降雨对大型水库滑坡稳定性影响分析

Analysis of the Large Reservoir Landslide Stability Influenced by Rainfall

自然界绝大多数滑坡都是在降雨期间发生的,研究降雨对滑坡的稳定性的影响具有十分重大的意义。以澜沧江某电站水库的一个滑坡为例,通过对滑坡渗流场的模拟,得出滑坡体中的地下水浸润线位置、压力水头,进而结合刚体极限平衡理论计算该滑坡稳定性系数,分析在不同蓄水期、不同降雨条件对滑坡稳定性的影响,对库区滑坡稳定性评价和治理具有一定指导作用。

It is of great significance to research the stability of the landslide influenced by rain, which breaking out mostly in nature during rainfall. Taken a landslide of the reservoir on Lancang River for example, the landslide＇ s groundwater infiltration line position and the pressure head were obtained base on simulation analysis of groundwa- ter seepage field in it, then combine limit equilibrium theory to calculate the landslide stability coefficient, and analysis the stability of landslide influenced by different rainfall conditions in different water storage, which has guidance function for evaluation and administration of reservoir bank slope.