Grouting device

Abstract

The application relates to the technical field of tunnel construction, and provides a grouting device. The grouting device comprises an outer guide pipe, a grouting pipe and a grout-stopping sleeve. Two sealing rings are arranged in the outer guide pipe along the axial direction of the outer guide pipe. The outer guide pipe is provided with a guide pipe hole in the region between the two sealing rings. One end of the outer guide pipe is closed, and the other end is formed with an opening along the axial direction of the outer guide pipe. One end of the grouting pipe is closed and can be inserted into the inner part of the outer guide pipe through the opening. The grouting pipe is arranged in the two sealing rings, and the sealing rings are sealingly connected with the inner wall of the outer guide pipe and the outer wall of the grouting pipe. The grouting pipe is provided with an injection hole in the region between the two sealing rings. The grout-stopping sleeve is sleeved on the outer wall of one end of the outer guide pipe close to the opening, and is used for sealing the gap between the outer guide pipe and the grouting hole. The multiple sealing rings and the grout-stopping sleeve cooperate with each other to form a plugging structure in the two paths of grout overflow, so that the grout overflow from the opening of the outer guide pipe and the orifice of the grouting hole is blocked, and repeated shutdown in the grouting process is avoided.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, and in particular to a grouting device. Background Technology

[0002] Grouting is a crucial step in tunnel construction. Through grouting, grout penetrates under pressure into the pores and fissures of the soil and rock mass. After solidification, it binds loose soil and rock particles, increasing the cohesion, internal friction angle, and overall bearing capacity of the soil and rock. Simultaneously, it improves the structural properties of the soil to reduce settlement and deformation, providing a stable environment for construction. Current technology typically employs a pre-insertion guide pipe in conjunction with a grouting pipe for grouting operations: after drilling grouting holes in the tunnel soil, a pre-insertion guide pipe with one closed end is inserted. The sidewall of this guide pipe has through-holes, with the open end connected to the grouting pipe. During grouting, the grout enters the guide pipe cavity through the grouting pipe and then permeates into the soil through the through-holes in the sidewall of the pre-insertion guide pipe.

[0003] However, the limited size of the guide pipe's through-hole and the narrow gap between it and the inner wall of the grouting hole, coupled with soil seepage resistance, result in excessively high grouting pressure. The high-pressure grout easily seeps back through the gap between the outer wall of the guide pipe and the hole wall, and also overflows from the opening of the guide pipe at the junction with the grouting pipe. These leakage phenomena force repeated shutdowns during construction, severely limiting grouting efficiency. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a grouting device.

[0005] This application provides a grouting device, comprising:

[0006] An outer conduit has multiple sealing rings arranged at intervals along the axial direction of the outer conduit. A grouting area is formed between each pair of adjacent sealing rings. A conduit hole is provided on the pipe wall corresponding to the grouting area of ​​the outer conduit. Along the axial direction of the outer conduit, one end of the outer conduit is closed and the other end is open.

[0007] The grouting pipe is closed at one end and can be inserted into the interior of the outer conduit through the opening. The grouting pipe passes through multiple sealing rings, and the sealing rings are sealed to the inner wall of the outer conduit and the outer wall of the grouting pipe. The grouting pipe has injection holes on the pipe wall corresponding to the grouting area.

[0008] A grout-stopping sleeve is fitted onto the outer wall of the end of the outer conduit near the opening, and is used to seal the gap between the outer conduit and the grouting hole.

[0009] Optionally, the sealing ring includes an elastic ring body, the sealing ring abuts against the inner wall of the outer conduit and the outer wall of the grouting pipe, and the opposite side of two adjacent sealing rings along the axial direction of the outer conduit is a pressure-bearing surface;

[0010] When the grout between the outer conduit and the grouting pipe applies pressure to the pressure-bearing surface, the elastic ring can expand and deform radially in the outer conduit.

[0011] Optionally, the grout stop sleeve includes a cylindrical part and an elastic abutment part, wherein the cylindrical part is sleeved on the outside of the outer conduit and is sealed to the outer conduit;

[0012] The elastic abutment portion protrudes from the side of the cylindrical portion facing away from the outer conduit, and the elastic abutment portion extends circumferentially around the cylindrical portion.

[0013] Optionally, the number of elastic abutment portions is multiple, and the multiple elastic abutment portions are spaced apart along the axial direction of the cylindrical portion.

