An anchor structure for geotechnical construction

Abstract

This utility model relates to the field of anchor bolt technology, and in particular to an anchor bolt structure for geotechnical construction, including an anchor bolt, a guide head, a sliding sleeve A, an anti-slip plate, and an elastic support assembly. The anchor bolt has a through hole coaxial with it, and several barbs A are provided on its outer wall. The guide head is connected to one end of the anchor bolt and has a grouting hole communicating with the through hole. The sliding sleeve A is fitted onto the anchor bolt, and several sets of connecting rods A are provided on the sliding sleeve A, with two connecting rods A in each set, and the two connecting rods A in the same set are parallel to each other. The anti-slip plate is rotatably connected to the ends of the two connecting rods A on the corresponding side away from the sliding sleeve A. The elastic support assembly is provided on the anchor bolt to expand each connecting rod A, thereby synchronously adjusting the distance between each anti-slip plate and the anchor bolt axis. This utility model improves the pull-out resistance of the anchor bolt and the stability of the connection between the anchor bolt and the geotechnical structure by relying on the anti-slip plate expanded by the elastic support assembly to abut against the inner wall of the rock borehole and by adding the barb structure.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt technology, and in particular to an anchor bolt structure for geotechnical construction. Background Technology

[0002] Anchor bolts used in geotechnical construction are components that reinforce the soil and rock mass by adjusting the strength of the soil and rock itself through tension members. They mainly consist of an anchor head, a bolt body, and an anchoring section. Their core function is to transfer tension force to the stable soil and rock mass, and to bear the tensile force of the structure through the anchoring section, thereby improving the stress state of the soil and rock mass and enhancing its stability.

[0003] Most existing anchor bolts are single-pull-out structures or have protrusions or other pull-out-resistant structures on the surface of the anchor bolt. However, the dimensions of these pull-out-resistant structures cannot be adjusted. They can only be covered by the anchor body and cannot directly contact the soil and rock. As a result, the strength of the soil and rock itself cannot be maximized, and the pull-out stability of the anchor bolt is still poor after it is buried. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing an anchor structure for geotechnical construction.

[0005] The technical solution of this utility model is: an anchor structure for geotechnical construction, including an anchor, a through hole coaxial with the anchor, and a plurality of barbs A on the outer wall of the anchor;

[0006] The guide head is connected to one end of the anchor rod, and a grouting hole communicating with the through hole is provided on the guide head;

[0007] Sliding sleeve A is fitted onto the anchor rod and located between the front guide head and the fixed ring. Several sets of connecting rods A are arranged around its axis on the sliding sleeve A. Each set of connecting rods A consists of two rods, and the two connecting rods A in the same set are parallel to each other.

[0008] Anti-slip plates, there are multiple anti-slip plates, and each anti-slip plate is rotatably connected to the end of the two connecting rods A on the corresponding side away from the sliding sleeve A;

[0009] And an elastic support assembly, which is installed on the anchor rod and drives the connection of each group of connecting rods A, so as to open each connecting rod A through the elastic support assembly, so as to synchronously adjust the distance between each anti-slip plate and the anchor rod axis.

[0010] Preferably, a grout stop plug and a support plate are movably installed on the anchor bolt, and a nut that is helically connected to the anchor bolt is also provided on the anchor bolt.

[0011] Preferably, the guide head is spirally connected to the end of the anchor rod away from the nut.

[0012] Preferably, several barbs B are provided on the side of the anti-slip plate away from the anchor rod.

[0013] Preferably, the elastic support assembly includes a sliding sleeve B, a connecting rod B, a fixed ring, and a spring. The fixed ring is sleeved on the anchor rod and fixedly connected to its outer wall. The sliding sleeve B is slidably sleeved on the anchor rod and located between the sliding sleeve A and the fixed ring. The number of connecting rods B is the same as the number of anti-slip plates. One end of the connecting rod B is rotatably connected to the sliding sleeve B. The connecting rods B are arranged in a circular array around the axis of the sliding sleeve B. In the same group of two connecting rods A, only one connecting rod A is rotatably connected to the corresponding connecting rod B. The spring is sleeved on the anchor rod, and the two ends of the spring abut against the sliding sleeve B and the side of the fixed ring that are close to it, respectively.

