THE ZONAL DISINTEGRATION MECHANISM OF SURROUNDING ROCK AROUND DEEP SPHERICAL TUNNELS UNDER HYDROSTATIC PRESSURE CONDITION: A NON-EUCLIDEAN CONTINUUM DAMAGE MODEL  

作　　者：Xiaoping Zhou Qinghong Hou Qihu Qian Yongxing Zhang 

机构地区：[1]School of Civil Engineering, Chongqing University [2]Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University [3]Engineering Institute of Engineering Corps, PLA University of Science and Technology

出　　处：《Acta Mechanica Solida Sinica》2013年第4期373-387,共15页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51279218,51021001 and 51078371);Natural Science Foundation Project of CQ CSTC(No.CSTC,2009BA4046);the Fundamental Research Funds forthe Central Universities(No.CDJZR10205501)

摘　　要：A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the total elastic stress field distributions.The elastic stress fields of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition axe obtained.If the elastic stresses of the surrounding rocks satisfy the strength criterion of the deep rock masses,the number,size and location of fractured and nonfractured zones are determined.The effect of physico-mechanical parameters of the surrounding rocks on the zonal disintegration phenomenon is studied and numerical computation is carried out.It is found from numerical results that the number,size and location of fractured and non-fractured zones are sensitive to the physico-mechanical parameters of the surrounding rocks.A new non-Euclidean continuum damage model is proposed to investigate the zonal disintegration phenomenon of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition as well as the total elastic stress field distributions.The elastic stress fields of the surrounding rocks around deep spherical tunnels under hydrostatic pressure condition axe obtained.If the elastic stresses of the surrounding rocks satisfy the strength criterion of the deep rock masses,the number,size and location of fractured and nonfractured zones are determined.The effect of physico-mechanical parameters of the surrounding rocks on the zonal disintegration phenomenon is studied and numerical computation is carried out.It is found from numerical results that the number,size and location of fractured and non-fractured zones are sensitive to the physico-mechanical parameters of the surrounding rocks.

关 键 词：a new non-Euclidean continuum damage model the zonal disintegration phenomenon deep spherical tunnels hydrostatic pressure condition fractured and nonfractured zones the strength criterion of the deep rock masses 

分 类 号：TD311[矿业工程—矿井建设]