[0014] Optionally, the outer wall of the external conduit is provided with a reinforcing structure, which is a mesh structure with multiple grids. The number of conduit holes is multiple, and the multiple conduit holes are exposed in the multiple grids in a one-to-one correspondence.

[0015] Optionally, the reinforcing structure includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, wherein the first reinforcing ribs extend axially along the outer conduit and the second reinforcing ribs extend circumferentially along the outer conduit.

[0016] Multiple first reinforcing ribs are spaced apart circumferentially along the outer conduit, and multiple second reinforcing ribs are spaced apart axially along the outer conduit. The multiple first reinforcing ribs and multiple second reinforcing ribs intersect to form multiple grids.

[0017] Optionally, the reinforcing structure is disposed on the pipe wall corresponding to the outer conduit and the grouting area.

[0018] Optionally, one closed end of the external conduit is formed with a tapered structure, and the diameter of the tapered structure gradually decreases in the direction away from the opening along the axial direction of the external conduit.

[0019] Optionally, each grouting zone corresponds to a plurality of injection holes, and the plurality of injection holes are arranged at least circumferentially along the grouting pipe, with each injection hole extending axially along the outer conduit.

[0020] Optionally, the external conduit is a plastic tube.

[0021] The technical solution provided in this application has the following advantages compared with the prior art:

[0022] The grouting device provided in this application has a grouting pipe inserted inside an outer guide pipe. Multiple sealing rings are used to seal the connection between the grouting pipe and the outer guide pipe. Grout flows to the outside of the outer guide pipe through the injection hole and guide pipe hole corresponding to the grouting zone. During grouting, the multiple sealing rings restrict the flow of grout between the grouting pipe and the outer guide pipe within the grouting zone, limiting the grout's flow range along the axial direction of the outer guide pipe and preventing grout from overflowing from the opening of the outer guide pipe. A grout-stopping sleeve seals the gap between the grouting hole and the outer guide pipe, restricting the grout's flow range along the axial direction of the outer guide pipe and preventing grout from overflowing from the opening of the grouting hole. The multiple sealing rings and the grout-stopping sleeve work together to form a sealing structure along the two paths of grout overflow, thereby preventing grout from overflowing from the opening of the outer guide pipe and the opening of the grouting hole in the soil. This avoids repeated shutdowns during the grouting process, allowing workers to perform grouting operations continuously for extended periods and improving grouting efficiency. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the assembly structure of the external conduit and the grout stop sleeve described in the embodiments of this application;

[0026] Figure 2 This is a cross-sectional view of the grouting device described in the embodiments of this application;

[0027] Figure 3 This is a cross-sectional schematic diagram of the grouting device described in the embodiments of this application during use.

[0028] Among them, 1. outer guide pipe; 11. sealing ring; 12. guide pipe hole; 13. reinforcement structure; 131. first reinforcement bar; 132. second reinforcement bar; 2. grouting pipe; 21. injection hole; 3. grout stop sleeve; 31. cylinder part; 32. elastic abutment part; 4. soil. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0031] Reference Figures 1 to 3 As shown, this application embodiment provides a grouting device, including an outer conduit 1, a grouting pipe 2, and a grout-stopping sleeve 3; the outer conduit 1 has a plurality of sealing rings 11 arranged at intervals along the axial direction of the outer conduit 1, and a grouting area is formed between each two adjacent sealing rings 11. The outer conduit 1 has a conduit hole 12 on the pipe wall corresponding to the grouting area. Along the axial direction of the outer conduit 1, one end of the outer conduit 1 is closed and the other end is open; the grouting pipe 2 has one end closed and can be inserted into the interior of the outer conduit 1 through the opening. The grouting pipe 2 passes through the plurality of sealing rings 11, and the sealing rings 11 are sealed to the inner wall of the outer conduit 1 and the outer wall of the grouting pipe 2. The grouting pipe 2 has an injection hole 21 on the pipe wall corresponding to the grouting area; the grout-stopping sleeve 3 is sleeved on the outer wall of the outer conduit 1 near the opening and is used to seal the gap between the outer conduit 1 and the grouting hole.

[0032] Specifically, the outer conduit 1 can be a plastic tube or a metal tube. The interior space of the outer conduit 1 is the working space. One end of the outer conduit 1 is closed and serves as a closed end, while the other end has an opening that communicates with the working space.

