiment, multiple convex rings 16 are fixedly sleeved on the surface of the rubber ring 8. A cavity 2 is formed inside the convex ring 16, and a nylon layer 17 is fixed to the inner wall of the cavity 2. The convex rings 16 are fixedly sleeved on the surface of the rubber ring 8 to form multiple sealing protection lines, further improving the sealing performance between the rubber ring 8 and the protrusion 22. The cavity 2 is formed inside the convex ring 16 to reduce stress concentration when the convex ring 16 is twisted, and to avoid damage to the convex ring 16. The nylon layer 17 is fixed to the inner wall of the cavity 2 to reduce the coefficient of friction when the convex ring 16 is twisted, reduce the wear of the convex ring 16, and extend the service life of the convex ring 16.

[0035] A method for grouting cracks at the rear edge of a landslide, applied to a landslide crack grouting machine as described above, includes the following steps: S1: Pre-embedded pipe 21 is embedded in the crack; S2: The grouting pipe 2 is inserted into the pre-embedded pipe 21, and the gap between the grouting pipe 2 and the pre-embedded pipe 21 is sealed by the sealing component 3; S3: Start the grouting machine body 1 to perform grouting; S4: After grouting is completed, loosen the sealing component 3 and pull out the grouting pipe 2.

[0036] Working principle: According to the construction requirements, the pre-embedded pipe 21 is pre-embedded in the crack at the rear edge of the landslide to ensure that the pre-embedded pipe 21 is firmly fixed. The grouting pipe 2 is aligned with the opening of the pre-embedded pipe 21 and slowly inserted into the pre-embedded pipe 21. During the insertion process, the position of the grouting pipe 2 is adjusted so that the locking block 24 on the surface of the sleeve 5 is aligned with the locking groove 23 on the top of the pre-embedded pipe 21 and the locking block 24 is engaged in the locking groove 23. At this time, the rubber ring 8 corresponds exactly to the protrusion 22 on the inner wall of the pre-embedded pipe 21. Hold the long handle on the surface of the internal threaded ring 4 and rotate the internal threaded ring 4. Since the internal threaded ring 4 is threadedly connected to the grouting pipe 2 and the grouting pipe 2 is restricted from rotating by the slot 23 and the block 24, when the internal threaded ring 4 rotates, the grouting pipe 2 moves upward. The grouting pipe 2 will drive the support ring 6 to move upward, and the support ring 6 will drive the moving ring 7 to move upward, so that multiple moving rings 7 move closer to each other. At this time, the rubber ring 8 will expand outward and fit against the inner wall of the protrusion 22. As the moving rings 7 approach each other, the squeezing ring 9 squeezes the squeezing piece 10, causing the squeezing piece 10 to rotate around the connecting belt 11 toward the rubber ring 8. The spring piece 13 deforms, and the arc-shaped squeezing part 12 at the top of the squeezing piece 10 squeezes the inner wall of the rubber ring 8, simultaneously driving the rubber ring 8 to expand outward and fit against the inner wall of the arc-shaped protrusion 22 of the pre-embedded pipe 21. During the opening process of the extrusion sheet 10, the extrusion belt 20 is driven to extrude the protrusion strip 18. The high-pressure gas in the protrusion strip 18, together with the U-shaped skeleton 19, transmits the extrusion force to the rubber ring 8, filling the gap between adjacent extrusion sheets 10 and further improving the sealing performance. After the convex ring 16 on the surface of the rubber ring 8 is squeezed, multiple protective lines are formed. The cavity 2 is used to reduce stress concentration and wear, and ensure sealing stability. At this time, the outer diameter of the extrusion plate 10 after expansion is larger than the inner diameter of the grouting pipe 2, and it is stuck in the protrusion 22 to prevent the grouting pipe 2 from detaching from the pre-embedded pipe 21, thus ensuring safe use. After the sealing is completed, the grouting machine body 1 is started. The grouting machine body 1 delivers the grouting material to the grouting pipe 2 through the pipeline. The grouting material is injected into the pre-embedded pipe 21 through the grouting pipe 2, and then penetrates into the crack at the rear edge of the landslide through the pre-embedded pipe 21 to complete the crack grouting and filling. After grouting is completed, shut down the grouting machine body 1 to stop grouting, rotate the internal threaded ring 4 in the opposite direction to move the grouting pipe 2 downward, release the compression on the sleeve 5, the spring plate 13 elastically resets, and drives the extrusion plate 10 back to its initial position. After the rubber ring 8 loses the extrusion force, it contracts, and the protrusion strip 18 and protrusion ring 16 also reset synchronously, releasing the rubber ring 8 from the adhesion state of the protrusion 22. At this time, the locking block 24 can be easily disengaged from the locking groove 23. Pull the grouting pipe 2 out of the pre-embedded pipe 21, clean the grouting material remaining on the grouting pipe 2 and the sealing component 3, and ensure that the rubber ring 8, extrusion plate 10, convex strip 18 and other components are free of residue and damage, in preparation for the grouting operation of the next crack.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A grouting machine for cracks at the rear edge of a landslide, comprising a grouting machine body (1) and a pre-embedded pipe (21), wherein the pre-embedded pipe (21) is pre-embedded in the crack, and a grouting pipe (2) is connected to the grout outlet of the grouting machine body (1) via a pipeline. In use, the grouting pipe (2) is inserted into the pre-embedded pipe (21). The machine is characterized in that... Also includes: The sealing assembly (3) includes a support ring (6) fixedly sleeved on the surface of the grouting pipe (2), and multiple movable rings (7) movably sleeved on the surface of the grouting pipe (2). The bottom of the lowermost movable ring (7) is attached to the top of the support ring (6). A rubber ring (8) is fixed between adjacent movable rings (7). A driving assembly is provided on the top of the uppermost movable ring (7). Multiple arc-shaped protrusions (22) are integrally formed on the surface of the pre-embedded pipe (21). When in use, the drive assembly drives the rubber ring (8) to expand and fit against the inner wall of the protrusion (22).

