摘要
运用统一强度理论,推导了在平面应变状态下的极限应力状态平衡方程,并将其引入Rankine土压力理论并加以改进,提出了基于统一强度理论的主、被动土压力系数及土压力公式。得出基于Mohr-Coulomb强度理论的Rankine土压力公式是该公式的特例。运用工程实例,计算了在不同权系数b值下的土压力沿深度分布曲线,论证了中间主应力σ2对土压力的影响。实例证明考虑中间主应力σ2的土压力计算结果更符合实际情况。
Based on the unified strength theory,the ultimate equilibrium stress equation under plane strain state is deduced and introduced into the Rankine earth pressure theory.Then the coefficients of active and passive earth pressure and the calculation formulas of earth pressure based on the unified strength theory are proposed.It is shown that the formula of Rankine earth pressure based on the Mohr-Coulomb strength theory is a particular case of the presented formulas.The earth pressure along the depth in a practical project is calculated with different weight coefficients which reflect the influence of intermediate principal stress,and the results prove that calculation results of earth pressure considering intermediate principal stress are closer to the practical situation than those without considering intermediate principal stress.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第z1期4315-4318,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(50379043)
中国科学院武汉岩土力学研究所岩土力学重点实验室开放课题基金(Z110302)资助项目。
关键词
土力学
统一强度理论
极限平衡方程
Rankine土压力理论
中间主应力
soil mechanics,unified strength theory,limit equilibrium equation,Rankine earth pressure theory,intermediate principal stress
作者简介
应捷,男,1973年生,现为博士研究生,主要从事深基坑支护及边坡稳定分析方面的研究工作.E-mail:yingjienn@163.com.
