Self-adaptive deformation pre-stressed anchor cable anchorage pier structure

Abstract

A self-adaptive deformation pre-stressed anchor cable anchorage pier structure comprises a guide steel pipe, a steel strand penetrates through the guide steel pipe, the guide steel pipe is fixedly sleeved with an upper base plate and a lower base plate, a deformation adjuster is arranged between the upper base plate and the lower base plate, and the deformation adjuster can be pulled up or compressed to deform in the interval direction of the upper base plate and the lower base plate. The situation that the anchor cable is excessively stretched or loosened due to stress of the anchor cable can be relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rock mass support, and particularly relates to a self-adaptive deformable prestressed anchor cable anchor pier structure. Background Art

[0002] Prestressed anchor cables are a common support and reinforcement method in projects such as high slopes, deep foundation pits, and underground caverns. Their principle is to enhance the stability of the rock and soil by transferring the tensile force generated by the pre-stretched anchor cable strands. Therefore, maintaining the tensile stress level of the anchor cable is key to ensuring its effectiveness.

[0003] However, when faced with weak surrounding rock and complex geological conditions, excavation construction may cause the surrounding rock stress to release and then produce large deformation, causing the anchor cable tension to exceed the tensile limit and cause anchor cable failure such as steel strand breakage and anchor section damage; or the anchor cable tension may relax due to creep deformation and compression deformation of the rock and soil.

[0004] Traditional prestressed anchor cables have fixed anchor piers. When the cable is stretched passively, it is only supported by the allowable elongation of the steel strands. When the cable tension relaxes, it must be re-tensioned to maintain the original tension. Excessive cable elongation or cable relaxation will lead to cable failure, and the completed cable will have little effect on enhancing soil stability. Utility Model Content

[0005] The utility model provides a prestressed anchor cable anchor pier structure with self-adaptive deformation, so as to solve the technical problem that it is difficult to anchor the soil after the anchor cable is deformed.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A prestressed anchor cable anchor pier structure with adaptive deformation includes a guide steel pipe with a steel strand passing through the guide steel pipe. The characteristic is that an upper pad and a lower pad are fixed to the outer surface of the guide steel pipe, and a deformation adjuster is provided between the upper pad and the lower pad. The deformation adjuster can be pulled up or compressed and deformed along the spacing direction between the upper pad and the lower pad.

[0008] Furthermore, the deformation adjuster includes a plurality of unit elements, which are evenly spaced and arranged around the circumference of the guide steel pipe, and both ends of each unit element are fixed to the upper pad and the lower pad respectively.

[0009] Furthermore, the unit element is an elastic steel component with flat upper and lower ends and an elliptical tube shape in the middle.

[0010] Furthermore, when the diameter increment of any unit element is at its maximum compression deformation, L, the distance S between any two adjacent unit elements is not less than twice the diameter increment L.

[0011] Furthermore, the deformation regulator is provided with multiple layers, the structure of the deformation regulator in each layer is the same, and the multiple unit elements of two adjacent layers are provided in a one-to-one correspondence.

[0012] Furthermore, an anchor is provided at the end of the guide steel pipe extending out of the anchor hole, and the anchor is fixed to the end of the steel strand passing through the guide steel pipe and the upper pad at the same time.

[0013] Furthermore, a protective cap is fixed on the upper pad, and the protective cap surrounds one end of the steel strand extending out of the guide steel pipe and the anchor, and the protective cap is filled with anti-corrosion grease.

[0014] The utility model can achieve the following beneficial effects:

[0015] 1. The anchor pier structure of the present application sets a deformation adjuster between the upper pad and the lower pad, so that when the steel strand of the anchor cable is passively stretched, the extrusion pressure between the upper pad and the lower pad increases, the deformation adjuster is compressed and shortened, and the deformation adjuster can share the additional tension borne by the steel strand, making the steel strand less likely to break; when the steel strand of the anchor cable is deformed and shortened, the extrusion pressure between the upper pad and the lower pad decreases, the deformation adjuster is decompressed and extended, so that the steel strand maintains the original tension level, thereby making the steel strand of the anchor pier structure of the present application less likely to fail under the action of external force, and can extend the service life of the anchor pier structure.

[0016] 2. A protective cap is set on the upper pad and filled with anti-corrosion grease to seal the end of the steel strand extending from the guide steel pipe, thereby reducing the impact of the external environment on the service life of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a vertical cross-sectional schematic diagram of a prestressed anchor cable anchor pier structure with adaptive deformation according to the present invention;

[0019] Figure 2 It is a vertical cross-sectional diagram of the anchor cable anchor pier structure of the utility model when two layers of deformation regulators are provided;

[0020] Figure 3 for Figure 1 Cross-section of AA.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Guide steel pipe; 2. Steel strand; 3. Upper pad; 4. Lower pad; 5. Deformation adjuster; 51. Unit element; 6. Anchor; 7. Protective cap; 8. Leveling concrete. DETAILED DESCRIPTION

[0023] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0024] like Figures 1 to 3 As shown, a self-adaptive deformable prestressed anchor cable anchor pier structure includes a guide steel pipe 1, in which a steel strand 2 is arranged. The steel strand 2 is tensioned to continuously give an anchoring force to the soil layer, thereby achieving stability of the soil layer.

[0025] Anchor cable holes are drilled in the surrounding rock excavation surface, and a guide steel pipe 1 of appropriate size is placed in the drilled hole. The guide steel pipe 1 is partially buried in the soil layer and partially extends out of the soil layer. After the guide steel pipe 1 is constructed, the steel strand 2 is installed in the guide steel pipe 1. Leveling concrete 8 is poured on the surrounding rock excavation surface to harden the soil layer around the guide steel pipe 1 to facilitate the construction of subsequent steps.