[0033] The outer conduit 1 can be provided with multiple annular rubber rings or soft rubber rings as sealing rings 11 at intervals. The space between two sealing rings 11 is the grouting area. The outer conduit 1 has through holes in the pipe wall between the two sealing rings 11 as conduit holes 12. A grouting area is formed inside the outer conduit 1. The outer conduit 1 can be provided with one conduit hole 12 or multiple conduit holes 12. The multiple conduit holes 12 are provided at intervals along the circumference of the outer conduit 1.

[0034] Alternatively, more than two rubber rings or soft rubber rings can be set inside the outer conduit 1 as sealing rings 11; in the axial direction of the outer conduit 1, the space between each two adjacent sealing rings 11 is used as a grouting zone, and the outer conduit 1 is provided with conduit holes 12 at the positions corresponding to the multiple grouting zones; it is possible to choose to provide one conduit hole 12 on the pipe wall corresponding to each grouting zone of the outer conduit 1, or to choose to provide multiple conduit holes 12 on the pipe wall corresponding to each grouting zone of the outer conduit 1, and the multiple conduit holes 12 are spaced apart along the circumference of the outer conduit 1.

[0035] One end of the grouting pipe 2 can be sealed with a sealing plug or a welded plug. The sealed end of the grouting pipe 2 can be inserted into the interior of the outer conduit 1 through the opening. The grouting pipe 2 is inserted into multiple sealing rings 11. The outer ring surface of the sealing ring 11 along its own axis is in close contact with the inner wall of the outer conduit 1, and the inner ring surface of the sealing ring 11 along its own axis is in close contact with the grouting pipe 2, thereby sealing the space between the grouting pipe 2 and the outer conduit 1.

[0036] The grouting pipe 2 has through holes on its wall corresponding to the grouting area, which serve as injection holes 21. The injection holes 21 are connected to the interior of the grouting pipe 2. When a grouting area is formed inside the outer conduit 1, the grouting pipe 2 can be provided with one injection hole 21 or multiple injection holes 21 spaced apart along the circumference of the grouting pipe 2. When multiple grouting areas are formed inside the outer conduit 1, the grouting pipe 2 is provided with injection holes 21 on the wall corresponding to each grouting area. It is possible to provide one injection hole 21 at the position corresponding to each grouting area of ​​the grouting pipe 2. Alternatively, it is possible to provide multiple injection holes 21 at the position corresponding to each grouting area of ​​the grouting pipe 2. The multiple injection holes 21 can be spaced apart along the circumference of the grouting pipe 2, or multiple injection holes 21 spaced apart along the circumference of the grouting pipe 2 can be arranged as a group of injection holes. Multiple groups of injection holes are arranged along the axial direction of the grouting pipe 2.

[0037] After the grouting pipe 2 is inserted into the outer guide pipe 1, the pipe walls of the grouting pipe 2 and the outer guide pipe 1, along with the two sealing rings 11 of the grouting area, can form a grouting cavity. The guide pipe hole 12 communicates with the grouting cavity, and the injection hole 21 also communicates with the grouting cavity. The grout in the grouting pipe 2 enters the grouting cavity through the injection hole 21. The grout in the grouting cavity flows to the outside of the outer guide pipe 1 through the guide pipe hole 12, allowing the grout to penetrate into the soil. The two sealing rings 11 restrict the flow range of the grout between the outer guide pipe 1 and the grouting pipe 2, preventing the grout from flowing out from the gap between the opening of the outer guide pipe 1 and the grouting pipe 2.

[0038] The aforementioned grout-stopping sleeve 3 can be a cylindrical structure made of rubber or soft rubber. The grout-stopping sleeve 3 is fitted on the outside of the outer guide tube 1 and is located at the end of the outer guide tube 1 near the opening. When the grout flows out from the guide tube hole 12 into the grouting hole, the grout-stopping sleeve 3 can seal the gap between the outer guide tube 1 and the hole wall of the grouting hole, preventing the grout from flowing back out of the hole opening.

