库水位升降对李家坡滑坡稳定性的影响

Impact of Reservoir Water Fluctuation on Stability of Lijiapo Landslide

以三峡库区巫山李家坡滑坡为研究对象,依据勘察资料和试验资料等,应用地学软件GeoStudio中的SEEP模块和SLOPE模块建立相应的模型,用实时监测数据对模型进行校正,用校正后的模型模拟库水位以不同速率升降对滑坡稳定性的影响。研究结果表明:水库型滑坡稳定性受库水位升降速率影响明显,稳定性变化主要受静水压力、动水压力、库水浮托力、岩土体物理力学性质变化等共同影响,变化趋势由占主导地位的影响因素决定。

The paper established a corresponding model by taking Lijiapo Landslide in the Three Gorges Reservoir area as a an object of study,using SEEP module and SLOPE module of geoscience software GeoStudio based on collected data and test data.It revised the model by using real-time monitoring data and simulated the influence of reservoir water level under different rising or falling rates to landslide stability by using the revised model.The outcomes show that the impact of reservoir water rising or falling rates on reservoir landslide stability is controlled by a variety of factors,including hydrostatic pressure,hydrodynamic pressure,uplift force,physical and mechanical properties of rock and soil mass,and the stability trend depends on the dominant factors.