Influences of anisotropy and inhomogeneity on supporting pressure of tunnel face with kinematical approach  

作　　者：杨小礼 李闻韬 潘秋景 

机构地区：[1]School of Civil Engineering, Central South University [2]Laboratory 3SR, Grenoble Alpes University

出　　处：《Journal of Central South University》2015年第9期3536-3543,共8页中南大学学报（英文版）

基　　金：Project(2013CB036004) supported by the National Basic Research Program of China;Projects(51178468,51378510) supported by the National Natural Science Foundation of China

摘　　要：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.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.

关 键 词：tunnel face supporting forces ANISOTROPY INHOMOGENEITY upper bound theorem 

分 类 号：U455[建筑科学—桥梁与隧道工程]