摘要
简要分析了多孔介质饱和-非饱和渗流数学模型,探讨了非稳定时间插分格式、计算参数和降雨入渗边界处理等相关问题;基于非饱和土抗剪强度理论和延展的Mohr-Coulomb屈服准则,将有限元强度折减法推广到非饱和土边坡稳定分析中。以某边坡为例,模拟了降雨入渗引起的边坡体内暂态渗流场,并采用推广的有限元强度折减法进行了降雨条件下边坡的稳定性分析。
The mathematical model for the saturation-unsaturated seepage of porous medium is analyzed briefly,and the relative problems such as the unsteady time difference scheme,the managements for parameter and rainfall infiltration boundary are discussed.The strength reduction FEM,which is based on unsaturated soil shear strength theory and extended Mohr-Coulomb failure criterion,is extended in the unsaturated slope stability analysis.The transient seepage field is simulated,and the slope stability is analyzed by ...
出处
《水利学报》
EI
CSCD
北大核心
2007年第S1期346-351,共6页
Journal of Hydraulic Engineering
基金
国家自然科学基金项目(50539030)
国家自然科学基金雅砻江水电开发联合研究基金重点项目(50539110)
973计划课题(2002CB412707)
关键词
降雨入渗
饱和-非饱和渗流
边坡稳定
有限元强度折减法
rainfall infiltration
saturation-unsaturated seepage
slope stability
strength reduction FEM
