Sleeve valve pipe grouting structure and method based on directional pipe and geotechnical cloth bag composite sealing

Abstract

According to the sleeve valve pipe grouting structure and method based on directional pipe and geotechnical cloth bag composite sealing, the geotechnical cloth bag is arranged on the outer side of the sleeve valve pipe in a sleeving mode and covers a grout outlet hole, at least two directional pipes are adjacently arranged on the geotechnical cloth bag in a sleeving mode and located on the upper side and the lower side of the grout outlet hole respectively, and the directional pipes and the geotechnical cloth bag are hooped on the sleeve valve pipe through pipe hoops; the grouting pipe is inserted into the sleeve valve pipe, under the grouting pressure of the grouting pipe, the geotechnical cloth bag expands to press the two adjacent directional pipes to generate elastic deformation so as to be opened to be tightly attached to the hole wall of the grouting hole to form a closed grouting area, and an annular grouting channel is formed in the closed grouting area and used for limiting directional diffusion of grout. By means of the structure, the diffusion direction of grout can be accurately controlled, the continuity and the distribution uniformity of the grout within the preset range are guaranteed, the grouting quality and efficiency are remarkably improved, meanwhile, the grout mixing phenomenon can be prevented, and the situation that the grouting effect and recycling of the sleeve valve pipe are affected due to grout mixing is avoided.

Description

Technical Field

[0001] This invention relates to the field of grouting technology for foundation reinforcement in civil engineering, and in particular to a sleeve valve grouting structure and method based on a composite seal of directional pipe and geotextile bag. Background Technology

[0002] With the acceleration of urbanization, the demand for underground space development and utilization is constantly increasing, and traditional foundation reinforcement methods have shown obvious limitations in dealing with complex geological conditions. To address this challenge, sleeve valve grouting technology has emerged. As a cutting-edge foundation reinforcement method, this technology is widely used in reinforcement projects under various geological conditions such as soil and rock. By forming a continuous reinforcement zone underground, it significantly enhances the bearing capacity and stability of the foundation.

[0003] In practical engineering applications, traditional sleeve valve grouting technology has also revealed several shortcomings, including excessively long solidification time of the casing material, difficulty in effectively controlling the grout flow range, and difficulty in recycling the sleeve valve. Therefore, technicians have made innovative improvements to the traditional sleeve valve grouting technology by adding a high-strength woven geotextile bag to the outside of the sleeve valve. This technology replaces the traditional casing material and uses grouting pressure to unfold the geotextile bag, forming a columnar structure, which effectively restricts the grout flow range and achieves controllability of the grout flow range, thus solving the shortcomings of the traditional technology to a certain extent.

[0004] Nevertheless, the above method still has certain drawbacks. Due to the permeable nature of geotextile bags, an effective sealed environment cannot be formed, allowing grout to still flow up and down through the gaps between the upper and lower binding points of the geotextile bags in the grouting holes, causing grout leakage. This phenomenon suggests that sleeve valve grouting technology still needs further optimization and improvement in achieving a tight seal. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a sleeve valve grouting structure and method based on a composite seal of a directional pipe and a geotextile bag. This structure and method can form a closed grouting area and a circumferential grouting channel within the closed grouting area, thereby controlling the directional diffusion of grout and preventing cross-contamination of grout.

[0006] To solve the above-mentioned technical problems, the present invention provides a sleeve valve pipe grouting structure based on a composite seal of a directional pipe and a geotextile bag, including a sleeve valve pipe, a geotextile bag, a directional pipe, a pipe clamp, and a grouting pipe;

[0007] The sleeve valve tube is provided with a grout outlet hole, and the sleeve valve tube is inserted into the grouting hole;

[0008] The geotextile bag is fitted over the outside of the sleeve valve pipe and covers the slurry outlet hole;

[0009] The directional tube is elastic and at least two are provided. The at least two directional tubes are sleeved adjacently on the geotextile bag and are located on the upper and lower sides of the slurry outlet, respectively.

