A liquid-expanding yielding pressure, earthquake and high ground temperature bolt

Abstract

The invention discloses a liquid-expansion type yielding anti-seismic high-ground-temperature-resistant anchor bolt which comprises a bolt body, a pressing-bearing one-way valve, oil passing holes, a sleeve, a sliding stopper, an anchoring agent layer, a slurry-blocking retainer, a hydraulic oil layer, a drill hole wall, an expansion pipe, centering devices, a bearing plate, a round-head-shaped spacer and a nut. The anchor bolt combines a yielding anchor bolt with a friction anchor bolt, and is large in ultimate elongation, strong and reliable in anchoring force, wide in application range, capable of realizing flexible yielding and well resisting impact load and excellent in anti-seismic property, and adverse impact of high ground temperature on the anchor bolt is reduced effectively; no interference and adverse impact are caused to secondary lining construction of underground engineering and sash grider construction of ground slope engineering; the anchor bolt is high in capacity of compatible deformation, good in yielding, anti-seismic and high in resistance to high ground temperature, service cycle of the anchor bolt is prolonged, and maintenance cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering anchoring and support, and in particular relates to a liquid-expansion yielding pressure, earthquake and high ground temperature anchor rod. Background technique [0002] Anchor bolt is a main support technology in underground engineering, mining engineering, foundation pit and slope engineering involved in geotechnical engineering. It has a wide range of applications and good reinforcement effect. However, with the increase of underground engineering, the buried depth of underground engineering is getting bigger and bigger, the geological conditions are becoming more and more complex, and new problems are constantly emerging, such as high ground stress, high ground temperature, large deformation of soft rock, rockburst and high earthquake Intensity, etc., these new problems put forward new requirements for the application of anchor rods. [0003] The traditional bolt has defects...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a liquid-expansion yielding pressure, earthquake and high ground temperature anchor, which aims to solve the problem that the existing yielding anchor has poor reinforcement effect, and the anchor is easy to break, which affects two Sub-lining construction is not conducive to the utilization of roadway section space, poor stability and reliability

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