Extensible anchor rod structure for slope protection

Abstract

The utility model discloses a telescopic anchor rod structure for side slope protection relates to anchor rod technical field, including anchorage section, the one end fixedly connected with the bearing plate of anchorage section, the lateral wall of bearing plate is embedded and is installed with displacement sensor, the inside fixed insertion of anchorage section has the protection sleeve, the inside movable insertion of protection sleeve has the anchor rod body, the variable diameter spiral spring is arranged between the one side inner wall of anchor rod body and protection sleeve, one side of anchor rod body is equipped with the threaded rod, the utility model discloses telescopic anchor rod structure for side slope protection, through setting up the protection sleeve of anchorage section inside, can protect the telescopic part of anchor rod, avoid its and receive excessive erosion and extrusion, the variable diameter spiral spring of anchor rod body one end and protection sleeve inner wall, can buffer telescopic force, like this telescopic anchor rod can provide the pull -out force through anchorage section, and can adapt to side slope deformation through telescopic section, realizes " reinforcement + buffer " double -faced protection effect.

Description

Technical Field

[0001] This utility model relates to the field of anchor bolt technology, and in particular to a retractable anchor bolt structure for slope protection. Background Technology

[0002] The telescopic anchor structure for slope protection is a new type of anchoring device that adapts to the dynamic deformation of slopes. Its core feature is that while maintaining the anchoring force, it absorbs the slope displacement energy through the expansion and contraction of its own structure, thus avoiding anchor breakage or anchoring failure caused by rigid stress.

[0003] The existing anchor bolt structure is prone to deformation of its expansion joints under stress. Once deformed, it is difficult to retract sensitively. In addition, the expansion joint structure has no buffer, resulting in a single protective effect. Furthermore, the existing anchor bolt structure has a long-term sliding relationship between the expansion joint and the sleeve, which increases the gap and makes it easy for mud and sand to enter, leading to expansion and contraction jamming. Utility Model Content

[0004] The purpose of this invention is to provide a retractable anchor structure for slope protection to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a retractable anchor bolt structure for slope protection, comprising an anchoring section, one end of which is fixedly connected to a bearing plate, a displacement sensor is embedded in the side wall of the bearing plate, a protective sleeve is fixedly inserted inside the anchoring section, an anchor bolt body is movably inserted inside the protective sleeve, a variable diameter helical spring is provided between the anchor bolt body and one inner wall of the protective sleeve, a threaded rod is provided on one side of the anchor bolt body, and an anchor head is sleeved in the middle of the outer wall of the threaded rod; One end of the anchor rod is fixedly connected to a central rod, and a special-shaped sleeve is fixedly fitted on the outer wall of the central rod. A protective end plate is fixedly installed at one end of the protective sleeve.

[0006] As a preferred embodiment of this utility model, one end of the variable diameter helical spring is fixedly connected to the inner wall of one side of the protective sleeve, and the other end of the variable diameter helical spring is fixedly connected to the other end of the anchor rod body.

[0007] By using the above technical solution, a variable diameter helical spring (large diameter in the middle section and small diameter at both ends) is adopted, and high-strength silicon manganese steel is used to increase the extension range from the traditional 200mm to more than 500mm, and the fatigue life is greatly improved.

[0008] As a preferred embodiment of this utility model, a nut is provided on one side of the anchor head, and the nut is threadedly connected to the threaded rod.

[0009] As a preferred technical solution of this utility model, the protective end plate has a shaped groove in the middle, and the shaped groove matches the size of the shaped sleeve.

[0010] By using the above technical solutions, the connection surface is increased, thereby improving the tightness of the connection and avoiding large gaps caused by long-term sliding.

[0011] As a preferred embodiment of this utility model, the irregularly shaped sleeve penetrates the interior of the irregularly shaped groove.

[0012] As a preferred technical solution of this utility model, the outer layer of the anchoring section is wrapped with a polyurea elastomer coating, and the central rod and the irregular sleeve are both made of shape memory alloy.