[0039] If a sealing structure is only installed between the outer guide pipe 1 and the grouting pipe 2, although the high-pressure grout will not overflow from the opening of the outer guide pipe 1, the pressure of the grout between the outer guide pipe 1 and the grouting pipe 2 will increase compared to the case without a sealing structure, causing more grout to flow out to the outside of the outer guide pipe 1. With the soil permeability resistance remaining constant, the amount of grout that can permeate into the soil per unit time remains stable. The increased pressure of the grout outside the outer guide pipe 1 will cause more grout to flow out from the grouting hole. Installing a sealing structure only between the outer guide pipe 1 and the grouting hole will increase the amount and pressure of grout outside the outer guide pipe 1, increasing the pressure of the grout flowing out of the outer guide pipe 1 through the guide pipe hole 12, and increasing the amount of grout overflowing from the opening of the outer guide pipe 1.

[0040] In traditional grouting operations, a pre-guided pipe with one end closed is inserted into the grouting hole in soil mass 4. The pre-guided pipe has through holes in its sidewalls, and its open end connects to the grouting pipe. During grouting, the grout enters the guide pipe cavity through the grouting pipe and permeates into the soil through the through holes in the sidewalls of the pre-guided pipe. To improve the stability of the pre-guided pipe's position within the grouting hole and thus enhance the accuracy of the grouting operation, the diameters of the pre-guided pipe and the grouting hole need to be close, ensuring that the pre-guided pipe fits snugly against the hole wall.

[0041] However, the narrow gap between the pre-conduit pipe and the inner wall of the grouting hole, coupled with the soil's seepage resistance, results in excessively high grouting pressure. The high-pressure grout will flow axially along the pre-conduit pipe in the space between the pre-conduit pipe and the grouting pipe, causing the grout to overflow backwards from the opening of the pre-conduit pipe. Due to the large seepage resistance of the soil, the grout between the pre-conduit pipe and the inner wall of the grouting hole will also flow axially along the pre-conduit pipe, causing the grout to overflow backwards from the gap between the grouting hole opening and the pre-conduit pipe.

[0042] The grouting device provided in this application has a grouting pipe 2 inserted inside an outer conduit 1. Multiple sealing rings 11 are sealed between the grouting pipe 2 and the outer conduit 1. The grout flows to the outside of the outer conduit 1 through the injection hole 21 and the conduit hole 12 corresponding to the grouting area. During grouting, the multiple sealing rings 11 allow the grout between the grouting pipe 2 and the outer conduit 1 to flow within the grouting area, limiting the grout's flow range along the axial direction of the outer conduit 1 and preventing the grout from overflowing from the opening of the outer conduit 1. The grout stop sleeve 3 seals the gap between the grouting hole and the outer conduit 1, limiting the grout's flow range along the axial direction of the outer conduit 1 and preventing the grout from overflowing from the opening of the grouting hole. The multiple sealing rings 11 and the grout stop sleeve 3 cooperate to form a sealing structure on the two paths of grout overflow, thereby preventing the grout from overflowing from the opening of the outer conduit 1 and the opening of the grouting hole, avoiding repeated shutdowns during the grouting process, allowing workers to perform grouting operations continuously for a long time and improving grouting efficiency.

[0043] Reference Figures 1 to 3As shown, in some embodiments, the sealing ring 11 includes an elastic ring body, the sealing ring 11 abuts against the inner wall of the outer conduit 1 and the outer wall of the grouting pipe 2, and the opposite side of two adjacent sealing rings 11 along the axial direction of the outer conduit 1 is a pressure-bearing surface.

[0044] When the grout between the outer conduit 1 and the grouting pipe 2 applies pressure to the pressure-bearing surface, the elastic ring can expand and deform radially in the outer conduit 1.

[0045] With this configuration, the grout applies pressure axially towards the pressure-bearing surface of the outer conduit 1, causing the sealing ring 11 to expand and deform. This increases the force exerted by the sealing ring 11 axially towards the outer conduit 1 and towards the grouting pipe 2, enhancing the tightness of the contact between the sealing ring 11 and the outer conduit 1 and the grouting pipe 2, thereby improving the sealing performance between the sealing ring 11 and these components. Furthermore, the greater the grout pressure between the two sealing rings 11, the greater the contact force between the sealing ring 11 and the outer conduit 1 and the grouting pipe 2, resulting in a better sealing effect for the sealing ring 11. In other words, the sealing ring 11 improves the stability of the seal as the grout pressure increases, preventing leakage and ensuring reliable sealing under high-pressure conditions.