[0026] The portion of the guide steel pipe 1 extending out of the soil layer is externally sleeved and fixed with an upper pad 3 and a lower pad 4. The lower pad 4 is in contact with the surface of the leveling concrete 8. The upper pad 3 and the lower pad 4 are spaced apart, and a deformation adjuster 5 is provided between the upper pad 3 and the lower pad 4. The deformation adjuster 5 can be provided in one or more layers. The drawings of this application disclose embodiments in which one layer of deformation adjuster 5 and two layers of deformation adjuster 5 are provided.

[0027] Each layer of deformation adjusters 5 has an identical structure and includes multiple spaced-apart unit elements 51 evenly arranged around the guide steel tube 1. Specifically, the unit elements 51 are elastic steel members with flat top and bottom ends and an elliptical tubular shape in the middle. When the steel strands 2 are pulled, the spacing between the upper and lower pads 3 and 4 is shortened by compressing the unit elements 51, thereby compensating for the tension on the steel strands 2.

[0028] Furthermore, the diameter increment of any unit element 51 when it is under maximum compression deformation is set to L, and the distance S between any two adjacent unit elements 51 is not less than twice the diameter increment L. Then, by controlling the spacing between the unit elements 51, the unit elements 51 do not collide with each other when the unit elements 51 undergo maximum compression deformation.

[0029] Specifically, if the deformation adjuster 5 is provided in only one layer, the ends of each unit element 51 are welded to the upper and lower pads 3 and 4, respectively. If the deformation adjuster 5 is provided in multiple layers, the units 51 in two adjacent layers of deformation adjusters 5 are provided in a one-to-one correspondence and welded to each other. The number of layers of deformation adjusters 5 and the number of units 51 in each layer can be flexibly adjusted according to the needs of the anchor cable design. The length, wall thickness, middle diameter, and end diameter of the units 51 can also be flexibly adjusted according to the needs of the anchor cable design.

[0030] An anchor 6 is also provided on the side of the upper plate 3 away from the lower plate 4, which secures the steel strand 2 to the upper plate 3. Furthermore, a protective cap 7 is provided above the anchor 6. The protective cap 7 is fixed to the upper plate 3 and, together with the upper plate 3, encloses the anchor 6 and the end of the steel strand 2. The protective cap 7 is filled with anti-corrosion grease, which seals the end of the steel strand 2 and reduces the possibility of rust at the protruding end of the steel strand 2.

[0031] The present application discloses a prestressed anchor cable anchor pier structure with adaptive deformation. When the anchor cable's steel strand 2 is passively stretched, the extrusion force between the upper pad 3 and the lower pad 4 increases, and the deformation adjuster 5 is compressed and shortened. The deformation adjuster 5 can share the additional tension borne by the steel strand 2, making the steel strand 2 less likely to break. When the anchor cable's steel strand 2 is deformed and shortened, the extrusion force between the upper pad 3 and the lower pad 4 decreases, and the deformation adjuster 5 is decompressed and extended, allowing the steel strand 2 to maintain its original tension level. By providing the deformation adjuster 5, the anchor pier can share the deformation of the anchor cable with the steel strand 2, thereby enhancing the safety of the anchor cable and reducing its failure risk.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A prestressed anchor cable anchor pier structure with adaptive deformation, comprising a guide steel pipe (1), wherein a steel strand (2) passes through the guide steel pipe (1), and characterized in that: An upper pad (3) and a lower pad (4) are fixedly connected to the outer surface of the guide steel pipe (1), and a deformation regulator (5) is provided between the upper pad (3) and the lower pad (4). The deformation regulator (5) can be stretched or compressed along the spacing direction between the upper pad (3) and the lower pad (4).

2. The self-adaptive deformable prestressed anchor cable anchor pier structure according to claim 1, characterized in that: The deformation regulator (5) comprises a plurality of unit elements (51), the plurality of unit elements (51) being evenly spaced and arranged around the circumference of the guide steel pipe (1), and the two ends of each unit element (51) being fixed to the upper pad (3) and the lower pad (4), respectively.

3. The self-adaptive deformable prestressed anchor cable anchor pier structure according to claim 2, characterized in that: The unit element (51) is an elastic steel member with flat upper and lower ends and an elliptical tube shape in the middle.

4. The self-adaptive deformable prestressed anchor cable anchor pier structure according to claim 2 or 3, characterized in that: When any unit element (51) is in maximum compression deformation, the diameter increment is L, and the distance S between any two adjacent unit elements (51) is not less than twice the diameter increment L.

5. The self-adaptive deformable prestressed anchor cable anchor pier structure according to claim 2, characterized in that: The deformation regulator (5) is provided with multiple layers, the structure of the deformation regulator (5) in each layer is the same, and the multiple unit elements (51) in two adjacent layers are provided in a one-to-one correspondence.

6. The self-adaptive deformable prestressed anchor cable anchor pier structure according to claim 1, characterized in that: The end of the guide steel pipe (1) extending out of the anchor hole is provided with an anchor (6), and the anchor (6) is fixed to the end of the steel strand (2) passing through the guide steel pipe (1) and the upper pad (3).

7. The self-adaptive deformable prestressed anchor cable anchor pier structure according to claim 6, characterized in that: A protective cap (7) is also fixed on the upper pad (3), and the protective cap (7) encloses one end of the steel strand (2) extending out of the guide steel pipe (1) and the anchor (6), and the protective cap (7) is filled with anti-corrosion grease.

Images