STABILITY STUDY ON RESERVOIR ACCUMULATION BODY CONSIDERING PHYSICAL AND CHEMICAL REACTIONS BETWEEN WATER AND ACCUMULATION BODY —TAKING XIAZANRI ACCUMULATION BODY FOR EXAMPLE
Abstract：Taking Xiazanri accumulation body for example，the parameters of accumulation body under natural situation and after physical and chemical reactions with reservoir water are obtained using large-scale horizontal push-shear in-situ test. Based on these parameters，numerical model to calculate the safety factor of reservoir accumulation slope is built. The results show that under two situations(with/without considering chemical and physical reactions between water and accumulation body)，the changing trend of safety factor of slope is the same as the reservoir water level ascends，which decreases at first and then increases. However，compared with the former，the factor of safety under the latter situation decreases more，and decreasing ratio can reach 35.34% or more. Therefore，factor of safety calculated only considering the water-rock mechanical reaction is not reliable in practical engineering design.
