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以某水库库岸滑坡为工程背景,根据饱和-非饱和渗流控制方程,针对不同滑坡体渗透性和库水位升降速率,研究库水位变化条件下滑坡体内孔隙水压力的动态响应,得到:(1)水位升降时,在相同的入渗条件下,饱和渗透系数对初始地下水位有明显的影响;增大饱和渗透系数能降低地下水位,使地下水位线变得平缓,滑坡体的动、静水压力减小,有利于稳定;(2)增加库水位升降速率,地下水位响应滞后变得显著,地下水位线形态整体变陡,滑坡体的动水压力增大,不利于边坡稳定性。
Based on the reservoir-bank landslide as an engineering background, according to the saturated-unsaturated seepage control equations, the dynamic response of pore water pressure in landslide under different water level changes was studied according to the permeability of different landslide bodies and the rate of water level rise and fall. Under the same infiltration conditions, the saturated permeability coefficient has a significant effect on the initial groundwater level. Increasing the saturation permeability coefficient can reduce the groundwater level and make the groundwater level become gentle. The dynamic and hydrostatic pressure of the landslide body (2) Increasing the rate of water level rise and fall, the response lag of groundwater level becomes significant, the shape of groundwater level steep as a whole, and the hydrodynamic pressure of landslide body increases, which is not conducive to the stability of slope.