Friction-shear composite quasi-constant-resistance large-deformation anchor cable

Abstract

The invention relates to a friction-shear composite quasi-constant-resistance large-deformation anchor cable so that a problem of poor ductility deformation of a conventional anchor rod can be solved.The anchor cable comprises a sleeve rod and an anchor rod. The sleeve rod includes a large inner diameter section, a ring-shaped first baffle, and a small inner diameter segment; and the first baffleis arranged at a connecting part between the large inner diameter section and the small inner diameter section. The anchor rod passes through the sleeve rod; a circular-truncated-cone-shaped yieldinganchor head sleeves the anchor rod fixedly; the side wall of the yielding anchor head is abutted against the outer end of the large inner diameter section; and the small end surface of the yielding anchor head faces the inner end of the large inner diameter section. An annular shearing core is distributed on the inner wall of the large inner diameter section; the inner wall of the shearing core is inclined in an inclination direction conforming to the inclination direction of the side wall of the yielding anchor head; the shearing strength of the shearing core is smaller than the yielding anchor head; and the shearing strength of the joint between the shearing core and the large inner diameter section is smaller than the shearing strengths of the yielding anchor head and the large inner diameter section. The anchor cable is mainly used for strengthening anchorage of the rock mass.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering anchoring support, in particular to support equipment for large-deformation tunnels or slopes, and in particular to a quasi-constant-resistance large-deformation anchor cable with combined friction and shearing effects. Background technique [0002] Traditional anchor cables and anchor rods in traditional anchor cable structures are used as active geotechnical reinforcement structures, and both have a large number of applications in the fields of support for tunnels, slopes and other projects. Most of the traditional bolts are rigid structures made of metal, which have sufficient support resistance but poor ability to adapt to deformation. Often when natural disasters such as large deformation of rock mass and earthquakes occur, the traditional bolts cannot resist the external pulling force and fail instantly. , causing the disaster to break out in an instant, without a preventive...

AI Technical Summary

Problems solved by technology

In order to provide sufficient support resistance, the manufacturing process and use requirements of friction constant resistance are generally high. During the application process, the friction body will fail due to aging, corrosion and other reasons.

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