Internal resistance type metal shear-resisting yield anchor cable device

Abstract

The invention discloses an internal resistance type metal shear-resisting yield anchor cable device. The internal resistance type metal shear-resisting anchor cable pressing device comprises a fixed anchorage head, a shear-resisting yield device and an anchor cable lock tool; the fixed anchorage head is arranged in the surrounding rock, and is connected with the anchor cable lock tool on a surrounding rock drill port through a plurality of steel strands, the anchor cable lock tool is used for exerting prestress to the shear-resisting yield device to form an anchorage structure, the shear-resisting yield device is arranged on the steel strands, a metal protection sleeve and a metal yield ring are included, the surrounding rock drill port is sleeved with the metal protection sleeve, the metal yield ring is arranged in the metal protection sleeve, one ends of the steel strands penetrate the metal yield ring to be connected with the fixed anchorage head, the other end of each steel strand is connected with a metal speed reduction head on the surrounding rock drill port, and the metal speed reduction head loses the rock body deformation capacity of the surrounding rock through shear damage of the metal yield ring. The whole device has the multiple effects of deep layer rock control, rock layer separation deformation prevention, shear resistance, graded constant resistance and the like, and the beneficial effects of being rapid and convenient to mount, stable in property, easy to popularize and the like are achieved.

Description

technical field [0001] The invention belongs to geotechnical engineering support equipment, in particular to a special metal material anti-shear deformation yielding anchor cable structure, which is suitable for support and reinforcement devices and methods in coal mine roadways, tunnels, side slopes, foundation pits and other related engineering fields. Background technique [0002] In the support of geotechnical engineering, tunnel engineering, and slope engineering, the common support equipment is anchor rod and anchor cable. Traditional support equipment often adopts rigid structures due to material and structural limitations. The elongation of the anchor rod The pull-out force of the anchor cable and the anchor cable are limited. For geological conditions where rock mass cracks are relatively developed and deformation and damage are relatively large, support failures often occur, resulting in dangerous situations such as surrounding rock instability. Energy-consuming an...

AI Technical Summary

Problems solved by technology

[0002] In the support of geotechnical engineering, tunnel engineering, and slope engineering, the common support equipment is anchor rod and anchor cable. Traditional support equipment often adopts rigid structures due to material and structural limitations. The elongation of the anchor rod The pull-out force of the anchor cable and the anchor cable are limited. For geological conditions where rock mass cracks are relatively developed and deformation and damage are relatively large, support failures often occur, resulting in dangerous situations such as surrounding rock instability. energy-consuming bolts / cables to solve engineering support problems

[0003] The existing large-deformation bolts / cables are mainly divided into two types in terms of function: one is to use special flexible materials as the rod body and anchor cable structure, and to use the special properties of flexible materials to allow larger Deformation load, the ductility of this type of material is generally high, and the cost is relatively high; the second type is to install a special compressive structure in the anchor rod and anchor cable. Use friction or compression to lose the deformation energy of rock mass, so that the anchor rod / cable can produce constant resistance or variable resistance and other decompression effects

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