Abstract：The borehole inclinometer monitoring results indicate that the talus slope at the left riverbank in front of the dam of Zipingpu hydraulic project is stable until Wenchuan 8.0 earthquake，for no significant changes of displacements are observed in the slope and no obvious direction is found in the calculated displacement vectors. The Wenchuan 8.0 earthquake has brought negative effect on Zipingpu hydraulic project，which is only 17 km from the epicenter. According to the monitoring results and field investigation，the influence of the earthquake on the talus slope can be summarized as follows. Some local collapses and cracks appear on the surface of the front slope of Dengzhanping plateau，and an obvious dislocation was produced in the joint surface between bedrock and overlying talus. The maximum offset of the joint surface is 60 to 70 mm；above the surface，the displacement increases as the elevation and reaches ground with a range of 55 to 100 mm，and the maximum value is 206 mm. The displacement is formed at a specific direction due to the earthquake；and the vector is vertical approximately to the fault of Wenchuan 8.0 earthquake. The inclination of the observed hole is remarkable with a maximum rate of 1.873‰. The deformation was influenced mainly by main shock and hardly by the aftershock. The continuous monitoring data of post-earthquake show the talus slope is globally stable.
