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Large-deformation self-adaptive energy release anchor rod

An adaptive, large-deformation technology, applied in the installation of bolts, construction, excavation, etc., to achieve the effect of releasing energy, good support, and improving early support capacity and failure strength

Pending Publication Date: 2021-01-29
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the existing bolts, the technical problem to be solved by the present invention is to provide a large deformation self-adaptive energy release bolt, which can increase the elongation rate and effectively release the energy generated by the deformation of the surrounding rock to adapt to the surrounding rock of the roadway. In places with large deformation, it has a stable and high-strength initial support force, which greatly improves the failure strength of the bolt

Method used

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0018] In the present application, in order to clearly describe the structural features of the present invention, the orientation words "front" and "rear" are used. The location close to the exit of the surrounding rock.

[0019] like figure 1 and figure 2 As shown, this embodiment includes a rod body 4, and also includes an inner stepped tube 1 sleeved on the rear section of the rod body 4. The tail of the rod body 4 is a wear-resistant magnesium alloy friction head 41; the inner stepped tube 1 has two steps On the surface, the inner stepped tube is divided into small-diameter tube 11, first-stage medium-diameter tube 12 and large-diameter tube 13 from front to back; the outer diameter of wear-resistant magnesium alloy friction head 41 is slightly larger than the inner diameter of medium-diameter tube 12 , the wear-resistant magnesium alloy friction head...

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Abstract

The invention discloses a large-deformation self-adaptive energy release anchor rod. The anchor rod comprises a rod body (4) and an inner stepped pipe barrel (1) arranged on the rear section of the rod body (4) in a sleeving mode, and a abrasion-resistant magnesium alloy friction head (41) is arranged at the tail of the rod body (4); the inner stepped pipe barrel (1) is provided with at least twostages of stepped surfaces, and the inner stepped pipe barrel is sequentially divided into a small-diameter pipe barrel (11), at least one stage of medium-diameter pipe barrel (12) and a large-diameter pipe barrel (13) from front to back; and the outer diameter of the abrasion-resistant magnesium alloy friction head (41) is larger than the inner diameter of any one of the medium-diameter pipe barrels (12), the abrasion-resistant magnesium alloy friction head (41) is pre-arranged in the large-diameter pipe barrel (13) and initially positioned on the rear-stage stepped surface, and the rod body(4) is in transition fit or interference fit with the small-diameter pipe barrel (11). The anchor rod has the technical effects that the elongation rate is increased, energy generated by surrounding rock deformation is effectively released, the early-stage supporting capacity and breaking strength of the anchor rod are greatly improved, a good supporting effect is achieved, and surrounding rock isstabilized for a long time.

Description

technical field [0001] The invention belongs to the protection technology of civil engineering, and in particular relates to an anchor rod, which is applied to tunnel or roadway disaster protection, or side slope support and other projects. Background technique [0002] The anchoring technology in geotechnical engineering is to use anchor rods or anchor cables to reinforce the rock mass. It can give full play to the stability of the rock and soil mass itself. It is a small disturbance to the original rock, fast construction speed, safe, reliable and economical. 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 bolt support has many advantages, so that the bolt support technology has become the main support method in the field of geotechnical engineering. [0003] In actual engineering, there are also many deficiencies in bolt support: the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D21/00E02D17/20E02D5/74
CPCE21D21/0033E02D17/20E02D5/74
Inventor 周小平赵康付梁李铮
Owner CHONGQING UNIV
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