非稳定渗流作用的岩体边坡稳定非连续变形分析

建立了分析边坡非稳定渗流场的有限元模型;考虑库水位降落的非稳定渗流的影响,应用非连续变形分析方法分析了岩体边坡的变形规律,并确定了边坡断层的极限内摩擦角;利用传统安全系数的概念,分析了某水库水位降落时边坡的稳定性,得到了该边坡稳定安全系数随库水位降速的变化关系.结果表明,在现行水库运用方式下该边坡是稳定的.

Discontinuous deformation analysis of rock slope stability under unstable seepage flow

A finite element model for rock slope was established for analyzing the unstable seepage flow field.In consideration of the effect of unstable seepage flow during the falling of the reservoir water level,the deformation regulation of rock slope was analyzed by the discontinuous deformation analysis(DDA),and the ultimate inner friction angle of the fault was determined.Based on the conventional concept of the safety factor,the stability of rock slope during the falling of the reservoir water level was analyzed,and the relationship between the safety factor of slope stability and the speed of the falling of the reservoir water level was obtained.It is shown that the slope is stable under the current reservoir operation mode.