[0010] The pipe clamp tightly binds the directional pipe and geotextile bag to the sleeve valve pipe;

[0011] The grouting pipe is inserted into the sleeve valve pipe for grouting into the grout outlet hole;

[0012] Under the grouting pressure of the grouting pipe, the geotextile bag expands, forcing the two adjacent directional pipes to undergo elastic deformation and open up to form a closed grouting area that is tightly attached to the wall of the grouting hole. A circumferential grouting channel is formed on the closed grouting area, which is used to restrict the directional diffusion of grout.

[0013] As a further improvement of the present invention, a rubber sleeve for sealing the slurry outlet hole is provided on the sleeve valve pipe, and the rubber sleeve can be ruptured under grouting pressure to open the slurry outlet hole.

[0014] As a further improvement of the present invention, the geotextile bag is made of synthetic fiber material and has a porous structure, which allows slurry to permeate through.

[0015] As a further improvement of the present invention, the directional tube is made of elastic silicone tube, rubber tube or polyurethane tube.

[0016] As a further improvement of the present invention, the pipe clamp is tightened in the middle of the directional pipe, and the slurry outlet is equidistant from the directional pipes on its upper and lower sides.

[0017] As a further improvement of the present invention, there is a gap between two adjacent directional pipes, and the circumferential grouting channel is formed by the gap.

[0018] As a further improvement of the present invention, the diameters of both the geotextile bag sleeve and the directional pipe are at least 2 cm larger than the diameter of the grouting hole.

[0019] As a further improvement of the present invention, the grouting position of the grouting pipe is provided with upper and lower grout stop plugs, and the upper and lower grout stop plugs can be positioned at the grout outlet of the sleeve valve pipe by moving the grouting pipe.

[0020] This invention also provides a sleeve valve grouting method based on a composite seal of directional pipe and geotextile bag, comprising the following steps:

[0021] 1. Fabrication of sleeve valve pipe: Fabricate a sleeve valve pipe with geotextile bag and directional pipe sleeved on it according to the above-mentioned sleeve valve pipe grouting structure based on composite sealing of directional pipe and geotextile bag.

[0022] 2. Drilling: Geological drilling rigs are used to drill grouting holes. The drilling diameter, drilling depth and drilling angle are determined according to the requirements of the design drawings.

[0023] 3. Lowering the sleeve valve tube: After the grouting hole passes the acceptance test, the prepared sleeve valve tube is placed into the grouting hole. The outer circumference of the sleeve valve tube does not need to be filled with casing material. The opening of the grouting hole is sealed with quick-setting mortar.

[0024] 4. Inserting the grouting pipe: Insert the grouting pipe into the sleeve valve pipe and lower the grouting pipe to the predetermined grouting position.

[0025] 5. Start grouting: Grouting is carried out through the grouting pipe. The grout seeps out through the geotextile bag, and the pressure generated by the grouting gradually expands the geotextile bag. After the geotextile bag expands, it drives the directional pipe to expand gradually. After the directional pipe expands, it is tightly attached to the hole wall of the grouting hole, forming a closed grouting area. The grout is controlled within the range of the upper and lower silicone tubes, and a circumferential grouting channel is formed on the closed grouting area. The grout diffuses in a direction through the circumferential grouting channel.

[0026] 6. Moving the grouting pipe: After grouting at this location is completed, move the grouting pipe to the next predetermined grouting location and perform grouting again;

[0027] 7. Repeat steps 5 and 6 above until grouting is completed.

[0028] 8. Recovering the sleeve valve tube: Before the grout completely solidifies, the sleeve valve tube is recovered. Then, the hole used to insert the sleeve valve tube is sealed at the grouting hole with quick-setting mortar. The recovered sleeve valve tube can be reused after cleaning.

