Grouting stopping bag structure for anchor cable construction grouting
By combining a plastic ring, a rubber ring, a sponge strip, and geotextile in the grout-stopping ring design, the problem of grout leakage in geotextile grout-stopping bags under complex geological conditions is solved, achieving a more efficient grout-stopping effect, especially effective sealing in humid environments.
Patent Information
- Application Number
- CN202520452312.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing geotextile grout-stopping bags are not effective at stopping grouting under high grouting pressure or complex geological conditions. Grout may leak through pores, especially in rock masses with many fractured zones, where it is difficult to effectively prevent grout leakage.
The grout-stopping ring is composed of a plastic ring and a rubber ring. The outer ring is wrapped with high-density sponge strips and multiple layers of geotextile. Through the cooperation of the piston disc and the expansion rod, the rubber ring and sponge strip expand and block the gap when they come into contact with the grout. Combined with the geotextile to intercept solid particles, multi-layer protection is achieved.
It effectively prevents grout leakage and improves the grout-stopping effect under complex geological conditions. It can maintain sealing even in humid environments and prevent grout diffusion.
Smart Images
Figure CN223825018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of underground engineering construction equipment technology, and in particular to a grout-stopping bag structure for anchor cable construction grouting. Background Technology
[0002] Prestressed anchor cable construction involves drilling through weak rock layers or sliding surfaces, anchoring one end (the anchor rod) into hard rock, and then tensioning the other free end to apply pressure to the rock layer and anchor unstable rock masses. Currently, in prestressed anchor cable construction, when using anchor cables bundled with smooth steel strands, grout-stop rings are installed at the boundary between the anchor section and the extension section to prevent grout from flowing between sections during grouting operations. This ensures the effectiveness of segmented grouting.
[0003] In existing technologies, geotextile grout-stopping bags are used as grout-stopping accessories in anchoring sections. The outer side of the grout-stopping bag is made of two layers of geotextile, and the inside is filled with geotextile. Both ends are tied securely with thin iron wire. A separate grouting pipe is used for grouting the grout-stopping bag section. However, it has been found in use that although geotextile grout-stopping bags can play a certain role in stopping grouting under normal conditions, the grout-stopping effect may be affected when encountering large grouting pressure or complex geological conditions. For example, in grouting of rock masses with many fractured zones, the grout may leak through the pores of the geotextile or due to the poor adhesion between the geotextile and the borehole wall.
[0004] Therefore, it is necessary to provide a new grout-stopping bag structure for anchor cable construction grouting to solve the above-mentioned technical problems. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a grout-stopping bag structure for anchor cable construction grouting.
[0006] The anchor cable grouting grouting bag structure provided by this utility model includes a grouting ring, on which a through anchor pipe is fixedly installed and coaxially arranged, and the through anchor pipe and the inner cavity of the grouting ring form a grout filling cavity.
[0007] The outer ring wall of the anti-grouting ring is composed of a plastic ring surface and a rubber ring surface. The plastic ring surface and the rubber ring surface are fixedly connected to each other and distributed vertically. The outer ring wall of the rubber ring surface is wrapped with multiple layers of high-density sponge strips.
[0008] A piston disc is fitted onto the through anchor pipe, and the piston disc is located inside the grout filling cavity. Multiple expansion rods that rotate to support the outer rubber ring surface are installed on the lower wall of the piston disc.
[0009] Preferably, both ends of the expansion rod are equipped with rotating seats that are rotatably connected. The rotating seat at one end of the expansion rod is fixedly connected to the disc wall near the axis on the lower surface of the piston disc, and the other end of the expansion rod is fixedly connected to the inner ring surface near the center of the rubber ring surface.
[0010] Preferably, the inner cavity of the piston disc is slidably connected to the through anchor pipe, and the outer wall of the piston disc is slidably connected to the inner ring surface of the plastic ring.
[0011] Preferably, a grouting pipe is fixedly installed on the grouting ring, and mortar is added to the grouting cavity above the piston disc through the grouting pipe.
[0012] Preferably, the outer ring wall of the plastic ring is provided with an annular groove, and multiple layers of geotextile are wound inside the annular groove.
[0013] Preferably, the two ends of the through anchor pipe extend to the upper and lower annular surfaces of the grout-stopping ring, respectively.
