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滑坡体的稳定性对水库的安全运行有重大影响,而地下水的运动是影响滑坡体稳定性的重要因素。结合现场调查,采用饱和—非饱和渗流分析法研究了库水位涨落与降雨联合作用下滩坑水电站库区绿草码头滑坡体的渗流场,并在此基础上采用极限平衡分析法分析了滑坡可能的失稳破坏模式与程度,评价了滑坡在库水涨落与天然降雨联合作用下滑坡的稳定性变化规律。结果表明,库水涨落与天然降雨联合作用对滑坡稳定性有不利影响,滑坡存在渐近失稳的可能,需加强对滑坡的监测和巡查,以掌握滑坡体的变形发展趋势。
The stability of landslide has a significant impact on the safe operation of reservoirs, and the movement of groundwater is an important factor affecting the stability of landslide. Based on the field investigation, the seepage field of the landscaped landslide of the Green Grass Terminal in the reservoir area of the pit-pit hydropower station under the combination of reservoir water level fluctuation and rainfall was studied by means of saturated-unsaturated seepage analysis. On the basis of this, the limit equilibrium analysis method was used to analyze the landslide Possible failure modes and degrees of failure, and evaluate the stability of landslides under the joint action of reservoir water fluctuation and natural rainfall. The results show that the combined effect of reservoir water fluctuation and natural rainfall adversely affects the stability of landslide. Asymptotic instability of landslide is possible. Monitoring and inspection of landslide need to be strengthened to grasp the deformation trend of landslide.