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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 1    January 2018

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Safe range analysis of clear distance of twin shallow tunnels based on limit analysis and reliability theory
ZHANG Biao(张标), WANG Xuan(王晅), ZHANG Jia-sheng(张家生), ZHANG Jia-hua(张佳华), CHENG Hao(成浩)

School of Civil Engineering, Central South University, Changsha 410075, China

Abstract:A method of analyzing the stability of twin shallow tunnels was presented using both limit analysis with nonlinear failure criterion and reliability theory. In the condition of nonlinear failure criterion, the critical clear distances of twin shallow tunnels were obtained by analyzing the change of surrounding pressure. A reliability model was established based on limit state equation, and the failure probability was solved by virtue of Monte Carlo method. Safety factor and corresponding clear distance of different safety levels were obtained by introducing a target reliability index. The scope of clear distance for different safety levels is described, which can be used as a supplement and improvement to the design codes of tunnels.

 

Key words: twin shallow tunnels; limit analysis; nonlinear failure criterion; reliability theory; clear distance

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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