电站坝址下游滑坡变形破坏机制物理模拟研究

在对金沙江某水电站滑坡的形态及变形特征、结构及物质组成特征、以及滑床特征等实际情况认真调查的基础上,选取贯穿滑坡体的Ⅱ-Ⅱ’主剖面,利用物理模拟研究方法中的底摩擦试验,再现了该边坡变形破坏的部分过程,并对变形及最终破坏机制进行了深入分析,确定该滑坡属滑移-弯曲型;同时,通过与3DEC离散元程序模拟研究及该边坡变形破坏的实际情况之对比分析,充分验证了该物理模拟研究方法的可行性。

Physical simulation on the sliding deformation failure mechanism at downstream slope of a hydropower station in southwest

This paper based on the investigation of actual distortion and damage of the low-angle dip bedding slope,such as the characteristics of the shape and deformation,the structure and matter constituent for the landslide in a southwest hydropower station,reappeaed the part process of deformation failure by choosing theⅡ-Ⅱ′ main section of the landslide and using basa contact friction expriment in the physical simulation method,synthetically analyzed the deformation of different phases and the final failure mechanism,and eventually confirmed that the landslide is belong to sliding-compression cracking.At the same time,according to the comparison of the research findings of the physical simulation method with the outcomes of 3DEC distinct element analysis and landslide stability analysis and with the actual distortion and damage of the landslide,this paper still adequately demonstrated the feasibility of the physical simulation method.