OPTIMIZATION RESEARCH ON TUNNEL CROSSING SCHEME THROUGH ULTRA-SHALLOW AND LARGE-BIAS SECTIONS BASED ON ECONOMIC SAFETY COEFFICIENT RATIO

Zhong Zuliang; Liu Xinrong; Fang Jinbing; Li Xiaoyong; Liao Jingwei

doi:10.13204/j.gyjz201302016

Volume 43 Issue 2

Dec. 2014

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Citation:

Zhong Zuliang, Liu Xinrong, Fang Jinbing, Li Xiaoyong, Liao Jingwei. OPTIMIZATION RESEARCH ON TUNNEL CROSSING SCHEME THROUGH ULTRA-SHALLOW AND LARGE-BIAS SECTIONS BASED ON ECONOMIC SAFETY COEFFICIENT RATIO[J]. INDUSTRIAL CONSTRUCTION, 2013, 43(2): 78-82,171. doi: 10.13204/j.gyjz201302016

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OPTIMIZATION RESEARCH ON TUNNEL CROSSING SCHEME THROUGH ULTRA-SHALLOW AND LARGE-BIAS SECTIONS BASED ON ECONOMIC SAFETY COEFFICIENT RATIO

doi: 10.13204/j.gyjz201302016

1.
1. Civil Engineering College of Chongqing University,Chongqing 400045,China;
2.
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area(Chongqing University),Ministry of Education,Chongqing 400045,China

Received Date: 2012-05-28
Publish Date: 2013-02-20

Abstract

Abstract

There are many gullies in the loess plateau region.A most unfavorable topographic condition occured when tunnels passed through the gully region.It meaned that tunnels needed to pass through the ultra-shallow and large-bias sections.In order to obtain the economic and safe crossing scheme,the conception of economic safety coefficient ratio and its calculation principle was brought forward.Firstly,the tunnel crossing schemes through ultra-shallow and large-bias sections were designed.The economic safety coefficient ratio of each tunnel crossing scheme was calculated by the methods of strength reduction method and related quotas.Besides,the tunnel's rock stress,deformations and the primary support's stress were simulated and compared among the three tunnel crossing schemes.Finally,the counterweight fill method was considered to be the best crossing scheme,with which the ultra-shallow and large-bias tunnel was in the steady state during the construction period.Good results were achieved so as to offer reference for the future similar projects.
- tunnel,
- ultra-shallow and large-bias section,
- crossing scheme,
- economic safety coefficient ratio

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References

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