江苏大学学报（自然科学版）2012，Vol.33Issue(5)：601-605,5.DOI:10.3969/j.issn.1671-7775.2012.05.021
共面断续节理岩体直剪强度特性模型
Direct shear strength model of rock mass with coplanar intermittent joints
摘要
Abstract
According to theoretical analysis and model test, the direct shear strength behavior of rock mass with coplanar close intermittent joints was investigated. Through introducing deformation compatibility equation at normal direction, the direct shear strength formulation was deduced based on the Mohr-Coulomb theory. According to the complete stress strain curve obtained from model tests, there are five typical stages in the failure process with linear elastic increment, slippage of the joints, steady development of post-cracking, the coalescence failure of discontinuous joints and the residual strength. The peak and residual strength are increased by the increase of normal stress with poor relationship between deformation property and normal stress. The peak strength decreases with the increase of the joint connectivity rate, and the drop velocity is slow at low connectivity rate. The joint distribution has influence on the strength of rock mass, and the strength of model with joints on edge is bigger than that of the model with joints in the middle. The theoretical calculation results are in good consistency with experimental results to give good description of the direct shear strength of rock mass with coplanar intermittent joints.关键词
工程岩体/断续节理/直剪强度/岩体力学/全应力-应变曲线Key words
engineering rock mass/intermittent joint/direct shear strength/rock mass mechanics/complete stress strain curve分类
建筑与水利引用本文复制引用
胡波,王思敬,刘晓丽..共面断续节理岩体直剪强度特性模型[J].江苏大学学报（自然科学版）,2012,33(5):601-605,5.基金项目
江苏省自然科学基金资助项目(BK2009479) （BK2009479）
江苏省博士后科研资助计划项目(1101049C) （1101049C）
人保部留学人员科技活动项目(2009003) （2009003）
江苏省企业博士聚集计划项目(2011-33) （2011-33）
