Detachable prestress anchor cable

Abstract

The invention discloses a detachable prestress anchor cable. The detachable prestress anchor cable is characterized in that a bearing plate is provided with a center through hole and peripheral conical holes. The center through hole is connected with the adjacent peripheral conical holes through cavities, sliding blocks are arranged in the cavities, clamping sheets are sleeved with the peripheralconical holes, a screw pipe and a clamping sheet are arranged in the center through hole in a sleeved mode, one side of the sliding block is provided with a thread groove, the other side of the sliding block is provided with a circular arc groove, the sliding block is arranged in the cavity, the thread groove on one side is matched with screw pipe, the circular arc groove on the other side is matched with anchor cable clamping sheets, a steel strand in the center through hole is rotated to drive the screw pipe to rotate and retreat from the bearing plate to enter a sealing cap inner cavity, the vacated space enables the sliding blocks to be converged towards the center of the bearing plate, constraint of the anchor cable clamping sheets to the steel strand is released for unlocking, and the steel strand is pulled out for recycling. Compared with the prior art, the structure is simple, anchorage force is large, the problem that anchor cable steel strand wires are damaged after being stressed and low in recycling rate is effectively solved, and the engineering cost is further reduced.

Description

technical field [0001] The invention relates to the technical field of prestressed anchor cables for foundation pit support, in particular to a pressure dispersion type detachable prestressed anchor cable anchorage. Background technique [0002] At present, recyclable anchor cables mainly include mechanical recyclable anchor cables, hot-melt recyclable anchor cables, and mechanical recyclable anchor cables. Although there are many types of recyclable anchor cables and construction techniques, the actual recovery rate has not To meet the design requirements, the mechanical recyclable anchor cable due to the particularity of the anchor head device, leads to waste of materials in use (such as n+1 type), and the wire is damaged under the subdued load, which affects the force of the anchor cable and the performance of reuse ; The installation accuracy of the inner anchor head of the hot-melt recyclable anchor cable is very strict, and the hot-melt system for recycling is easily d...

AI Technical Summary

Problems solved by technology

[0002] At present, recyclable anchor cables mainly include mechanical recyclable anchor cables, hot-melt recyclable anchor cables, and mechanical recyclable anchor cables. Although there are many types of recyclable anchor cables and construction techniques, the actual recovery rate has not To meet the design requirements, the mechanical recyclable anchor cable due to the particularity of the anchor head device, leads to waste of materials in use (such as n+1 type), and the wire is damaged under the subdued load, which affects the force of the anchor cable and the performance of reuse ;The installation accuracy of the inner anchor head of the hot-melt recyclable anchor cable is very strict, the hot-melt system for recycling is easily damaged, which affects the recovery rate, and the construction operation requirements are very high

[0003] The existing recyclable anchor cables have insufficient anchoring force and low wire recovery rate. During the recovery process, the wires are easily damaged after being stressed, resulting in waste of materials. They cannot well adapt to the development concept of energy saving, environmental protection, and green construction in underground spaces.

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