[0029] The beneficial effects of this invention are as follows: The invention incorporates directional pipes, and adjacent directional pipes are compressed by geotextile bags to form a closed grouting area. A circumferential grouting channel is formed within this closed grouting area. The closed grouting area and the circumferential grouting channel allow for precise control of grout diffusion, ensuring the continuity and uniformity of grout distribution within a predetermined range, thereby significantly improving grouting quality and efficiency. Simultaneously, the directional pipes confine the grout within the closed grouting area, preventing grout from flowing vertically within the grouting holes and causing cross-contamination. This avoids problems such as grout entering the sleeve valve pipe, sleeve valve pipe deformation, and poor grouting effect caused by cross-contamination, allowing the sleeve valve pipe to be recovered and reused, thus reducing construction costs. Attached Figure Description

[0030] Figure 1 This is a front view of the grouting structure of the sleeve valve tube;

[0031] Figure 2 Schematic cross-section of the sleeve valve pipe grouting structure Figure 1 ;

[0032] Figure 3 Schematic cross-section of the sleeve valve pipe grouting structure Figure 2 ;

[0033] Figure 4 This is a schematic diagram of stage one of the sleeve valve tube grouting method;

[0034] Figure 5 This is a schematic diagram of stage two of the sleeve valve grouting method;

[0035] Figure 6 This is a schematic diagram of stage three of the sleeve valve grouting method;

[0036] Marking descriptions: 1. Sleeve valve pipe, 11. Grout outlet hole, 12. Rubber sleeve, 2. Geotextile bag, 3. Directional pipe, 31. Sealed grouting area, 32. Circumferential grouting channel, 4. Pipe clamp, 5. Grouting pipe, 51. Grout stop plug, 6. Grouting hole Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0038] like Figure 1-6 As shown, a sleeve valve pipe grouting structure based on a composite seal of a directional pipe and a geotextile bag includes a sleeve valve pipe 1, a geotextile bag 2, a directional pipe 3, a pipe clamp 4, and a grouting pipe 5.

[0039] The sleeve valve tube 1 is used to be inserted into the grouting hole 6. Several sets of grout outlet holes 11 are provided on the sleeve valve tube 1 along its length direction. Each set contains 4 to 8 grout outlet holes 11. A rubber sleeve 12 is provided at the position of each set of grout outlet holes 11 to close the grout outlet holes 11. The rubber sleeve 12 can be ruptured under grouting pressure to open the grout outlet holes 11.

[0040] The geotextile bag 2 is fitted onto the sleeve valve pipe 1 along its length and covers each grout outlet 11. The geotextile bag 2 is made of synthetic fiber material and has a porous structure, allowing grout to permeate through. The length of the geotextile bag 2 exceeds the length of the grouting hole 6 by about 50 cm, and its diameter is at least 2 cm larger than the diameter of the grouting hole 6, preferably 2 cm in this embodiment.

[0041] Multiple directional pipes 3 are provided, with each pair of adjacent directional pipes 3 forming a group and being fitted onto the geotextile bag 2. Each group of directional pipes 3 corresponds to a group of grouting holes 6. The two adjacent directional pipes 3 in each group are located on the upper and lower sides of the corresponding grouting hole 6, respectively. The grout outlet 11 is equidistant from the directional pipes 3 on its upper and lower sides. The directional pipes 3 are made of elastic silicone, rubber, or polyurethane tubing; in this embodiment, silicone tubing is preferred. The directional pipe 3 is 45cm long, 3mm thick, and has a diameter at least 2cm larger than the diameter of the grouting hole 6; in this embodiment, 2cm is preferred.

[0042] The pipe clamp 4 tightens the directional pipe 3 together with the geotextile bag 2 onto the sleeve valve pipe 1, and the pipe clamp 4 tightens the directional pipe 3 in the middle, so that the directional pipe 3 is divided into upper and lower halves, ensuring that the upper and lower halves of the directional pipe 3 expand evenly under the grouting pressure. The upper half of the directional pipe 3 corresponds to the previous set of grout outlet holes 11, and the lower half corresponds to the next set of grout outlet holes 11.

[0043] The grouting pipe 5 is a movable perforated pipe that is inserted into the sleeve valve pipe 1. By moving the grouting pipe 5, its grouting position corresponds to the grout outlet 11 of the sleeve valve pipe 1, and it is used to inject grout into the grout outlet 11. Upper and lower grout stop plugs 51 are provided at the grouting position of the grouting pipe 5 to prevent grout from flowing to other grout outlets 11, thereby realizing segmented grouting control.

