A Tension-compression Decentralized Prestressed Anchor Cable

A prestressed anchor cable and decentralized technology, applied in construction, sheet pile wall, foundation structure engineering, etc., can solve the problems of not easily filling the cement slurry, the bearing capacity of the anchor cable is reduced, and the anchor body is not compacted, so as to achieve a compact structure. , the effect of increasing the bearing capacity and reducing the difficulty of construction

Active Publication Date: 2015-12-23
昊鼎地基基础工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bearing body adopted in the above-mentioned utility model is a circular bearing plate. In order to increase the pressure, the cross-sectional area is large, and the distance from the wall of the anchor hole is small. When grouting, the cement slurry at the bearing body is often not easy to fill. The formed anchor is not dense, and it is easy to be damaged under pressure, which reduces the bearing capacity of the anchor cable
[0005] In addition, the prestressed anchor cables using the above-mentioned bearing bodies are mostly permanent anchor cables used in large-scale rock slope support projects. The process is relatively complicated, and they are generally not used in foundation pit projects.

Method used

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  • A Tension-compression Decentralized Prestressed Anchor Cable
  • A Tension-compression Decentralized Prestressed Anchor Cable
  • A Tension-compression Decentralized Prestressed Anchor Cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: as Figure 1 to Figure 3 As shown, the tension-compression dispersion type prestressed anchor cable of the present invention includes an anchor cable bundle body and a cement grouting body 2 that wraps and fixes the anchor cable bundle body. The inner anchor carrier 1 and the centering spacer 4, the part of the steel strand protruding outward from the inner anchor carrier 1 is the non-adhesive section 3, and the part protruding inward from the inner anchor carrier 1 is peeled off as bonded Section 6, the bonded section 6 of each steel strand extends to the bottom of the anchor hole, which can facilitate the preparation of the anchor cable bundle body, and each steel strand uses an extrusion sleeve 5 and an inner anchor carrier 1 Fixed, the inner anchor bearing body 1 is evenly distributed in the length direction of the inner anchor section; in order to keep each steel strand unit straight and not intersected, a centering spacer 4 is arranged every 1m-2m al...

Embodiment 2

[0032] Embodiment 2: as Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the connecting body used to connect the rod body 11 and make the rod body 11 have an interval is not a short rod body 12, but a circular plate 13 with a through hole in the center, and the circular plate 13 and The rod body 11 is welded and fixed or processed in one piece, and the central through hole can pass through the steel strand.

Embodiment 3

[0033] Embodiment 3: as Image 6 As shown, the difference between this embodiment and Embodiment 1 is that the inner anchor carrier is not a cage-shaped cylinder, but an elongated cylinder with grooves extending in the axial direction on the surface. The cross-sectional area of ​​this kind of inner anchor bearing body is small, and it is also suitable for passing only one cable. The groove on the surface can increase the contact area with the grouting body, thereby increasing the bonding force and improving the bearing capacity of the anchor cable. ability.

[0034] In other embodiments, the inner anchor carrier used in the present invention may be a truncated cone with a small top and a large bottom.

[0035] In other embodiments, the inner anchor carrier used in the present invention may be a long cylinder with a spiral groove on its surface.

[0036] In other embodiments, the inner anchor carrier used in the present invention may be a long cylinder with an annular groove ...

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Abstract

The invention discloses a tension and compression dispersing pre-stressed anchor cable which comprises two or more than two inhaul cables. One end of each inhaul cable is fixed into an anchoring hole, a corresponding inner anchoring carrier is fixedly sleeved on each inhaul cable, the outer end of each inner anchoring carrier is provided with a pressure-bearing surface, each inner anchoring carrier is axially provided with an inhaul cable through hole for the corresponding inhaul cable to penetrate, the inner anchoring carriers are positioned at different depths of the anchoring holes, the portion of each inhaul cable extending out of the corresponding inner anchoring carrier is an unbonded section, and the portion of each inhaul cable extending into the corresponding inner anchoring carrier is stripped into a bonded section. The cross-sectional area of each inner anchoring carrier is decreased, the space between each inner anchoring carrier and the wall of the corresponding anchoring hole is enlarged, grout can smoothly flow through the space in grouting, and all positions of inner anchoring sections are densely filled. The tension and compression dispersing pre-stressed anchor cable is compact in structure, the cross-sectional area of each inner anchoring carrier is small, and lowering and grouting of the anchor cable are facilitated.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring, and in particular relates to a tension-compression dispersed prestressed anchor cable. Background technique [0002] Prestressed anchor cable is an anchoring system that can withstand tension and transmit tension to stable rock formations or soils. It is widely used in various fields of geotechnical reinforcement engineering, such as slope stability engineering, underground cavern engineering, structural Anti-floating engineering, deep foundation pit engineering and high-pressure water pipeline engineering, etc. [0003] The prestressed anchor cable includes the anchor cable bundle body (referred to as the bundle body), the outer anchor head and the anchor hole. The bundle body is generally made of a cable (steel strand or steel bar, and the steel bar can also be called an anchor rod) in a certain way. , the inner end is consolidated with the bottom of the anchor hole,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/74
Inventor 王保军王坤王素勤
Owner 昊鼎地基基础工程有限公司
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