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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 12    December 2016

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Collapse mechanism of deep tunnels with three-centered arch cross section
LI Yong-xin(李永鑫), YAO Cong(姚聪)

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

Abstract:The possible collapse of different circumstances is derived with the help of the limit analysis theory. Analytical equations related to collapsing mechanisms in deep tunnel with smooth three-centered arc cross sections are derived on the basis of Hoek-Brown failure criterion and upper bound limit analysis. The pore water pressure is considered in the analysis, as a work rate of external force. Numerical results about the shape of detaching curve and the weight of collapsing block per unit length corresponding to different parameters are obtained with the help of mathematical software. The shapes of collapsing block are drawn with respected to different parameters. Furthermore, the effects of different parameters on the shape of detaching curve and the weight of the collapsing block are discussed.

 

Key words: deep-buried tunnel; collapse mechanism; Hoek-Brown criterion; limit analysis

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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