An energy-dissipating shock-absorbing bolt and its construction method

Abstract

The invention provides an energy-dissipating shock-absorbing bolt and a construction method thereof. The shock-absorbing bolt includes a bolt system and an energy-dissipating shock-absorbing system; the bolt includes a rod body, an anchor and a backing plate; The front end is anchored on the retaining structure, and the rear end is anchored in the formation through the slurry. The energy consumption damping system includes a hydraulic cylinder, spring, piston, top expansion rod, viscous liquid and orifice; the cylinder is filled with viscous liquid, the top expansion rod is symmetrically distributed on the side walls of the front and rear ends of the hydraulic cylinder, and the spring covers the piston On the rod, the piston is sleeved in the hydraulic cylinder, and the piston rod and the rod body are connected coaxially through the sleeve; under the action of the earthquake, the anchor rod produces repeated tension and compression deformation with the reciprocating force of the earthquake, and the spring, viscous liquid resistance and top expansion rod Additional anchoring force will cause energy loss; after the earthquake, it will automatically reset under the action of compressed liquid and spring; the invention has simple structure, technical feasibility, convenient assembly, easy construction, and good shock absorption, anchoring and long-term service performance.

Description

technical field [0001] The invention belongs to the technical field of geotechnical anchoring engineering, and in particular relates to an energy-consuming shock-absorbing anchor rod and a construction method thereof. Background technique [0002] According to statistics, earthquakes have been frequent in recent years, such as the 8.0-magnitude Wenchuan earthquake on May 12, 2008, six earthquakes occurred in Yushu City, Qinghai Province on April 14, 2010, and the highest magnitude was 7.1, and on August 3, 2014, Yunnan Province A 6.5-magnitude earthquake occurred in Ludian County, Zhaotong City. In 2018 alone, there were 31 earthquakes with a magnitude of 5.0 or more in my country. On September 28, 2018, a 7.4-magnitude earthquake occurred in Palu, Indonesia. These earthquakes caused a large number of casualties, house collapses and landslides, etc., bringing life danger and heavy property losses to the country and people. [0003] Bolt support plays an important role in slo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve the shock absorption performance of the support structure and the safety of the slope in view of the excessive deformation of the support structure and unstable rock and soil caused by the earthquake, and even the instability and collapse, which cannot be self-adjusted. A kind of energy-dissipating shock-absorbing bolt and its construction method

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