Multistage resistance-increasing anchor rod and construction method

Abstract

The invention discloses a multistage resistance-increasing anchor rod and a construction method. The multistage resistance-increasing anchor rod comprises a rod body, wherein a rod body check block is fixed at the front part of the rod body; a jacking rod is connected to the rear part of the rod body; a plurality of self-expandable devices with hollow structures sleeve a rod body between the rod body check block and the jacking rod; the jacking rod can push the self-expandable devices to move; the front part of each self-expandable device is of a conical structure; a hollow connecting rod is arranged at the middle of each self-expandable device; a plurality of wedge sheets are arranged at the rear part of each self-expandable device along the circumferential direction of the self-expandable device; the wedge plates of the adjacent self-expandable devices are connected with the conical structures; a fixing device is arranged at the tail of the rod body, has removability, can be used for changing resistance increasing series and facilitates adopting multiple resistance increasing series settings for engineering practice; the stress is simply applied; the rear ends of the self-expandable devices are expanded by screwing bolts; the wedge plates in a shape like a Chinese character mi at the rear ends of the self-expandable devices adopt the design that the front parts are thick and the rear parts are thin, so the penetration of conical ends is facilitated; meanwhile, the stretched wedge plates can be conveniently inserted into surrounding rock or the insides of surrounding soil bodies, so that the frictional resistance between the rod body and the soil bodies is increased.

Description

technical field [0001] The invention belongs to the field of rock and soil anchoring, and in particular relates to a multi-stage resistance-increasing anchor rod and a construction method. Background technique [0002] Traditional bolts are made of equal section shape, and the pull-out force is mainly provided by the anchor body and rock-soil mass. Under normal circumstances, this value is small, especially in soft soil areas. Due to the poor geological conditions, the anchoring effect is also correspondingly poor. ideal. At present, the core content of research on anchoring technology at home and abroad is to improve the anchor rod structure and construction technology to enhance the anchoring effect. However, many methods to enhance the anchoring effect are not only complicated in process but also high in cost. Contents of the invention [0003] The object of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a multi-stag...

AI Technical Summary

Problems solved by technology

However, many methods to enhance the anchoring effect are not only complicated but also costly.

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