考虑饱和-非饱和渗流作用的土质边坡稳定性分析

饱和-非饱和土的研究一直是岩土工程界的一个热点问题.土体中孔隙水压力的存在使得对岩土体的力学性状的分析变得更加复杂化.基于土体渗透系数与基质吸力之间的相互联系,对理想的各向同性土的水库堤坝进行了非稳定渗流场的数值模拟,得出不同水位、同一水位因不同骤升速率而产生的渗流场的变化规律,并对土体固-液耦合研究进行了初步探讨.把堤坝渗流场的动态变化在时间和空间上进行离散,分别引入到坝坡稳定性的分析中,以极限平衡原理和Morgenstem-Price条分法为基础对坝坡产生滑移的最小安全系数变化规律进行了分析,从而得出渗流一滑坡的内在联系.

Stability analysis of soil slopes considering saturated and unsaturated seepage effect

Researches on saturated-unsaturated soils became a hot issue in resent years.In fact,it is very difficult to analyze the mechanical behaviors of soil because of the pore water pressure's existence.Based on the relationship between permeability and matric suction,numerical simulation of unsteady seepage analysis of an ideal isotropic embankment is presented.And the dynamic change of the seepage field is temporally and spatially discretized and inducted into the stability analysis of the embankment slope.Regu...