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Anti-breakage anchor rod

A bolt and tail rod technology, which is applied in the installation of bolts, construction, mining equipment, etc., can solve the problems of bolt shear damage, failure, engineering loss, etc., and achieve the effect of buffering, governance and effective effect

Active Publication Date: 2016-07-06
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in actual engineering, there are many deficiencies in the bolt support technology: the common failure forms of the bolt include the damage caused by the insufficient tensile bearing capacity of the bolt, the shearing of the bolt at the sliding surface or the joint surface damage and rock damage
Due to the low elongation of the anchor bar itself, it may be broken if a small deformation occurs under the ultimate stress, and once the anchor is broken, the entire anchor support system will fail, which will bring serious problems to the project. unpredictable loss
More serious cases may cause major casualties, affect the safe production of coal mines, or the normal construction of other projects

Method used

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  • Anti-breakage anchor rod

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Embodiment Construction

[0011] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0012] Such as figure 1 Shown, the present invention comprises anchor rod 7, and the end of anchor rod tail rod 1 has nut 2 and the steel plate tray 3 that is close to surrounding rock wall, and nut 2 presses down steel plate tray 3, and the middle section of anchor rod 7 is anchor rod The steel bar 4 of the free section is covered with a sleeve 5 with built-in thread on the steel bar 4 of the free section of the anchor rod.

[0013] Such as figure 1 As shown, an outer sleeve 6 is sheathed on the periphery of the sleeve 5, and the outer sleeve 6 and the steel bar 4 of the free section of the anchor rod are connected and fixed through a welding zone 8. The main functions of the outer sleeve 6 are as follows: 1. When the anchor rod steel bar is not broken, there is cohesive force between the outer sleeve 6 and the grouting body, and this cohesive force can sh...

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Abstract

The invention discloses an anti-breakage anchor rod. By the adoption of the anti-breakage anchor rod, the problem that an anchor rod fails immediately due to the fact that an anchor rod free section steel bar is broken is solved. The anti-breakage anchor rod comprises an anchor rod body (7). A nut (2) and a steel plate tray (3) tightly attached to the wall of surrounding rock are arranged at the end of an anchor rod tail bar (1). The steel plate tray (3) is pressed by the nut (2). An anchor rod free section steel bar (4) is arranged on the middle section of the anchor rod body (7), and a sleeve (5) connected to the anchor rod free section steel bar (4) in a sleeving mode through threads is arranged on the anchor rod free section steel bar (4). The anti-breakage anchor rod has the advantage that the supporting capacity of the anchor rod can be maintained under the condition that the anchor rod free section steel bar is broken due to the fact that the anchor rod bears the ultimate tension.

Description

technical field [0001] The invention belongs to protection facilities of civil engineering, and in particular relates to an anchor rod, which is applied to disaster protection of tunnels and roadways, or applied to projects such as side slope support. Background technique [0002] The anchoring technology in geotechnical engineering is to use anchor rods or anchor cables to reinforce the rock mass. It fully exerts the stability of the rock and soil mass itself. It is a kind of small disturbance to the original rock, fast construction speed, safe and reliable. Cost-effective reinforcement technology. The bolt can actively strengthen the rock and soil mass, effectively control its deformation, and prevent the collapse and damage of the rock and soil mass. The many advantages of the bolt support technology have made the bolt support technology the main support method in the field of geotechnical engineering. [0003] However, in actual engineering, there are many deficiencies ...

Claims

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Application Information

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IPC IPC(8): E21D21/00E02D5/74
CPCE02D5/74E21D21/0013E21D21/0033
Inventor 周伦仕周小平程浩
Owner CHONGQING UNIV
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