[0014] Compared with related technologies, the grout-stopping bag structure for anchor cable construction grouting provided by this utility model has the following beneficial effects:
[0015] This invention connects the slurry guide pipe to the grouting pipe port, thereby adding mortar to the grouting cavity above the piston disc. As the mortar fills the grouting cavity above the piston disc, the piston disc slides down along the anchor pipe, thus driving the piston disc to press against the expansion rod. This causes the other end of the expansion rod to support the rubber ring surface, blocking the surrounding gaps and holes to prevent slurry leakage. Because the outer wall of the rubber ring surface is wrapped with multiple layers of high-density sponge strips, when it comes into contact with water in the slurry or is in a humid environment, the high-density sponge strips will quickly absorb water and expand in volume, thereby blocking the surrounding gaps and holes and further improving the grout-stopping effect. Attached Figure Description
[0016] Figure 1 A schematic diagram of a preferred embodiment of the grout-stopping bag structure for anchor cable construction grouting provided by this utility model;
[0017] Figure 2 for Figure 1 A schematic cross-sectional view of the grout stop ring shown.
[0018] Figure 3 for Figure 2 The diagram shows the structural connection between the piston disc and the expansion rod.
[0019] Figure 4 for Figure 2 The diagram shows a cross-sectional view of the grout-stopping ring and the through-anchor pipe. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0021] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.
[0022] Please see Figures 1 to 4 This utility model provides a grout-stopping bag structure for anchor cable construction grouting, which includes a grout-stopping ring 1, a piston disc 2, and a support rod 3.
[0023] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 and Figure 4 An anchor pipe 11 is fixedly installed on the grout-stopping ring 1, penetrating the grout-stopping ring 1 and coaxially arranged with the grout-stopping ring 1. The anchor pipe 11 and the inner cavity of the grout-stopping ring 1 form a grout-filling cavity 1a. Both ends of the anchor pipe 11 extend out of the upper and lower annular surfaces of the grout-stopping ring 1.
[0024] It should be noted that: both the grouting pipe and the anchor cable pass through the through anchor pipe 11. The geotextile strip is wrapped around both extended ends of the through anchor pipe 11 and tied with steel wire to fix it to the grouting pipe and anchor cable passing through the through anchor pipe 11. Epoxy resin sealing is then added to ensure that the two ends of the grouting pipe and anchor cable passing through the through anchor pipe 11 are sealed.
[0025] In the embodiments of this utility model, please refer to Figure 1 , Figure 2 and Figure 3 The outer ring wall of the grout-stopping ring 1 is composed of a plastic ring surface 121 and a rubber ring surface 122. The plastic ring surface 121 and the rubber ring surface 122 are fixedly connected to each other and distributed vertically. A piston disc 2 is sleeved on the through anchor pipe 11 and the piston disc 2 is located in the grout filling cavity 1a. A grouting pipe port 13 is fixedly installed on the grout-stopping ring 1. Grout is added to the grout filling cavity 1a above the piston disc 2 through the grouting pipe port 13. The inner disc cavity of the piston disc 2 is slidably connected to the through anchor pipe 11, and the outer disc wall of the piston disc 2 is slidably connected to the inner ring surface of the plastic ring surface 121. Multiple expansion rods 3 are installed on the lower disc wall of the piston disc 2 for rotating and supporting the rubber ring surface 122.
[0026] Both ends of the expansion rod 3 are equipped with rotating seats 31 that are rotatably connected. The rotating seat 31 at one end of the expansion rod 3 is fixedly connected to the disc wall near the axis on the lower surface of the piston disc 2, and the other end of the expansion rod 3 is fixedly connected to the inner annular surface near the center of the rubber annular surface 122.
[0027] It should be noted that: the slurry guide pipe is connected to the grouting pipe port 13, so that mortar is added to the grouting cavity 1a above the piston disc 2. As the mortar fills the grouting cavity 1a above the piston disc 2, the piston disc 2 slides down along the through anchor pipe 11, thus driving the piston disc 2 to press down against the expansion rod 3, so that the other end of the expansion rod 3 supports the rubber ring surface 122, blocking the surrounding gaps and holes to prevent slurry leakage.
