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中南大学学报(英文版)

Journal of Central South University

Vol. 22    No. 9    September 2015

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Influences of anisotropy and inhomogeneity on supporting pressure of tunnel face with kinematical approach
YANG Xiao-li(杨小礼)1, LI Wen-tao(李闻韬)1, PAN Qiu-jing(潘秋景)2

1. School of Civil Engineering, Central South University, Changsha 410075, China;
2. Laboratory 3SR, Grenoble Alpes University, CNRS UMR 5521, Grenoble, France

Abstract:Based on the active failure mechanism generated by a spatial discretization technique, the stability of tunnel face was studied. With the help of the spatial discretization technique, not only the anisotropy and inhomogeneity of the cohesion but also the inhomogeneity of the internal friction angle was taken into account in the analysis of the supporting forces. From the perspective of upper bound theorem, the upper bound solutions of supporting pressure were derived. The influence of the anisotropy and heterogeneity on the supporting forces as well as the failure mechanisms was discussed. The results show that the spatial discretization characteristics of cohesion and internal frictional angle impose a significant effect on the supporting pressure, which indicates that above factors should be considered in the actual engineering.

 

Key words: tunnel face; supporting forces; anisotropy; inhomogeneity; upper bound theorem

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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