Tunnel supporting structure used for large deformation stratum and construction method of tunnel supporting structure

A support structure and large deformation technology, applied in tunnels, tunnel linings, underground chambers, etc., to solve support problems and ensure stability and safety

Active Publication Date: 2014-01-22
SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a tunnel support structure and its construction method for large deformation strata, which can effectively solve the support problem of large deformation sections, and ensure the stability and safety of the tunnel during operation

Method used

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  • Tunnel supporting structure used for large deformation stratum and construction method of tunnel supporting structure

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032]The tunnel support structure used in large deformation formations includes the vault 11 at the top, the inverted arch 12 at the bottom and the side walls 13 along the tunnel ring direction, and includes the initial support 21 of the outer layer and the initial support of the inner layer along the radial direction of the tunnel. The secondary lining 23 and the waterproof layer 22 between the primary support 21 and the secondary lining 23, the primary support 21 adopts a sprayed anchor structure that contains steel mesh and steel arches; the primary support 21 and the The inner primary support 22 is arranged between the secondary lining 23, and the waterproof layer 24 is located between the inner primary support 22 and the secondary lining 23. The inner primary support 22 is made of steel mesh and steel arch frame of shotcrete structure.

[0033] S...

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Abstract

The invention relates to a tunnel supporting structure and a construction method of the tunnel supporting structure, and provides a tunnel supporting structure used for a large deformation stratum. An inner-layer primary support is arranged between a primary support and a secondary lining of the tunnel supporting structure. The construction method includes the steps that when deformation of the primary support reaches variable deformation, the inner-layer primary support is constructed, otherwise, the inner-layer primary support is not constructed, and the secondary lining is constructed according to the practical inner outline of the primary support or the inner-layer primary support. The primary support and the inner-layer primary support are matched, supporting to surrounding rock is initially flexible and then rigid and is initially released and then resisted, active adaptation to deformation of the surrounding rock is achieved, permanent supporting to the surrounding rock is achieved through a strong support formed by the primary support, the inner-layer primary support and the secondary lining, accordingly, the aim of supporting the large deformation stratum can be effectively achieved, and the stability and the safety performance during the running period of a tunnel can be guaranteed.

Description

technical field [0001] The invention relates to a tunnel support structure and a construction method thereof, in particular to a tunnel support structure and a construction method used in large deformation strata. Background technique [0002] A tunnel is an engineering structure built underground and is widely used in fields such as transportation, mining, water conservancy, and national defense. The current tunnel is usually constructed using the new Austrian method, and the support structure is a composite lining structure, including the vault, invert and side walls on both sides along the tunnel ring direction, including the outer primary support and the inner secondary support along the tunnel radial direction. Secondary lining and waterproofing layer between primary support and secondary lining. [0003] The core of the new Austrian method of construction is to give full play to the self-supporting capacity of the surrounding rock. Furthermore, it is required that P ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/14
Inventor 郑建国李玉文林国进王联郑金龙李晓洪田尚志高世军田志宇丁尧
Owner SICHUAN DEPT OF TRANSPORTATION HIGHWAY PLANNING PROSPECTING & DESIGN RES INST
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