ABSTRACT
In many river basins, the deposit slope is widely distributed, it is easy to lose stability under the action of reservoir water variation and strong earthquake, and the induced geological disasters that seriously endanger life and engineering construction. In this paper, the stability of a deposit slope case under the action of reservoir water variation and strong earthquake is studied. The case is located in reservoir bank of Jinjidadan River arch bridge in Yunnan Province, China. Using the Geostudio software, the static and dynamic responses of slope under different reservoir water levels and seismic intensity are simulated. The distribution characteristics of pore water pressure under different working conditions are analyzed, and the evolution law of safety factor of slope with reservoir water variation is studied. Adopting two evaluation indicators including dynamic safety factor and permanent displacement, the dynamic stability of the deposit slope under the combination of water level and seismic intensity is analyzed. The results show that the slope is in a stable state under reservoir water variation, however, it is prone to landslide whether it is a low or high reservoir water level under VIII degree earthquake, which needs to be strengthened.
