降雨与库水位共同作用下近坝库岸边坡滑坡模型试验研究

根据云南省龙江水电站近坝库岸边坡滑坡特点,为了对降雨与库水位共同作用下近坝库岸边坡滑坡有深入的了解,进行了降雨与库水位共同作用下边坡滑坡大型模型试验研究。试验结果表明:降雨是引起近坝库岸边坡滑坡的重要因素,降雨与库水位共同作用下近坝库岸滑坡有效应力减小,研究库水位以下边坡土体的抗剪强度减小;库水位作用使得边坡产生沉降和裂缝,边坡的滑坡是由降雨和库水位共同作用引起,库水位以下边坡土体水分入渗充分,边坡内部孔隙水压力较大,边坡易产生滑坡且滑坡规模较大,近坝库岸边坡滑坡属于浅层牵引式滑坡。

Landslide model for slope of reservoir bank under combined effects of rainfall and reservoir water level

According to the landslide characteristics of the slope of the reservoir bank of Longjiang Hydropower Station in Yunnan Province, laboratory tests are conducted to investigate the characteristics of the landslide under the combined effects of rainfall and reservoir water level. The results show that the rainfall is an important factor for causing landslides of the reservoir bank near the dam, and the effective stress of the slope is reduced by the combined effects of rainfall and reservoir water level. Therefore, the shear strength of the slope decreases, and the subsidence and cracks of the slope are induced by the action of reservoir water level. The landslide of the slope is caused by the interaction of rainfall and reservoir water level. For the soil of the slope under the reservoir water level, the moisture infiltration is sufficient, and the pore water pressure inside the slope is large. Landslides are easily induced near the reservoir bank, and such kind of landslide belongs to the drawing landslide in shallow surface.