Influences of anisotropy and inhomogeneity on supporting pressure of tunnel face with kinematical approach
来源期刊：中南大学学报(英文版)2015年第9期
论文作者：YANG Xiao-li LI Wen-tao PAN Qiu-jing
文章页码：3536 - 3543
Key words：tunnel face; supporting forces; anisotropy; inhomogeneity; upper bound theorem
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.
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
