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Rod body piston resistance-increase yielding anchor rod and construction method

A technology for yielding anchor rods and rod bodies, which is applied in the installation of anchor rods, earthwork drilling, mining equipment, etc. It can solve the problems of easy jamming of resistance-increasing structures, failure to achieve yielding effect, lack of solutions, etc., and achieve guaranteed strength , material saving, high adhesion effect

Pending Publication Date: 2018-10-19
SHANDONG UNIV
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Problems solved by technology

At present, the pressure relief device on the market is generally reflected on the rod body. This method not only needs to add an additional pressure relief device, but also cannot achieve a good pressure relief effect.
[0003] To sum up, in the prior art, there is still no effective solution to the problem that the resistance-increasing structure of the bolt is easily blocked

Method used

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  • Rod body piston resistance-increase yielding anchor rod and construction method
  • Rod body piston resistance-increase yielding anchor rod and construction method
  • Rod body piston resistance-increase yielding anchor rod and construction method

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Embodiment Construction

[0029] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0031] As introduced in the background art, there is a problem in the prior art that the resistance-increasing s...

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Abstract

The invention discloses a rod body piston resistance-increase yielding anchor rod and a construction method. The problem is solved that a resistance-increase structure of an anchor rod is easily blocked. By arranging a sleeve outside an anchor rod body and changing the thickness of the wall of the sleeve, the thickness of the wall of the sleeve gradually changes, and accordingly a yielding effectis realized. In the technical scheme, the anchor rod comprises the sleeve, the sleeve is of a hollow structure, and sleeves the rod body, the end, serving as an anchoring segment, of the rod body extends into the tail end of the sleeve and is connected with a resistance-increase structure, and the other end of the rod body extends to the outer side of the head end of the sleeve and is connected with an anchor head. The thickness of the wall of the part, corresponding to the anchoring segment of the rod body, of the sleeve is gradually decreased from head end to tail end, and when the anchor rod gradually pushes a soil body forwards, the wall of the sleeve deforms and is lengthened to realize yielding.

Description

technical field [0001] The invention relates to the technical field of roadway or tunnel support, in particular to a rod body piston increasing resistance and yielding pressure bolt and a construction method. Background technique [0002] With the development of deep underground engineering, the depth of engineering excavation continues to increase, resulting in increased surrounding rock stress and large deformation of rock mass, which have become a major threat to the safe construction of underground engineering. In order to solve this problem, there are increasing resistance and yielding anchor rods on the market. In the process of increasing resistance, in order to achieve the effect of increasing resistance, resistance-increasing blocks are often used. However, in the process of construction, traditional resistance-increasing blocks will get stuck on the sleeve wall when the anchor does not reach the maximum resistance. problem in the middle section. How to improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00
CPCE21D21/0033E21D21/0053
Inventor 李海燕刘洁胥洪彬常涛唐鹏越
Owner SHANDONG UNIV
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