【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。更多还原

【Abstract】 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.更多还原