[0044] Under the grouting pressure of the grouting pipe 5, the grout permeates outward through the geotextile bag 2. In the low-pressure stage, a small amount of grout is filtered out through the gaps in the geotextile bag 2, forming a lubricating film on the inner wall of the directional pipe 3. As the grouting pressure increases, the grout pressure causes the geotextile bag 2 to expand radially, forcing the two adjacent directional pipes 3 to undergo elastic deformation and open up to tightly adhere to the hole wall of the grouting hole 6, forming a closed grouting area 31. This confines the grout between the two directional pipes 3, which has a gap forming a circumferential grouting channel 32. The grout can only diffuse directionally through the circumferential grouting channel 32, thus preventing the grout from flowing up and down in the grouting hole 6 and causing cross-contamination. This achieves precise control of grout diffusion, ensuring the continuity and uniformity of grout distribution within a predetermined range, and significantly improving the quality and efficiency of grouting.

[0045] A sleeve valve grouting method based on a composite seal of directional pipe and geotextile bag, the steps of which are as follows:

[0046] 1. Fabrication of sleeve valve pipe 1: Fabricate sleeve valve pipe 1 with geotextile bag 2 and directional pipe 3 according to the above-mentioned sleeve valve pipe grouting structure based on directional pipe and geotextile bag composite sealing.

[0047] II. Drilling: A geological drilling rig will be used to drill grouting hole 6. The drilling diameter, drilling depth and drilling angle will be determined according to the requirements of the design drawings.

[0048] 3. Lowering the sleeve valve tube 1: After the grouting hole 6 passes the acceptance test, the prepared sleeve valve tube 1 is placed into the grouting hole 6. The outer circumference of the sleeve valve tube 1 does not need to be filled with casing material. The opening of the grouting hole 6 is sealed with quick-setting mortar.

[0049] 4. Inserting the grouting pipe 5: Insert the grouting pipe 5 with upper and lower grout stop plugs 51 into the sleeve valve pipe 1. Lower the grouting pipe 5 to the predetermined grouting position. Before grouting, use a grouting pump to pressurize thin grout or clean water and use the grout pressure to break the rubber sleeve 12.

[0050] 5. Start grouting: Grouting is carried out through grouting pipe 5. The grout seeps out through geotextile bag 2, and the pressure generated by grouting gradually expands geotextile bag 2. After geotextile bag 2 expands, it drives directional pipe 3 to expand gradually. After directional pipe 3 expands, it is closely attached to the hole wall of grouting hole 6 to form a closed grouting area 31. The grout is controlled within the range of the upper and lower silicone tubes. A circumferential grouting channel 32 is formed on the closed grouting area 31. The grout diffuses in a direction through the circumferential grouting channel 32.

[0051] 6. Moving grouting pipe 5: After grouting at this grouting position is completed, move grouting pipe 5 to the next predetermined grouting position and perform grouting again;

[0052] VII. For example Figure 4-6 As shown, a segmented grouting method from bottom to top is adopted, which has three stages: stage one, stage two, and stage three. Steps five and six above are repeated until the segmented grouting is completed.

[0053] 8. Recover sleeve valve tube 1: Before the grout completely solidifies, recover sleeve valve tube 1, and then use quick-setting mortar to seal the grouting holes 6 where sleeve valve tube 1 was inserted. The recovered sleeve valve tube 1 can be reused after cleaning.

[0054] The above-described embodiments are merely illustrative of the present invention. Any equivalent embodiments made by those skilled in the art, without departing from the scope of the technical features disclosed in the present invention, using partial modifications or alterations to the technical content disclosed in the present invention, shall still fall within the scope of the technical features of the present invention.

Claims

1. A sleeve valve grouting structure based on a composite seal of directional pipe and geotextile bag, characterized in that: Includes sleeve valve pipe, geotextile bag, directional pipe, pipe clamp, and grouting pipe; The sleeve valve tube is provided with a grout outlet hole, and the sleeve valve tube is inserted into the grouting hole; The geotextile bag is fitted over the outside of the sleeve valve pipe and covers the slurry outlet hole; The directional tube is elastic and at least two are provided. The at least two directional tubes are sleeved adjacently on the geotextile bag and are located on the upper and lower sides of the slurry outlet, respectively. The pipe clamp tightly binds the directional pipe and geotextile bag to the sleeve valve pipe; The grouting pipe is inserted into the sleeve valve pipe for grouting into the grout outlet hole; Under the grouting pressure of the grouting pipe, the geotextile bag expands, forcing the two adjacent directional pipes to undergo elastic deformation and open up to form a closed grouting area that is tightly attached to the wall of the grouting hole. A circumferential grouting channel is formed on the closed grouting area, which is used to restrict the directional diffusion of grout.