[0013] The above technical solutions can greatly improve corrosion resistance in highly corrosive environments (such as coastal slopes and acidic soils). Shape memory alloys can recover their original shape after deformation, making them suitable for repeated expansion and contraction scenarios (such as slopes in earthquake-prone areas).

[0014] As a preferred embodiment of this utility model, one end of the threaded rod is fixedly connected to one end of the central rod and one end of the shaped sleeve, and the other end of the shaped sleeve is fixedly connected to one end of the anchor rod body.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention protects the telescopic portion of the anchor rod by installing a protective sleeve inside the anchoring section, preventing excessive erosion and compression. The variable-diameter helical spring at one end of the anchor rod and the inner wall of the protective sleeve buffers the telescopic force. In this way, the telescopic anchor rod can provide pull-out resistance through the anchoring section and adapt to slope deformation through the telescopic section, achieving a dual protection effect of "reinforcement + buffering". The displacement sensor installed on the bearing plate can monitor the relative displacement between the anchoring section and the stratum, and determine whether slippage has occurred by combining the strain data.

[0016] This utility model increases the tightness of the gap by setting an irregularly shaped sleeve and an irregularly shaped groove in the middle of the protective end plate. The polygonal arrangement reduces the risk of large foreign objects getting stuck and prevents mud and sand from entering and affecting the flexible expansion and contraction of the irregularly shaped sleeve. The material is made of shape memory alloy, which can still return to its original shape after being squeezed and deformed, thus avoiding affecting the flexible expansion and contraction of the irregularly shaped sleeve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the irregular-shaped sleeve of this utility model; Figure 3 This is a schematic diagram of the structure of the central rod of this utility model.

[0018] In the diagram: 1. Anchorage section; 2. Displacement sensor; 3. Bearing plate; 4. Protective sleeve; 5. Variable diameter helical spring; 6. Protective end plate; 7. Threaded rod; 8. Anchor head; 9. Nut; 10. Anchor rod body; 11. Irregular sleeve; 12. Irregular groove; 13. Center rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 3 This utility model provides a technical solution for a retractable anchor structure for slope protection: Example 1

[0021] according to Figure 1 As shown, the retractable anchor structure for slope protection includes an anchoring section 1. One end of the anchoring section 1 is fixedly connected to a bearing plate 3. A displacement sensor 2 is embedded in the side wall of the bearing plate 3. A protective sleeve 4 is fixedly inserted inside the anchoring section 1. An anchor rod 10 is movably inserted inside the protective sleeve 4. A variable diameter helical spring 5 is provided between the anchor rod 10 and one side inner wall of the protective sleeve 4. A threaded rod 7 is provided on one side of the anchor rod 10. An anchor head 8 is sleeved in the middle of the outer wall of the threaded rod 7.

[0022] One end of the variable diameter helical spring 5 is fixedly connected to the inner wall of one side of the protective sleeve 4, and the other end of the variable diameter helical spring 5 is fixedly connected to the other end of the anchor rod body 10. A nut 9 is provided on one side of the anchor head 8, and the nut 9 is threadedly connected to the threaded rod 7. A special groove 12 is provided in the middle of the protective end plate 6. The special groove 12 matches the size of the special sleeve 11, and the special sleeve 11 passes through the interior of the special groove 12.

[0023] In practical use, the telescopic anchor structure for slope protection of this utility model involves the operator drilling holes during the installation phase. The anchoring section 1 is then bonded to the hole wall to form pull-out resistance, while simultaneously protecting the telescopic section from being solidified by the grout. Once the grout strength reaches at least 70% of the design value, the external anchor is installed. Specifically, the anchor head 8 is placed against the slope surface. For the anchor rod body 10 requiring pre-tensioning, the design tension force (usually 0.6-0.8 times the design pull-out resistance) is applied using a tensioning device (jack). After slowly tensioning to the specified value, the nut 9 is locked. During use, once the slope undergoes compression displacement deformation, it will cause the anchor rod 10 to shift within the protective sleeve 4. Simultaneously, the variable diameter helical spring 5 at one end can achieve tension buffering. In this way, the telescopic anchor rod can provide pull-out resistance through the anchoring section 1 and adapt to slope deformation through the telescopic section, achieving a dual protection effect of "reinforcement + buffering". The displacement sensor 2 installed on the bearing plate 3 monitors the relative displacement between the anchoring section 1 and the stratum (accuracy ±0.1mm) and judges whether slippage has occurred by combining the strain data. Example 2

