岩土力学2013，Vol.34Issue(2)：404-410,7.
考虑硬化软化和剪胀特性的绿泥石片岩力学模型
Mechanical model of chlorite schist considering hardening-softening and dilatancy characteristics
摘要
Abstract
Chlorite schist is a kind of soft rocks, and its large deformation and collapse due to excavation are greatly harmful to engineering safely. In order to investigate the mechanical property of chlorite schist, triaxial compression test is conducted and a new internal variable is defined considering the influence of stress state on plasticity evolution. According to test results, evolution characteristics of cohesion and friction angle are that the cohesion decreases firstly approximately linearly and then parabolically, but friction angle always decreases approximately parabolically. Meanwhile, based on test data, evolution of dilatancy angle is opposite to that of friction angle. Finally, mechanical model of chlorite schist is proposed considering hardening-softening and dilatancy characteristics; and then it is applied to simulate the triaxial test; the result shows a good agreement with the test data. Effort of this paper offers a rational mechanical model for engineering safety estimation and an important reference for the mechanical investigation of other similar soft rocks.关键词
绿泥石片岩/应变硬化软化/剪胀/力学模型/广义正交流动法则Key words
chlorite schist/ strain-hardening and softening/ dilatancy characteristics/ mechanical model/ generalized normality rule分类
建筑与水利引用本文复制引用
李震,周辉,宋雨泽,张传庆,胡其志..考虑硬化软化和剪胀特性的绿泥石片岩力学模型[J].岩土力学,2013,34(2):404-410,7.基金项目
国家重点基础研究发展计划(973)项目(No.2010CB732006) （973）
国家自然科学基金(No.50979104,No.41172288) （No.50979104,No.41172288）
中国科学院知识创新工程重要方向项目(No.KZCX2-EW-QN115). （No.KZCX2-EW-QN115）
