Stress and Deformation Analysis of Zhangfeng Sloping Core Rock-fill Dam with Static-dynamic FEM

According to the actual geological and topographical conditions of Zhangfeng reservoir pivot project,3-D static and dynamic finite element method is adopted to obtain the stress and strain distribution laws of clay sloping core rock-fill dam at the time of completion period and operation period by using Duncan-Chang nonlinear elastic model and modified Hardin-Drnevich model.The results show that the safety factors of dam slope is large than allowable value of specification at all operating conditions;dam foundation with soft interlayer has not impact on the dam stability;the maximum dam settlement in completion period is 33 cm or 0.46% of the dam height,and the maximum level displacement in operation period is 31.6 cm;the dam internal stress level values are less than 1.