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基于某水电站右岸高边坡基本地质条件和雾化雨资料,采用饱和-非饱和渗流有限元分析方法,研究了边坡在雾化雨条件下的渗流场变化规律,并借鉴非饱和强度理论,运用强度折减法分析了雾化雨对边坡稳定性的影响。分析结果表明,雾化雨条件下地表水入渗将导致非饱和区范围缩小、压力水头升高并出现局部暂态饱和区;考虑非饱和区强度变化及饱和区渗透力影响,降雨入渗时边坡稳定性将明显下降。
Based on the basic geological conditions and atomizing rain data of the high slope on the right bank of a certain hydropower station, the variation law of seepage field under the condition of atomizing rainfall is studied by means of saturated-unsaturated seepage finite element method. Based on the theory of unsaturated strength, The strength reduction method is used to analyze the influence of atomized rain on the slope stability. The results show that infiltration of surface water under atomized rain will lead to the shrinking of the unsaturated zone and the rise of pressure head and the emergence of partial transient saturated zone. Considering the strength change of unsaturated zone and the infiltration of saturated zone, Slope stability will be significantly reduced.