隧洞围岩稳定分析及其设计方法

Hazard Control in Tunnelling and Underground Engineering

2019, Vol. 1

Issue (4): 1-12 DOI:

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Stability analysis and design method of tunnel surrounding rock

ZHENG Yingren¹, WANG Yongfu²

1. Army Logistics University, Chongqing 400041, China;
2. Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China

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Abstract The problems existing in the stability analysis of tunnels and the design concept and method were put forward, and three limit analysis methods were introduced and put forward according to the principle of elastic-plastic mechanics. It is pointed out that the numerical limit method is the only way to solve the tunnel design problem. The reliability of three limit analysis methods and their feasibility in tunnel engineering are illustrated by examples. In order to solve the uncertainty in tunnel stability analysis and to provide more scientific and reasonable mechanical parameters of surrounding rock, it is necessary to do a good job of surrounding rock classification combining theory, investigation and experience. Taking the surrounding rock classification of rail transit tunnels as an example, the level and scientificity of classification were improved including the coordination and optimization of qualitative and quantitative classification, the improvement of strength and integrity index, the compilation of classification table of surrounding rock of interval tunnel and station tunnel, the judgment of self stability ability of surrounding rock and the determination of physical and mechanical parameters of surrounding rock. A classification method with two kinds of tunnel spans is proposed, which provide more scientific and reasonable mechanical parameters and improve the level of quantitative classification method.

Key words： rail transit limit analysis method numerical limit analysis classification of tunnel surrounding rock rock mass basic quality mechanical parameters of surrounding rock

Received: 22 October 2019 Published: 09 March 2020

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ZHENG Yingren,WANG Yongfu. Stability analysis and design method of tunnel surrounding rock[J]. Hazard Control in Tunnelling and Underground Engineering, 2019, 1(4): 1-12.

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http://tunnel.sdujournals.com/EN/ OR http://tunnel.sdujournals.com/EN/Y2019/V1/I4/1

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