摘要
在对非饱和土边坡进行稳定分析时,应该全面地考虑基质吸力对边坡稳定的贡献。首先,分别探讨了基于Fredlund非饱和土强度表达式和Bishop非饱和土有效应力强度公式将强度折减有限元法推广到非饱和土边坡稳定分析中的具体方法;然后,开发了可以考虑基质吸力两种处理方法的强度折减有限元计算程序;最后,给出了一个非饱和土边坡稳定分析的对比算例,说明了二者的不同特点。
The contribution of matric suction to the stability of unsaturated soil slope should be properly evaluated in order to meet the demand of practice. Firstly, Bishop＇s and Fredlund＇s strength equations for unsaturated soil are discussed, respectively. Then the strength equations expressed in three-dimensional effective stress space are applied to the strength reduction finite element method and the treatments of the matric suction are discussed. Finally, the FEM codes are implemented and a case of unsaturated soil slope stability is analyzed.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第10期2060-2064,共5页
Rock and Soil Mechanics
基金
国家自然科学基金与长江水利委员会联合资助项目(No.50099620)
关键词
非饱和上
基质吸力
边坡
稳定性
强度折减有限元法
unsaturated soil
matric suction
slope
stability
strength reduction finite element method
作者简介
李荣建，男，1969年生，博士研究生，主要从事岩土数值分析与计算、边坡及加固的稳定分析研究工作。E-mail：lrj03@mails.tsinghua.edu.cn
