Steel wire bundle anchor rod and construction method thereof for reinforcing weak surrounding rock

Abstract

The invention provides a steel wire bundle anchor rod and a construction method thereof for reinforcing a weak surrounding rock. The anchor rod comprises an anchor head and a rod body, wherein the front end of the rod body extends into a drill hole of the surrounding rock; the tail end of the rod body is connected with the anchor head; the rod body comprises an anchoring section and a free section; the anchoring section comprises a plurality of anchoring nodes connected sequentially; each anchoring node comprises a rigid wire supporting device, bundle nodes and a plurality of steel wire bundles; after the plurality of steel wire bundles penetrate through the rigid wire supporting device, two ends of each steel wire are fastened by the bundle nodes; the free section comprises a plurality of free nodes connected sequentially; each free node comprises an elastic wire supporting device, bundle nodes and a plurality of steel wire bundles; after the plurality of steel wire bundles penetrate through the elastic wire supporting device, two ends of each steel wire are fastened by the bundle nodes; and tail ends of the anchoring nodes are connected with front ends of the free nodes, and tail ends of the free nodes are connected with the anchoring head. In a working process of the anchor rod, a soft rock is greatly deformed to enable the rod body of the anchor rod to extrude the elastic wire supporting device, thereby increasing the length of the anchor rod, releasing the stress of the surrounding rock, and completing a reinforcing task of the weak surrounding rock.

Description

technical field [0001] The invention relates to an anchor rod used in the field of geotechnical engineering reinforcement, in particular to a steel wire anchor rod for strengthening weak surrounding rocks and a construction method thereof. Background technique [0002] In tunnel engineering, foundation pit engineering, water conservancy and hydropower engineering and other engineering and technical fields, the use of bolts to reinforce surrounding rock is a frequently used method. With the increase of the excavation depth of underground engineering, the geological conditions faced by bolt reinforcement are becoming more and more complex. For example, the deep surrounding rock roadway is prone to large deformation of weak surrounding rock, causing the bolt to be pulled out or broken. Cause surrounding rock reinforcement failure. Weak surrounding rocks generally refer to loose, loose, soft and weak rock formations with low strength, high porosity, poor cementation degree, sig...

AI Technical Summary

Problems solved by technology

The above-mentioned large-deformation bolt meets the requirements of large-deformation of the surrounding rock to a certain extent, but there are also disadvantages such as complex structure, insufficient resistance, high installation and use costs, etc.

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