Radial internal expansion resistance-increasing anchor cable supporting device and method

Abstract

The invention provides a radial internal expansion resistance-increasing anchor cable supporting device and method, and relates to the technical field of geotechnical engineering supporting. High-performance anchoring can be achieved, the supporting performance of a single anchor cable is enhanced, the structure is exquisite, the construction speed is high, and the self-expansion effect is achieved. The device comprises a steel strand bundle, and one end of the steel strand bundle sequentially penetrates through a fixed connecting sleeve, a plurality of resistance-increasing pieces and a steel sleeve; the steel strand bundle is fixedly connected with the fixed connecting sleeve, the resistance-increasing pieces and the steel sleeve; a tray structure is arranged at the other end of the steel strand bundle; the resistance-increasing pieces are of a hollow structure and are in an inwards-convex sheet shape as a whole, and the inwards-convex faces are close to the end provided with the tray structure; and when the device is subjected to the huge drawing force effect, pressure relief is achieved through self expansion, meanwhile, the tensile resistance is increased, and anchor cable anchoring failure is avoided. The technical scheme is suitable for the rock stratum supporting process.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering support, in particular to a radially inner expansion resistance increasing bolt cable support device and method. Background technique [0002] Anchor cable support is an important part of the reinforcement of underground engineering rock mass structure. With the help of the anchoring effect of anchor cables, the coordination between the anchor structure and the surrounding rock mass can be realized, the overall stability of the underground space can be strengthened, and the safety construction of underground engineering can be provided. Adequate technical support. At present, according to different support requirements, different types of anchor bolts are selected at the project site, which can be divided into strength anchor cables, yield anchor cables, and energy-absorbing anchor cables. [0003] The traditional anchor cable support structure is an end-anchor or full-anchor str...

AI Technical Summary

Problems solved by technology

[0003] The traditional anchor cable support structure is an end-anchor or full-anchor structure. During the migration of the roof stratum, the anchoring agent and the rock mass are prone to debonding, which leads to the failure of the anchor cable anchorage structure. Especially in high-stress anchorage areas, a single The anchoring failure of the anchor cable can easily trigger a chain reaction, resulting in the failure of the regional support of the working face, affecting the safety of the working face and threatening the normal production of the working face

Images