[0046] Specifically, the sealing ring 11 can be an elastic ring made of rubber or soft rubber; the cross-section of the sealing ring 11 parallel to its axial direction is circular or elliptical; the inner surface of the sealing ring 11 can be fitted to the outer wall of the grouting pipe 2, and the outer surface of the sealing ring 11 can be fitted to the inner wall of the outer conduit 1. The sealing ring 11 can be bonded to the grouting pipe 2, or bonded to the outer conduit 1, or bonded to both the grouting pipe 2 and the outer conduit 1, thus maintaining a stable position of the sealing ring 11 between the outer conduit 1 and the grouting pipe 2. Alternatively, the sealing ring 11 can be placed against the outer conduit 1 and the grouting pipe 2, using friction to maintain a stable relative position between them.

[0047] Two adjacent sealing rings 11 have opposite sides along the axial direction of the outer conduit 1 as pressure-bearing surfaces. These two pressure-bearing surfaces serve as the inner walls of the grouting cavity. When the grout flows along the axial direction of the outer conduit 1 in the grouting cavity, it applies pressure to the pressure-bearing surfaces. Since the sealing rings 11 are all elastic components and their positions remain stable in the outer conduit 1 and the grouting pipe 2, the pressure on the pressure-bearing surfaces along the axial direction of the outer conduit 1 will squeeze the sealing rings 11, causing them to expand and deform radially along the outer conduit 1. This causes the outer ring surface of the sealing rings 11 to move towards the outer conduit 1, and the inner ring surface to move towards the grouting pipe 2. The sealing rings 11 undergo radial expansion and deformation in a plane perpendicular to the axis of the outer conduit 1, resulting in their outer ring surface pressing more tightly against the inner wall of the outer conduit 1 and their inner ring surface pressing more tightly against the outer wall of the grouting pipe 2, thus ensuring that the sealing rings 11 are tightly fitted with the outer conduit 1 and the grouting pipe 2.

[0048] Reference Figures 1 to 3 As shown, in some embodiments, the grout stop sleeve 3 includes a cylindrical part 31 and an elastic abutment part 32. The cylindrical part 31 is sleeved on the outside of the outer conduit 1 and is sealed to the outer conduit 1. The elastic abutment part 32 protrudes from the side of the cylindrical part 31 facing away from the outer conduit 1 and extends circumferentially along the cylindrical part 31 to surround the cylindrical part 31.

[0049] With this configuration, the annular elastic abutment part 32 can tightly abut against the wall of the grouting hole, ensuring the sealing effect of the grout-stopping sleeve 3 on the gap between the outer guide tube 1 and the wall of the grouting hole.

[0050] Specifically, the cylindrical part 31 can be a hollow cylindrical structure. The diameter of the cylindrical part 31 can be slightly smaller than the outer diameter of the outer conduit 1. The cylindrical part 31 is elastic, so that after the cylindrical part 31 is fitted onto the outer conduit 1, the cylindrical part 31 and the outer wall of the outer conduit 1 are tightly abutted to achieve a sealed connection between the cylindrical part 31 and the outer conduit 1. Alternatively, after the cylindrical part 31 is fitted onto the outer conduit 1, sealant can be filled between the cylindrical part 31 and the outer conduit 1 to achieve a sealed connection between the cylindrical part 31 and the outer conduit 1.

[0051] The elastic abutment 32 can be an annular protrusion. The diameter of the cylindrical portion 31 can be equal to the diameter of the grouting hole in the soil 4, or the diameter of the cylindrical portion 31 can be slightly smaller than the diameter of the grouting hole in the soil 4, as long as the cylindrical portion 31 can be inserted into the grouting hole and the elastic abutment 32 can tightly abut against the inner wall of the grouting hole. When the elastic abutment 32 abuts against the wall of the grouting hole, it will generate elastic deformation towards the cylindrical portion 31, allowing the elastic force of the elastic abutment 32 itself to drive the elastic abutment 32 to apply force towards the wall of the grouting hole.

[0052] The aforementioned cylindrical part 31 and elastic abutment part 32 can both have elastic elements and be integrally formed. Alternatively, the elastic abutment part 32 and the cylindrical part 31 can be connected by bonding or ultrasonic welding.

[0053] Reference Figures 1 to 3 As shown, in some embodiments, there are multiple elastic abutment portions 32, and the multiple elastic abutment portions 32 are spaced apart along the axial direction of the cylindrical portion 31.

