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以三峡库区川主庙滑坡1-1纵剖面为计算剖面,基于饱和—非饱和渗流理论,采用二维有限元渗流分析软件对滑坡在库水位下降条件下的渗流场进行非稳定数值模拟,获得了该滑坡在库水位下降条件下的浸润线、总水头及孔隙水压力的变化情况,进而得到渗流场的变化规律。结果表明,在库水位下降过程中,滑坡后缘部位浸润线呈上升状态,滑坡中部和前缘部位基本与初始状态重合;随库水位的下降,前缘总水头将减小,后缘总水头几乎不变;坡体中的孔隙水压力随库水位下降而升高,最终趋于稳定值。
Taking the 1-1 section of the Chuanzhumiao landslide in the Three Gorges reservoir area as a calculation section, the unsteady numerical simulation of the seepage field of the landslide under the condition of the reservoir water level falling is carried out by using the 2D finite element seepage analysis software based on the theory of saturated-unsaturated seepage. The change of infiltration line, total head and pore water pressure of the landslide under the condition of reservoir water level descending was obtained, and the variation law of seepage field was obtained. The results show that during the descending process of reservoir water level, the infiltration line in the trailing edge of the landslide is in an ascending condition, and the central part and the leading edge of the landslide basically coincide with the initial state. With the decrease of the reservoir water level, the total head of the leading edge will decrease, Almost unchanged; pore water pressure in the slope with the reservoir water level decreases and eventually tends to a stable value.