Yielding anchor cable

Abstract

The invention discloses a yielding anchor cable. The yielding anchor cable comprises a cable body and a yielding mechanism; the yielding mechanism comprises an inner cylinder body, an outer cylinder body, a cylinder cover, a piston ring and piston rods, wherein the inner cylinder body is a hollow cylinder, the cylinder cover is provided with a center hole and rod holes matched with the piston rods, and the cable body penetrates through a hollow part of the inner cylinder body a center hole of the cylinder cover and is linked with the piston rods; a working chamber, of which the section is of an annular shape, is formed by the inner cylinder body, the outer cylinder body and the cylinder cover, the piston ring is arranged in the working chamber, the top of the piston ring is connected with the at least two piston rods, a compression medium is arranged between the bottom part of the piston ring and the bottom part of the working chamber, and the piston rod penetrates through the rod holes and is driven to move by the cable body; a pressure releasing pathway is arranged at the bottom of the inner cylinder body, and is internally provided with a safety valve which is automatically started and closed according to a preset pressure valve. The yielding anchor cable provided by the invention is higher in permitted deformation, high in bearing capacity and constant in resistance, and the large deformation demand of surrounding rocks can be met.

Description

technical field [0001] The invention relates to a geotechnical engineering anchoring device, in particular to a yield anchor cable. Background technique [0002] Anchor cables are the most commonly used anchoring structures in geotechnical engineering, and have a large number of applications in fields such as slope support engineering, tunnel surrounding rock support, and mining roadway support; traditional anchor cables are basically rigid structures, and are not tolerant of deformation. When the quality of the rock mass is poor and the amount of deformation is large, and when dynamic loads such as earthquakes and blasting vibrations act, the anchor cables are pulled off and cause engineering instability and damage. In the case of large deformation and surrounding rock, it is a better engineering solution to use anchor cables that can tolerate large deformation and have a certain yield (ie yield capacity); at present, there are new types of anchor cables that provide large ...

AI Technical Summary

Problems solved by technology

[0002] Anchor cables are the most commonly used anchoring structures in geotechnical engineering, and have a large number of applications in fields such as slope support engineering, tunnel surrounding rock support, and mining roadway support; traditional anchor cables are basically rigid structures, and are not tolerant of deformation. When the quality of the rock mass is poor and the amount of deformation is large, and when dynamic loads such as earthquakes and blasting vibrations act, the anchor cables are pulled off and cause engineering instability and damage. In the case of large deformation and surrounding rock, it is a better engineering solution to use anchor cables that can tolerate large deformation and have a certain yield (ie yield capacity); at present, there are new types of anchor cables that provide large deformation through the ductility of the anchor cable itself. Anchor cable, the structure of this kind of anchor cable is not much different from that of ordinary anchor cable, but it has high requirements on the ductility of the material, and the allowable deformation is generally still small, the bearing capacity is low, and the resistance is not constant, which cannot meet the large deformation of the surrounding rock.

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