[0014] Preferably, the sliding sleeve B has a conical structure, and the tip of the sliding sleeve B faces the leading head.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] By setting barbs A, the connection stability between the anchor rod and the anchor body can be improved, and its pull-out resistance relative to the anchor body can be enhanced. By setting a mechanism that combines a sliding sleeve A, a connecting rod A, an anti-slip plate, barbs B, and an elastic support assembly consisting of a sliding sleeve B11, a connecting rod B12, a fixing ring 13, and a spring 14, the anti-slip plate can form a direct connection with the inner wall of the rock and soil after it is inserted into the rock and soil along with the anchor rod. The insertion of barbs B into the rock and soil can more effectively mobilize the strength of the rock and soil itself to reinforce the anchor body and the anchor rod, thereby further improving the pull-out stability of the anchor rod. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure between the anti-slip plate and the sliding sleeves A and B;

[0019] Figure 3 This is a diagram illustrating the application effect of this utility model.

[0020] Attached reference numerals: 1. Anchor bolt; 2. Grout stop plug; 3. Support plate; 4. Nut; 5. Barb A; 6. Lead guide head; 601. Grouting hole; 7. Sliding sleeve A; 8. Connecting rod A; 9. Anti-slip plate; 10. Barb B; 11. Sliding sleeve B; 12. Connecting rod B; 13. Fixing ring; 14. Spring; 15. Rock and soil; 151. Column hole A; 152. Column hole B. Detailed Implementation

[0021] Example 1

[0022] like Figures 1-3As shown, this utility model proposes an anchor bolt structure for geotechnical construction, including an anchor bolt 1, a leading head 6, a sliding sleeve A7, an anti-slip plate 9, and an elastic support assembly. The anchor bolt 1 has a through hole coaxial with it. A grout stop plug 2 and a support plate 3 are movably mounted on the anchor bolt 1, and a nut 4 is helically connected to it. Several barbs A5 are provided on the outer wall of the anchor bolt 1. The leading head 6 is helically connected to the end of the anchor bolt 1 away from the nut 4, and a grouting hole 601 communicating with the through hole is provided on the leading head 6. The sliding sleeve A7 is fitted onto the anchor bolt 1 and located between the leading head 6 and the fixing ring 13. Several sets of connecting rods A8 are arranged around the axis of the sliding sleeve A7, with two connecting rods A8 in each set, and the two connecting rods A8 in the same set are parallel to each other. Multiple anti-slip plates 9 are provided, each anti-slip plate 9 being rotatably connected to the end of the two connecting rods A8 on the corresponding side away from the sliding sleeve A7. Several barbs B10 are provided on the side of the anti-slip plate 9 away from the anchor bolt 1. An elastic support assembly is installed on the anchor rod 1 and drives the connecting rods A8 of each group to open each connecting rod A8, thereby synchronously adjusting the distance between each anti-slip plate 9 and the axis of the anchor rod 1. The elastic support assembly includes a sliding sleeve B11, a connecting rod B12, a fixing ring 13, and a spring 14. The fixing ring 13 is sleeved on the anchor rod 1 and fixedly connected to its outer wall. The sliding sleeve B11 is slidably sleeved on the anchor rod 1 and located between the sliding sleeve A7 and the fixing ring 13. The number of connecting rods B12 is the same as the number of anti-slip plates 9. One end of the connecting rod B12 is rotatably connected to the sliding sleeve B11. The connecting rods B12 are arranged in a ring array around the axis of the sliding sleeve B11, and only one connecting rod A8 in the same group is rotatably connected to the corresponding connecting rod B12. The spring 14 is sleeved on the anchor rod 1, and the two ends of the spring 14 abut against the sliding sleeve B11 and the side of the fixing ring 13 that are close to it, respectively.