[0054] With this configuration, multiple elastic contact parts 32 can form a multi-layer sealing structure between the outer guide tube 1 and the hole wall of the grouting hole, improving the sealing performance of the sealing connection between the grout stop sleeve 3 and the grouting hole, and preventing grout from overflowing through the space between the grout stop sleeve 3 and the grouting hole.

[0055] Specifically, three elastic abutment parts 32 can be provided on the cylinder part 31, or other numbers of elastic abutment parts 32 can be provided; multiple elastic abutment parts 32 can be of equal diameter, or the diameter of multiple elastic abutment parts 32 can be increased along the direction from the closed end of the outer guide tube 1 toward the opening, so that elastic abutment parts 32 of different diameters can be adapted to grouting holes of different sizes.

[0056] Reference Figures 1 to 3 As shown, in some embodiments, the outer wall of the external conduit 1 is provided with a reinforcing structure 13. The reinforcing structure 13 is a mesh structure with multiple grids. There are multiple conduit holes 12, and the multiple conduit holes 12 are exposed in the multiple grids in a one-to-one correspondence.

[0057] With this configuration, the reinforcement structure 13 can improve the overall strength of the outer guide tube 1, making it less prone to deformation during insertion into the grouting hole. Furthermore, the reinforcement structure 13 increases the roughness on the outer surface of the outer guide tube 1, enhancing the frictional force of the outer guide tube 1 as it moves within the grouting hole, thus preventing the outer guide tube 1 from sliding after being installed in the grouting hole.

[0058] Specifically, the reinforcing structure 13 can be selected as a rib provided on the outer wall of the outer conduit 1. The rib has longitudinal ribs extending along the axial direction of the outer conduit 1 and transverse ribs extending along the circumference of the outer conduit 1. The longitudinal ribs and transverse ribs are interlaced to form a grid structure. Alternatively, the reinforcing structure 13 can include longitudinal plates and transverse plates that are perpendicular to each other. Both the longitudinal plates and transverse plates are inclined relative to the axial direction of the outer conduit 1.

[0059] The aforementioned conduit hole 12 is exposed within the grid to prevent the grid from obstructing the flow of slurry from the outer conduit 1. The mesh structure of the reinforcing structure 13 has multiple grids, each grid containing a conduit hole 12. The multiple grids are evenly distributed on the outer wall of the outer conduit 1, and the multiple conduit holes 12 are also evenly distributed on the outer wall of the outer conduit 1.

[0060] Multiple guide holes 12 can be selected to correspond to one grouting area, or multiple guide holes 12 can be selected to correspond to multiple grouting areas. The area on the outer wall of the outer guide 1 with the reinforcement structure 13 can be selected to correspond to the grouting area, or the area on the outer wall of the outer guide 1 with the reinforcement structure 13 can be selected to cover the grouting area.

[0061] Reference Figures 1 to 3 As shown, in some embodiments, the reinforcing structure 13 includes a plurality of first reinforcing ribs 131 and a plurality of second reinforcing ribs 132. The first reinforcing ribs 131 extend axially along the outer conduit 1, and the second reinforcing ribs 132 extend circumferentially along the outer conduit 1. The plurality of first reinforcing ribs 131 are spaced apart circumferentially along the outer conduit 1, and the plurality of second reinforcing ribs 132 are spaced apart axially along the outer conduit 1. The plurality of first reinforcing ribs 131 and the plurality of second reinforcing ribs 132 intersect to form a plurality of grids.

[0062] With this configuration, the first reinforcing rib 131 can enhance the axial structural strength of the outer conduit 1, and the second reinforcing rib 132 can enhance the circumferential structural strength of the outer conduit 1. The orthogonal arrangement of the first reinforcing rib 131 and the second reinforcing rib 132 can enhance the overall structural strength of the outer conduit 1 and improve its structural stability.

[0063] Specifically, the first reinforcing rib 131 and the second reinforcing rib 132 can both be protrusions formed on the outer wall of the outer conduit 1, and the first reinforcing rib 131 and the second reinforcing rib 132 are perpendicular to each other and can form an orthogonal mesh structure.

[0064] The first reinforcing rib 131 extends axially along the outer conduit 1 to form a straight plate structure, and the second reinforcing rib 132 extends circumferentially along the outer conduit 1 to form a ring structure. Multiple ring structures and multiple straight plate structures intersect to form a mesh structure. The intersection nodes of the first reinforcing rib 131 and the second reinforcing rib 132 can be connected to each other by welding. Alternatively, the first reinforcing rib 131 can have the same number of notches as the multiple second reinforcing ribs 132, so that the second reinforcing ribs 132 are located within the corresponding notches of the first reinforcing rib 131; or the first reinforcing rib 131 and the second reinforcing rib 132 can be an integral structure.

