降雨渗流作用下残积土边坡的数值分析

Numerical analysis on residual soil slope under rainfall infiltration

介绍了某残积土边坡受降雨影响的变形特点及边坡渗流分析计算理论,得到了残积土边坡降雨作用下的稳定渗流场,编制了考虑降雨渗流引起渗透力作用的边坡非线性有限元计算程序,计算模型采用Duncan非线性弹性模型和修正v值的Duncan模型。根据计算结果,分析了降雨渗流对残积土边坡的应力和变形的影响。边坡应力水平较小,但应重视边坡变形引起裂缝的防治。

The displacement character of certain residual soil slope affected by rainfall infiltration is introduced. The seepage analysis method of slope is discussed, and the steady seepage field of residual soil slope affected by rainfall infiltration is made. The non-linear finite element program of slope with seepage force by infiltration is compiled, non-linear elastic Duncan model and modified v of Duncan model in the program are adopted. The stress and deformation of residual soil slope under rainfall infiltration calculated with FEM are analyzed. Slop stress level is relatively small, but prevention from cracking of slop due to deformation is needed to pay more attention.