[0023] In this embodiment, the sliding sleeve A7, connecting rod A8, anti-slip plate 9, sliding sleeve B11, and connecting rod B12 are pre-assembled as a single unit. When assembling them onto the anchor rod 1, the spring 14 is first placed on the anchor rod 1, followed by the sliding sleeve B11 and sliding sleeve A7 being sequentially placed on the anchor rod 1, with the sliding sleeve B11 contacting the spring 14. Then, the front guide head 6 is screwed on. During construction, a smaller inner diameter post hole A151 is first drilled in the rock and soil 15 using a mechanical double-expanding cutter. Then, the outer diameter of the cutter is adjusted to drill a larger inner diameter post hole B152 at the bottom of post hole A151, which is coaxial with post hole A151. The anti-slip plate 9 is then retracted, and the front guide head 6 and anti-slip plate 9 are inserted into the post hole. After the anti-slip plate 9 enters the post hole B152, due to the pushing force of the spring 14 on the sliding sleeve B11, the sliding sleeve B11 slides towards the sliding sleeve A7, thereby utilizing the connecting rod B12. 12. Spread out the connecting rod A8. At this time, each anti-slip plate 9 will be spread out simultaneously and come into contact with the inner wall of the column hole B152. The barb B10 will be inserted into the soil and rock. Then, put on the grout stop plug 2 and the support plate 3 and tighten the anchor rod 1 on the mounting base with the nut 4. Adjust the grouting pressure according to the soil and rock properties and start grouting. The grout enters the column hole B152 along the through hole and the grouting hole 601 and gradually fills the column hole B152 and the column hole A151 to form an anchor body. The barb A5 is also covered by the anchor body.

[0024] Example 2

[0025] like Figures 1-3 As shown, the rock and soil construction anchor structure proposed in this utility model has a conical structure for the sliding sleeve B11 compared to Embodiment 1, and the tip of the sliding sleeve B11 faces the front guide head 6.

[0026] In this embodiment, the sliding sleeve B11 is set into a conical structure, which can prevent the grout from pushing the sliding sleeve B11 towards the fixed ring 13 during grouting, so that the anti-slip plate 9 retracts and detaches from the inner wall of the rock hole.

[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An anchor structure for geotechnical construction, characterized in that, include: Anchor rod (1), with a through hole coaxial with it inside the anchor rod (1), and several barbs A (5) are provided on the outer wall of the anchor rod (1); A guide head (6) is connected to one end of the anchor rod (1), and a grouting hole (601) communicating with the through hole is provided on the guide head (6); Sliding sleeve A (7) is fitted on the anchor rod (1) and located between the front guide head (6) and the fixing ring (13). Several sets of connecting rods A (8) are arranged around its axis on the sliding sleeve A (7). There are two connecting rods A (8) in each set, and the two connecting rods A (8) in the same set are parallel to each other. Anti-slip plate (9), there are multiple anti-slip plates (9), each anti-slip plate (9) is rotatably connected to the end of the corresponding two connecting rods A (8) away from the sliding sleeve A (7); And an elastic support assembly, which is set on the anchor rod (1) and drives the connecting rods A (8) to open each connecting rod A (8) through the elastic support assembly, so as to synchronously adjust the distance between each anti-slip plate (9) and the axis of the anchor rod (1).

2. The anchor structure for geotechnical construction according to claim 1, characterized in that, An anchor rod (1) is movably fitted with a grout stop plug (2) and a support plate (3), and a nut (4) is provided on the anchor rod (1) for spiral connection with it.

3. The anchor structure for geotechnical construction according to claim 2, characterized in that, The lead head (6) is screwed to the end of the anchor rod (1) away from the nut (4).

4. The anchor structure for geotechnical construction according to claim 1, characterized in that, Several barbs B (10) are provided on the side of the anti-slip plate (9) away from the anchor rod (1).

5. The anchor structure for geotechnical construction according to claim 1, characterized in that, The elastic support assembly includes a sliding sleeve B (11), a connecting rod B (12), a fixing ring (13), and a spring (14). The fixing ring (13) is sleeved on the anchor rod (1) and fixedly connected to its outer wall. The sliding sleeve B (11) is slidably sleeved on the anchor rod (1) and located between the sliding sleeve A (7) and the fixing ring (13). The number of connecting rods B (12) is the same as the number of anti-slip plates (9). One end of the connecting rod B (12) is rotatably connected to the sliding sleeve B (11). The connecting rods B (12) are arranged in a ring array around the axis of the sliding sleeve B (11). In the same group of two connecting rods A (8), only one connecting rod A (8) is rotatably connected to the corresponding connecting rod B (12). The spring (14) is sleeved on the anchor rod (1). The two ends of the spring (14) abut against the side of the sliding sleeve B (11) and the side of the fixing ring (13) respectively.

6. The anchor structure for geotechnical construction according to claim 5, characterized in that, The sliding sleeve B(11) has a conical structure, and the tip of the sliding sleeve B(11) faces the front guide head (6).

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