[0065] Reference Figures 1 to 3 As shown, in some embodiments, the reinforcing structure 13 is disposed on the pipe wall corresponding to the grouting area of ​​the outer conduit 1.

[0066] With this configuration, the reinforcing structure 13 can reinforce the portion of the outer conduit 1 with the conduit hole 12, and can prevent the reinforcing structure 13 from affecting the sealing connection between the grout stop sleeve 3 and the outer conduit 1.

[0067] Specifically, when the outer conduit 1 has two sealing rings 11, the reinforcing structure 13 can be positioned between the two sealing rings 11 at both ends along the axial direction of the outer conduit 1, so that the reinforcing structure 13 reinforces the portion of the outer conduit 1 with the conduit hole 12. Alternatively, when the outer conduit 1 has multiple sealing rings 11, the two ends of the reinforcing structure 13 can be positioned at the sealing rings 11 at both ends along the axial direction of the outer conduit 1.

[0068] Reference Figures 1 to 3 As shown, in some embodiments, the closed end of the outer conduit 1 is formed with a tapered structure, and the diameter of the tapered structure gradually decreases away from the opening along the axial direction of the outer conduit 1. This configuration reduces the resistance to insertion into the grouting hole, facilitating the placement of the outer conduit 1 at a designated position within the grouting hole.

[0069] Specifically, the conical structure can be welded to the closed end of the outer conduit 1, or the closed end of the outer conduit 1 can be machined into a conical structure. There may be residual soil clods in the grouting hole; the tip of the conical structure can push away the soil clods and insert the outer conduit 1 into the grouting hole. The cross-sectional diameter of the conical structure gradually decreases in the direction away from the opening.

[0070] Reference Figures 1 to 3 As shown, in some embodiments, there are multiple injection holes 21 corresponding to each grouting zone, and the multiple injection holes 21 are arranged at least circumferentially along the grouting pipe 2, and each injection hole 21 extends axially along the outer guide tube 1.

[0071] With this configuration, the slurry can flow rapidly into the outer conduit 1 through multiple injection holes 21, and the injection holes 21 extend along the axial direction of the outer conduit 1 to increase the flow rate of the injection holes 21.

[0072] Specifically, injection holes 21 are spaced apart circumferentially along the grouting pipe 2, allowing the liquid inside the grouting pipe 2 to flow between the grouting pipe 2 and the outer conduit 1 through multiple injection holes 21. Multiple injection holes 21 arranged circumferentially along the grouting pipe 2 form an injection hole group. Alternatively, multiple injection hole groups can be provided on the grouting pipe 2, spaced apart axially along the grouting pipe 2. The injection holes 21 extend axially along the outer conduit 1 to form elongated holes.

[0073] Reference Figures 1 to 3 As shown, in some embodiments, the outer conduit 1 is a plastic tube. This design allows the plastic tube to combine the advantages of being lightweight and corrosion-resistant, reducing construction costs.

[0074] Specifically, the external catheter 1 can be made of PVC or other plastic materials; plastic is lightweight and corrosion-resistant, and the cost of making the external catheter 1 with plastic is low.

[0075] In practical use, the grouting device provided in this application embodiment first drills a deep hole at the location where grouting is required, with the hole diameter being similar to that of the outer guide tube 1. During construction, the outer guide tube 1 is pressed into the grouting hole. A grout-stopping sleeve 3 is installed near the end of the outer guide tube 1. When the outer guide tube 1 is pressed into the grouting hole, the grout-stopping sleeve 3 is also pressed into the grouting hole, so that the elastic abutment part 32 of the grout-stopping sleeve 3 is sealed and connected to the hole wall of the grouting hole. The reinforcing structure 13 fits and abuts against the hole wall of the grouting hole, so that the position of the outer guide tube 1 remains stable.

[0076] The grouting pipe 2 extends into the outer conduit 1 through the opening, passing through multiple sealing rings 11. During grouting, grout is injected into the grouting space through the injection hole 21 on the grouting pipe 2. The grout in the grouting space compresses the pressure-bearing surface of the sealing rings 11, causing the sealing rings 11 to expand and gain a certain strength, thus preventing the grout from flowing back and overflowing from the opening of the outer conduit 1. The grout in the grouting space flows out of the outer conduit 1 through the conduit hole 12, allowing the grout to penetrate into the wall of the grouting hole.

