Self-adaptive anti-shearing large-deformation anchor rod

Abstract

The invention discloses a self-adaptive anti-shearing large-deformation anchor rod. The self-adaptive anti-shearing large-deformation anchor rod comprises a free section, an anti-shearing large-deformation section and an anchoring section. The anti-shearing large-deformation section is composed of an anchoring end connecting rod, a free end connecting rod and a sleeve. The front end of the anchoring end connecting rod is connected with the threaded end of the sleeve, and the rear end of the anchoring end connecting rod is hinged to the front end of the anchoring section through a fork-shaped connector. One end of the free end connecting rod is inserted into the section, with clamping teeth, of the sleeve, a plurality of steel balls are arranged at the rearmost part of the clamping teeth in the circumferential direction of the free end connecting rod, a bolt is arranged on the end part of the free end connecting rod, and the bolt blocks the steel balls and extrudes the steel balls to cut the clamping teeth to provide resistance to adapt to large deformation; and the other end of the free end connecting rod is hinged to the rear end of the free section through the fork-shaped connector. According to the self-adaptive anti-shearing large-deformation anchor rod, the anti-shearing large-deformation section is connected with the free section and the anchoring section in a hinged mode, so that shearing force is converted into axial force, the anti-deformation and anti-shearing performance can be improved, and constant resistance can be provided by cutting the clamping teeth in the sleeve through the steel balls.

Description

technical field [0001] The invention relates to a bolt used in slope engineering, tunnel engineering and mining engineering, in particular to a self-adaptive anti-shearing large deformation bolt. Background technique [0002] Since the 21st century, the global climate has changed drastically, and extreme weather has occurred frequently, leading to a sharp increase in geological disasters. Landslides have attracted widespread attention because of their high hazards and the widest distribution. The huge losses and impacts caused by landslide disasters have attracted great attention from the state and widespread concern from the society. Effective prevention and control of landslides and scientific evaluation are urgent needs to ensure the safety of social economy and people's lives and properties. Anchorage technology has been widely used in slope engineering, tunnel engineering, and mining engineering in the world because of its initiative, safety, and economy. However, the t...

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Problems solved by technology

[0005] At present, the anti-shear large deformation bolt structure provided by scholars improves the bolt from the aspects of material and structure, but it does not change the state of the bolt itself under the shear force. After a certain deformation of the bolt, it is prone to shear shear damage, some have higher requirements on the elastic properties of materials

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