[0028] Furthermore, the outer ring wall of the plastic ring 121 is provided with an annular groove, and multiple layers of geotextile 4 are wound inside the annular groove. By utilizing the porous structure of the geotextile 4, solid particles in the slurry can be effectively intercepted, allowing only water in the slurry to pass through, while cement particles and the like are blocked. At the same time, it prevents a large amount of slurry leakage and controls the diffusion range of the slurry.
[0029] In this embodiment, the outer ring wall of the rubber ring 122 is wrapped with multiple layers of high-density sponge strips. When it comes into contact with water in the slurry or is in a humid environment, the high-density sponge strips will quickly absorb water and expand, thereby blocking the surrounding gaps and holes and further improving the purpose of stopping the slurry.
[0030] The working principle of the grout-stopping bag structure for anchor cable construction grouting provided by this utility model is as follows:
[0031] Both the grouting pipe and the anchor cable are passed through the through-anchor pipe 11. Geotextile strips are wrapped around both extended ends of the through-anchor pipe 11 and tied with steel wire to fix them to the grouting pipe and anchor cable passing through the through-anchor pipe 11. Epoxy resin sealing is then added to ensure the two ends of the grouting pipe and anchor cable passing through the through-anchor pipe 11 are sealed. The grout guide pipe is connected to the grouting pipe inlet 13, thereby adding mortar to the grouting cavity 1a above the piston disc 2. As the mortar fills the grouting cavity 1a above the piston disc 2, the grouting pipe... The piston disc 2 slides down along the anchor pipe 11, thus driving the piston disc 2 to press against the expansion rod 3. This causes the other end of the expansion rod 3 to support the rubber ring surface 122, blocking the surrounding gaps and holes to prevent grout leakage. Because the outer ring wall of the rubber ring surface 122 is wrapped with multiple layers of high-density sponge strips, when it comes into contact with water in the grout or is in a humid environment, the high-density sponge strips will quickly absorb water and expand, increasing in volume, thereby blocking the surrounding gaps and holes and further improving the purpose of stopping grout leakage.
[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A grout-stopping bag structure for grouting during anchor cable construction, characterized in that, Includes a grout stop ring (1), on which a through anchor pipe (11) is fixedly installed and is coaxially arranged with the grout stop ring (1), and the through anchor pipe (11) and the inner cavity of the grout stop ring (1) form a grout filling cavity (1a). The outer ring wall of the anti-grouting ring (1) is composed of a plastic ring surface (121) and a rubber ring surface (122). The plastic ring surface (121) and the rubber ring surface (122) are fixedly connected to each other and distributed vertically. The outer ring wall of the rubber ring surface (122) is wrapped with multiple layers of high-density sponge strips. The through anchor pipe (11) is fitted with a piston disc (2), and the piston disc (2) is located in the grouting cavity (1a). The lower wall of the piston disc (2) is equipped with multiple rotating expansion rods (3) for externally supporting the rubber ring surface (122).
2. The grout-stopping bag structure for anchor cable construction grouting according to claim 1, characterized in that, Both ends of the expansion rod (3) are equipped with rotating seats (31) that are rotatably connected. The rotating seat (31) at one end of the expansion rod (3) is fixedly connected to the disc wall near the axis on the lower surface of the piston disc (2), and the other end of the expansion rod (3) is fixedly connected to the inner ring surface near the middle of the rubber ring surface (122).
3. The grout-stopping bag structure for anchor cable construction grouting according to claim 2, characterized in that, The inner cavity of the piston disc (2) is slidably connected to the through anchor pipe (11), and the outer wall of the piston disc (2) is slidably connected to the inner ring surface of the plastic ring surface (121).
4. The grout-stopping bag structure for anchor cable construction grouting according to claim 3, characterized in that, The grouting ring (1) is fixedly installed with a grouting pipe (13), and mortar is added to the grouting cavity (1a) above the piston disc (2) through the grouting pipe (13).
5. The grout-stopping bag structure for anchor cable construction grouting according to claim 1, characterized in that, The outer ring wall of the plastic ring (121) is provided with an annular groove, and multiple layers of geotextile (4) are wrapped inside the annular groove.
6. The grout-stopping bag structure for anchor cable construction grouting according to claim 1, characterized in that, The two ends of the through anchor pipe (11) extend to the upper and lower annular surfaces of the grout stop ring (1), respectively.