2. The landslide back-edge crack grouting machine according to claim 1, characterized in that, The drive assembly includes an internal threaded ring (4) threaded onto the surface of the grouting pipe (2), a long handle is symmetrically fixed on the surface of the internal threaded ring (4), a sleeve (5) is movably fitted onto the surface of the grouting pipe (2), the bottom of the internal threaded ring (4) is attached to the top of the sleeve (5), and the bottom of the sleeve (5) is attached to the top of the uppermost movable ring (7).

3. The landslide back-edge crack grouting machine according to claim 2, characterized in that, The top of the pre-embedded pipe (21) is provided with a slot (23), and the surface of the sleeve (5) is fixed with a block (24). When in use, the block (24) is engaged in the slot (23).

4. The landslide back-edge crack grouting machine according to claim 1, characterized in that, The bottom of the support ring (6) is movably connected through the limiting block (14), the top of the limiting block (14) is fixed to the bottom of the lowest moving ring (7), and the bottom of the limiting block (14) is fixed with a limiting plate (15), which is attached to the bottom of the support ring (6).

5. The landslide back-edge crack grouting machine according to claim 1, characterized in that, The rubber ring (8) is provided with an expansion component inside, which is used to assist the rubber ring (8) in fitting against the inner wall of the protrusion (22).

6. The landslide back-edge crack grouting machine according to claim 5, characterized in that, The expansion assembly includes multiple extrusion rings (9) and multiple extrusion plates (10). The multiple extrusion rings (9) and multiple extrusion plates (10) are evenly distributed between multiple adjacent moving rings (7). The top of the extrusion ring (9) is fixed to the bottom of the upper moving ring (7). The bottom of the extrusion plate (10) is fixed with a connecting strip (11). The bottom of the connecting strip (11) is fixed to the top of the lower moving ring (7). The side of the extrusion plate (10) facing the rubber ring (8) is fixed with a spring piece (13). The spring piece (13) is fixed to the top of the lower moving ring (7). When the moving rings (7) approach each other, the extrusion ring (9) extrudes the extrusion plate (10) to expand outward.

7. The landslide back-edge crack grouting machine according to claim 6, characterized in that, The extrusion sheet (10) has an integrally formed extrusion part (12) on the side facing the rubber ring (8) and at the top. The extrusion part (12) is arc-shaped and fits against the inner wall of the rubber ring (8).

8. The landslide back-edge crack grouting machine according to claim 6, characterized in that, The inner wall of the rubber ring (8) is fixed with multiple protrusions (18), and the multiple protrusions (18) and multiple extrusion plates (10) are staggered. The side of the protrusion (18) away from the rubber ring (8) is arc-shaped. A cavity is opened inside the protrusion (18), and high-pressure gas is filled in the cavity. A U-shaped skeleton (19) is fixed on the inner wall of the cavity. The opening of the U-shaped skeleton (19) faces the side away from the rubber ring (8). An extrusion strip (20) is fixed between adjacent extrusion plates (10), and the extrusion strip (20) is attached to the arc-shaped side of the protrusion (18).

9. The landslide back-edge crack grouting machine according to claim 6, characterized in that, The surface of the rubber ring (8) is fixedly fitted with a plurality of protruding rings (16), and a cavity II is provided inside the protruding rings (16), and a nylon layer (17) is fixed to the inner wall of the cavity II.

10. The landslide rear edge crack grouting method according to claim 1, using the landslide rear edge crack grouting machine according to any one of claims 1-9, characterized in that, Includes the following steps: S1: The pre-embedded pipe (21) is pre-embedded in the crack; S2: The grouting pipe (2) is inserted into the pre-embedded pipe (21), and the gap between the grouting pipe (2) and the pre-embedded pipe (21) is sealed by the sealing component (3); S3: Start the grouting machine body (1) to perform grouting; S4: After grouting is completed, loosen the sealing component (3) and pull out the grouting pipe (2).

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