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Supporting and anchoring integrated resistance-limiting energy-consuming large-deformation tunnel primary supporting structure and construction method

A technology of initial support and large deformation, used in tunnels, tunnel lining, installation of bolts, etc., can solve problems such as support rupture, achieve good stability and safety, ensure stability and safety, and widely practicable Effect

Inactive Publication Date: 2021-01-29
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Realize the combination of support resistance damper and bolt support, intend to solve the problems of construction excavation and support caused by high ground stress, weak surrounding rock and other adverse geology, and solve the actual situation that the initial support of the tunnel is broken due to force due to large deformation construction problems

Method used

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  • Supporting and anchoring integrated resistance-limiting energy-consuming large-deformation tunnel primary supporting structure and construction method
  • Supporting and anchoring integrated resistance-limiting energy-consuming large-deformation tunnel primary supporting structure and construction method

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Embodiment Construction

[0036] The following examples illustrate the technical solution of the present invention in detail. The following implementations are only exemplary, and can only be used to explain and illustrate the technical solution of the invention, rather than be construed as a limitation of the technical solution of the present invention.

[0037] When excavating tunnels under complex geological conditions (such as weak surrounding rocks and broken surrounding rock strata), collapse of the tunnel face and large deformation of the initial structure are likely to occur. In order to solve the above problems, we often consider the problem from the aspects of improving the strength of the supporting structure. However, in fact, the pressure and deformation of the surrounding rock are often very large, and the problem cannot be solved fundamentally only by changing the support strength and support parameters. From the perspective of allowing the structure to deform, we will use the performanc...

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Abstract

The invention discloses a supporting and anchoring integrated resistance-limiting energy-consuming large-deformation tunnel primary supporting structure, and belongs to the field of tunnel construction. The primary supporting structure is composed of a steel grating and an anchor rod and damper integrated structure; the anchor rod and damper integrated structure comprises a resistance limiting steel plate and an anchor rod support; a damper is composed of an upper connecting plate, a lower connecting plate, stiffening ribs and the resistance limiting steel plate; an anchoring hole is reservedin the center of the resistance limiting steel plate; and the resistance limiting steel plate is arranged between the two connecting plates and is parallel to surrounding rock. The primary supportingstructure achieves active and passive combined supporting of a deeply-buried soft rock large-deformation tunnel, allows the generation of certain deformation amount of the surrounding rock, and releases radial and circumferential stress of the surrounding rock of the tunnel.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to an initial support structure and construction method for an integrated support-anchor that provides active and passive support for resistance-limiting, energy-consuming, and large-deformation tunnels. Background technique [0002] With the vigorous development of infrastructure in our country, my country's tunnel construction is in a period of rapid development, and more and more new tunnels need to pass through complex geology, which involves a lot of surrounding rock stability issues. The tunnel passes through complex geological conditions such as high stress or extremely high stress of the original rock, broken surrounding rock, and low compressive strength. The self-stabilizing ability of the surrounding rock is poor or basically has no self-stabilizing ability during excavation. Larger and last longer, the continuous large deformation of the surrounding rock leads to the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/14E21D11/15E21D11/18E21D20/02E21D11/10
CPCE21D11/14E21D11/152E21D11/18E21D20/021E21D11/10
Inventor 宋洋李昂王贺平李永启范波马旭琪王宏帅
Owner LIAONING TECHNICAL UNIVERSITY
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