2. The sleeve valve grouting structure based on a composite seal of directional pipe and geotextile bag as described in claim 1, characterized in that: The sleeve valve tube is provided with a rubber sleeve for sealing the slurry outlet. The rubber sleeve can be ruptured under grouting pressure to open the slurry outlet.

3. The sleeve valve pipe grouting structure based on the composite seal of directional pipe and geotextile bag as described in claim 1, characterized in that: The geotextile bag is made of synthetic fiber material and has a porous structure that allows slurry to permeate through.

4. The sleeve valve pipe grouting structure based on the composite seal of directional pipe and geotextile bag as described in claim 1, characterized in that: The directional tube is made of elastic silicone tubing, rubber tubing, or polyurethane tubing.

5. The sleeve valve pipe grouting structure based on the composite seal of directional pipe and geotextile bag as described in claim 1, characterized in that: The pipe clamp is tightened in the middle of the directional pipe, and the slurry outlet is equidistant from the directional pipes on its upper and lower sides.

6. The sleeve valve pipe grouting structure based on the composite seal of directional pipe and geotextile bag according to claim 1, characterized in that: There is a gap between two adjacent directional pipes, and the circumferential grouting channel is formed by the gap.

7. The sleeve valve pipe grouting structure based on the composite seal of directional pipe and geotextile bag according to claim 1, characterized in that: The diameters of both the geotextile bag and the directional pipe are at least 2 cm larger than the diameter of the grouting hole.

8. The sleeve valve grouting structure based on a composite seal of directional pipe and geotextile bag according to claim 1, characterized in that: The grouting pipe is equipped with upper and lower grout stop plugs at the grouting position. By moving the grouting pipe, the upper and lower grout stop plugs can be positioned at the grout outlet of the sleeve valve pipe.

9. A sleeve valve grouting method based on a composite seal of directional pipe and geotextile bag, characterized in that... Includes the following steps:

1. Fabrication of sleeve valve pipe: Fabricate a sleeve valve pipe with geotextile bag and directional pipe sleeved on it according to the sleeve valve pipe grouting structure based on the composite sealing of directional pipe and geotextile bag as described in any one of claims 1 to 8.

2. Drilling: Geological drilling rigs are used to drill grouting holes. The drilling diameter, drilling depth and drilling angle are determined according to the requirements of the design drawings.

3. Lowering the sleeve valve tube: After the grouting hole passes the acceptance test, the prepared sleeve valve tube is placed into the grouting hole. The outer circumference of the sleeve valve tube does not need to be filled with casing material. The opening of the grouting hole is sealed with quick-setting mortar.

4. Inserting the grouting pipe: Insert the grouting pipe into the sleeve valve pipe and lower the grouting pipe to the predetermined grouting position.

5. Start grouting: Grouting is carried out through the grouting pipe. The grout seeps out through the geotextile bag, and the pressure generated by the grouting gradually expands the geotextile bag. After the geotextile bag expands, it drives the directional pipe to expand gradually. After the directional pipe expands, it is tightly attached to the hole wall of the grouting hole, forming a closed grouting area. The grout is controlled within the range of the upper and lower silicone tubes, and a circumferential grouting channel is formed on the closed grouting area. The grout diffuses in a direction through the circumferential grouting channel.

6. Moving the grouting pipe: After grouting at this location is completed, move the grouting pipe to the next predetermined grouting location and perform grouting again; 7. Repeat steps 5 and 6 above until grouting is completed.

8. Recovering the sleeve valve tube: Before the grout completely solidifies, the sleeve valve tube is recovered. Then, the hole used to insert the sleeve valve tube is sealed at the grouting hole with quick-setting mortar. The recovered sleeve valve tube can be reused after cleaning.

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