A detachable recoverable anchor rod and its construction method

Abstract

The invention relates to the technical field of anchor rods, in particular to a detachable recoverable anchor rod and a construction method thereof. Including drill bit section, drill pipe section and zipper expansion fixing device, the drill bit section and drill pipe section can be spliced ​​with each other through the zipper expansion fixing device, or can be spliced ​​separately through the zipper expansion fixing device, suitable for construction at different depths; longer When the anchor is fixed, the steel wire rope is inserted inside, and the drill bit is fixed at the head end. After drilling into the anchor, the locking rod at the splicing position can be opened by turning the sleeve at the end, and the anchor is fixed at multiple positions, so that the anchor The fixing is more firm. When recovering, turn the sleeve in the opposite direction, pull the anchor rod outward, and the locking rod will automatically retract, and the anchor rod can be easily pulled out. The recovery is simple and the recovery rate of the anchor rod is high; when the short anchor rod is fixed, the internal feed screw rod , The anchor rod can be fixed by turning the end nut, and the anchor rod can be easily pulled out by loosening the nut and pulling the anchor rod outward.

Description

technical field [0001] The invention relates to the technical field of anchor rods, in particular to a detachable recoverable anchor rod and a construction method thereof. Background technique [0002] Due to the relatively dense roads, buildings, pipelines and other facilities in the urban area, the impact of foundation pit support on the surrounding environment continues to expand. Construction and long-term urban planning may all have an impact. In response to the above problems, recyclable anchor rods have become a new technology to solve this problem. [0003] The existing technologies mainly include hot-melt recyclable anchor rods, main reinforcement detachable high-pressure rotary jet grouting anchor rods, engineering plastic recyclable anchor rods, slurry bladder recyclable anchor rods and hollow plate airbag recyclable anchor rods; their working principles are The anchor rod is fixed by expansion at the anchor head, the fixed end surface of the anchor rod is relat...

AI Technical Summary

Problems solved by technology

[0003] The existing technologies mainly include hot-melt recyclable anchor rods, main reinforcement detachable high-pressure rotary jet grouting anchor rods, engineering plastic recyclable anchor rods, slurry bladder recyclable anchor rods and hollow plate airbag recyclable anchor rods; their working principles are The anchor rod is fixed by expanding at the anchor head, the fixed end surface of the anchor rod is relatively single, and the fixing strength is low

[0004] The recyclable bolts in the prior art are not completely recyclable. After the recovery, the head components remain in the rock and soil body, the recovery rate is low, and the bolts are easily scrapped after being pulled out; most of the recyclable bolts are still Grouting maintenance is required, and the construction period is long; the bolt device is complicated, the reliability is difficult to guarantee, and the stress concentration of the bearing body is obvious

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