[0077] After completing the grouting work in the corresponding grouting area, the pressure inside the pipe can be reduced to remove the grouting device, or grouting can be carried out in other areas. In actual operation, construction personnel can achieve precise grouting by controlling the pressure and flow rate of the grouting pump and moving the position of the grouting pipe according to the grouting requirements.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grouting device, characterized in that, include: An outer conduit (1) is provided with a plurality of sealing rings (11) arranged at intervals along the axial direction of the outer conduit (1). A grouting area is formed between each pair of adjacent sealing rings (11). A conduit hole (12) is provided on the wall of the outer conduit (1) corresponding to the grouting area. Along the axial direction of the outer conduit (1), one end of the outer conduit (1) is closed and the other end is open. The grouting pipe (2) is closed at one end and can be inserted into the outer conduit (1) through the opening. The grouting pipe (2) passes through a plurality of sealing rings (11), and the sealing rings (11) are sealed to the inner wall of the outer conduit (1) and the outer wall of the grouting pipe (2). The grouting pipe (2) has an injection hole (21) on the pipe wall corresponding to the grouting area. A grout stop sleeve (3) is fitted onto the outer wall of the end of the outer conduit (1) near the opening, and is used to seal the gap between the outer conduit (1) and the grouting hole.

2. A grouting device according to claim 1, characterized in that The sealing ring (11) includes an elastic ring body. The sealing ring (11) abuts against the inner wall of the outer conduit (1) and the outer wall of the grouting pipe (2). The two adjacent sealing rings (11) are pressure-bearing surfaces on opposite sides along the axial direction of the outer conduit (1). When the grout between the outer conduit (1) and the grouting pipe (2) applies pressure to the pressure-bearing surface, the elastic ring can expand and deform radially in the outer conduit (1).

3. The grouting device according to claim 1, characterized in that The grout stop sleeve (3) includes a cylindrical part (31) and an elastic abutment part (32). The cylindrical part (31) is sleeved on the outside of the outer conduit (1) and is sealed to the outer conduit (1). The elastic abutment portion (32) protrudes from the side of the cylindrical portion (31) facing away from the outer guide tube (1), and the elastic abutment portion (32) extends circumferentially along the cylindrical portion (31) to surround the cylindrical portion (31).

4. A grouting device according to claim 3, characterized in that The number of elastic abutment portions (32) is multiple, and the multiple elastic abutment portions (32) are spaced apart along the axial direction of the cylindrical portion (31).

5. The grouting device of claim 1, wherein The outer wall of the external conduit (1) is provided with a reinforcing structure (13), which is a mesh structure with multiple grids. There are multiple conduit holes (12), and the multiple conduit holes (12) are exposed in the multiple grids one by one.

6. A grouting device according to claim 5, characterized in that The reinforcement structure (13) includes a plurality of first reinforcing ribs (131) and a plurality of second reinforcing ribs (132), wherein the first reinforcing ribs (131) extend along the axial direction of the outer conduit (1) and the second reinforcing ribs (132) extend along the circumferential direction of the outer conduit (1); Multiple first reinforcing ribs (131) are spaced apart circumferentially along the outer conduit (1), and multiple second reinforcing ribs (132) are spaced apart axially along the outer conduit (1). Multiple first reinforcing ribs (131) and multiple second reinforcing ribs (132) intersect to form multiple grids.

7. The grouting device according to claim 5, characterized in that The reinforcement structure (13) is disposed on the pipe wall corresponding to the outer conduit (1) and the grouting area.

8. The grouting device of claim 1, wherein The outer conduit (1) is provided with a tapered structure at a closed end thereof, and the diameter of the tapered structure gradually decreases in a direction away from the opening along the axial direction of the outer conduit (1).

9. The grouting device of claim 1, wherein The number of the injection holes (21) corresponding to each grouting area is multiple, and the multiple injection holes (21) are arranged at intervals at least along the circumferential direction of the grouting pipe (2), and each injection hole (21) extends along the axial direction of the outer conduit (1).

10. The grouting device of claim 1, wherein The outer conduit (1) is a plastic pipe.

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