[0024] Based on Example 1, such as Figure 1 and Figure 2 , Figure 3 As shown, a central rod 13 is fixedly connected to one end of the anchor rod body 10. A special-shaped sleeve 11 is fixedly sleeved on the outer wall of the central rod 13. A protective end plate 6 is fixedly installed at one end of the protective sleeve 4. The outer layer of the anchoring section 1 is wrapped with a polyurea elastomer coating. Both the central rod 13 and the special-shaped sleeve 11 are made of shape memory alloy. One end of the threaded rod 7 is fixedly connected to one end of the central rod 13 and one end of the special-shaped sleeve 11. The other end of the special-shaped sleeve 11 is fixedly connected to one end of the anchor rod body 10.

[0025] In practical use, the retractable anchor structure for slope protection of this utility model allows the anchor rod 10 to extend and retract relative to the protective sleeve 4, while the irregular sleeve 11 extends and retracts relative to the irregular groove 12 of the protective end plate 6. The irregular sleeve 11 and the irregular groove 12 fit tightly together in a polygonal arrangement, reducing the risk of large foreign objects getting stuck and preventing mud and sand from entering and affecting the flexible extension and retraction of the irregular sleeve 11. The central rod 13 and the irregular sleeve 11 are made of shape memory alloy, which can return to its original shape after deformation when subjected to lateral force, thereby avoiding affecting the flexible extension and retraction of the irregular sleeve 11.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. A retractable anchor structure for slope protection, comprising an anchoring section (1), characterized in that: One end of the anchoring section (1) is fixedly connected to a bearing plate (3). A displacement sensor (2) is embedded in the side wall of the bearing plate (3). A protective sleeve (4) is fixedly inserted inside the anchoring section (1). An anchor rod (10) is movably inserted inside the protective sleeve (4). A variable diameter helical spring (5) is provided between the anchor rod (10) and the inner wall of one side of the protective sleeve (4). A threaded rod (7) is provided on one side of the anchor rod (10). An anchor head (8) is sleeved in the middle of the outer wall of the threaded rod (7). One end of the anchor rod body (10) is fixedly connected to a central rod (13), and a special-shaped sleeve (11) is fixedly sleeved on the outer wall of the central rod (13). A protective end plate (6) is fixedly installed on one end of the protective sleeve (4).

2. The retractable anchor structure for slope protection according to claim 1, characterized in that: One end of the variable diameter helical spring (5) is fixedly connected to the inner wall of one side of the protective sleeve (4), and the other end of the variable diameter helical spring (5) is fixedly connected to the other end of the anchor rod body (10).

3. The retractable anchor structure for slope protection according to claim 1, characterized in that: The anchor head (8) is provided with a nut (9) on one side, and the nut (9) is threadedly connected to the threaded rod (7).

4. The retractable anchor structure for slope protection according to claim 1, characterized in that: The protective end plate (6) has a shaped groove (12) in the middle, and the shaped groove (12) matches the size of the shaped sleeve (11).

5. The retractable anchor structure for slope protection according to claim 1, characterized in that: The irregular sleeve (11) penetrates the interior of the irregular groove (12).

6. The retractable anchor structure for slope protection according to claim 1, characterized in that: The outer layer of the anchoring section (1) is wrapped with a polyurea elastomer coating, and the central rod (13) and the irregular sleeve (11) are both made of shape memory alloy.

7. The retractable anchor structure for slope protection according to claim 1, characterized in that: One end of the threaded rod (7) is fixedly connected to one end of the central rod (13) and one end of the shaped sleeve (11), and the other end of the shaped sleeve (11) is fixedly connected to one end of the anchor rod body (10).

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