库水位下降对三峡库区滑坡稳定性的影响研究

Study of the Influence of Reservoir Drawdown on the Landslide Stability

在定性阐述三峡库区水位下降对滑坡渗流场变化的影响机理,通过对滑坡典型地质断面结合实际边界条件,建立二维有限元模型,用有限元法模拟库水位不同下降速度对滑坡体内渗流场变化的影响,并用改进的极限平衡法结合渗流场计算的孔隙水压力值对滑坡安全系数进行计算,为库区滑坡的预测和治理提供依据。

The paper qualitatively elaborates the mechanism how the drawdown of water level influence the landslide seepage field,establishes a two-dimensional finite element model through the typical geological cross-section of landslide with the actual boundary conditions,and uses the finite element method to simulate the change in seepage field water after the level declining and to calculate the landslide the safety factor through the improved limit equilibrium method with pore water pressure values.