降雨入渗对路堤边坡稳定性研究

基于非饱和土单变量的有效应力理论，建立了非饱和水-气两相的流体-固体耦合方程，在考虑地表径流-地下渗流和流体-固体双耦合的情况下，以达成线K240+10~70段因降雨产生的边坡破坏为工程实例，对计算理论模型进行了数值验证，同时对各种影响边坡稳定性因素进行了数值计算，对其破坏范围、降雨引起的破坏深度和入渗深度进行了分析，综合各种影响因素，其中降雨强度和历时及长期强度的影响最为明显。

Stability of embankment slope subjected to rainfall infiltration considering both runoff-underground seepage and fluid-solid coupling

Based on the effective stress theory of a single variable of unsaturated soil, unsaturated water-gas fluid-solid coupling equations are established. The railway K240+10-70 from Dazhou to Chengdu, Sichuan, is damaged caused by rainfall considering runoff-underground seepage and fluid-solid coupling, with numerical simulation of engineering examlpe of the slope. The corresponding characteristics of the numerical simulation damage and the examlpe are exactly the same, which prove that the numerical simulation is feasible, and what’s more, with numerical simulations, effects of kinds of factors on slope stability subjected to rainfall are analyzed with its scope and depth of damage and infiltration depth of rainfall, from which it can be concluded that the intensity of rainfall and duration and long-term strength have more effects on slope stability subjected to rainfall.