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A slow-release, resistance-increasing, pressure-yielding bolt and method

A technology of yielding bolts and slow release, which is applied in the installation of bolts, earthwork drilling, construction, etc., and can solve the problems that are not conducive to the stability of the overall structure, and the impact and disturbance of the bolt-rock complex

Active Publication Date: 2021-02-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the instantaneous release of the energy accumulated by the deformation of the bolt during the shearing process, the limit bolt will cause impact and disturbance to the bolt-rock complex, which is not conducive to the stability of the overall structure

Method used

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  • A slow-release, resistance-increasing, pressure-yielding bolt and method
  • A slow-release, resistance-increasing, pressure-yielding bolt and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A slow-release and resistance-increasing pressure bolt comprises a sleeve 1, wherein the sleeve 1 has an inner cavity along the direction of its own axis, and one end of the sleeve 1 is blocked; A shaft rod 2 is passed through, one end of the shaft rod 2 extends into the inner cavity of the sleeve 1 , and the other end is provided with a connecting piece for connecting the rock wall.

[0027] The inner cavity of the sleeve 1 is provided with a gas chamber 3, and the set position of the shaft rod 2 is provided with a piston, so that the gas chamber 3, the shaft rod 2 and the piston are enclosed to form a closed gas space; Compressed gas can be injected into the gas space, and the compressed gas is used to provide resistance when the shaft rod 2 slides away from the sleeve 1 . The piston can slide along the axial direction of the shaft rod 2 to realize the compression or expansion of the gas in the compression space.

[0028] In this embodiment, in order to realize the i...

Embodiment 2

[0040] The present embodiment provides a method for using a slow-release, resistance-increasing, and pressure-resisting anchor, including the following steps:

[0041] Use commercial drilling equipment to drill holes on the surface of the rock and soil, the depth of the hole is the same as the length of the sleeve 1, carefully clear the hole and install the anchoring agent in the anchor hole;

[0042] Insert the rod structure composed of sleeve 1, shaft 2 and rubber gasket 6 into the anchor hole, the closed end of sleeve 1 faces into the hole, the open end of sleeve 1 is flush with the rock and soil surface, and the shaft rod 2 part of the length is exposed outside the rock and soil surface;

[0043] Set the anchor plate 4 on the exposed section of the shaft rod 2, with the convex side facing the outside of the rock mass;

[0044] Install the bolt 5 at the top of the shaft 2 and tighten it, and press the anchor plate 4 to the surface of the rock and soil mass.

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Abstract

The invention relates to a slow-release, increasing-resistance and pressure-releasing anchor rod and a method thereof, comprising a sleeve, the sleeve has an inner cavity along its own axis direction, one end of the sleeve is blocked; the inner cavity of the sleeve A shaft is provided in the middle, and one end of the shaft extends into the inner cavity of the sleeve, and a connecting piece is installed at the other end, and the connecting piece is used for connecting the rock wall. The inner cavity of the sleeve is provided with a gas chamber, and the set position of the shaft is provided with a piston, so that the gas chamber, the shaft, and the piston are enclosed to form a closed gas space; the gas space can Compressed gas is injected to provide resistance as the shaft slides away from the sleeve. The piston can slide along the axial direction of the shaft to realize the compression or expansion of the gas in the compression space.

Description

technical field [0001] The invention belongs to the technical field of civil engineering construction, and in particular relates to a slow-release, resistance-increasing, and yield-pressure anchor and a method. Background technique [0002] The 21st century is the century of underground space development and utilization. With the vigorous development of infrastructure construction such as transportation, energy, and water conservancy in my country, underground engineering construction represented by tunnels, underground workshops, and underground complexes has entered a period of rapid development. Soft rock is a common type of rock mass in engineering construction. Due to its large deformation and long deformation period, it often causes slippage or tensile failure of the anchoring structure. [0003] The inventors learned that the industry has developed various types of pressure-relief bolt structures, but most of them use mechanical structures such as single or multiple l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E21D20/00E02D5/74
CPCE02D5/74E21D20/003E21D21/0026E21D21/0033E21D21/0093
Inventor 李利平周申孙法合李术才刘洪亮王凯陈迪杨张延欢胡杰秦承帅
Owner SHANDONG UNIV
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