基于非饱和土有限元强度折减法的降雨入渗条件下高边坡施工稳定性分析

根据质量守恒定律推导了非饱和土渗流分析控制方程,采用全隐式向后差分格式求解此类有限元问题;将非饱和土有限元强度折减法应用于某高边坡工程的施工稳定性分析,得到了该边坡在各施工阶段下受到降雨入渗作用影响后的稳定安全系数及其失稳滑动面,并通过与不考虑降雨作用时的情况进行对比得出有益的结论;最后,针对该边坡的施工稳定性分析结果提出了加固建议。

Construction stability analysis of high slope under rainfall infiltration based on FEM strength reduction of unsaturated soil

The governing equations of seepage analysis are derived by the law of conservation of mass, and this type of FEM issue is solved using fully implicit backward difference format. The method of FEM strength reduction of unsaturated soil is employed in construction stability analysis of the high slope. The safety factors and sliding surfaces of every construction phase on the effect of rainfall infiltration are obtained, and useful conclusions are drawn by comparing with the results of no rainfall infiltration. Furthermore, on the basis of the research results, advices on the reinforcement are proposed. The ideas and methods proposed may serve as a reference for the design and construction of similar projects.