Analysis of Stress and Deformation for concrete face rockfill dam in Downstream Reservoir of a Pumped-storage Power Station

Abstract

Stress-deformation behavior of the concrete face rockfill dam of the construction period and filling period is simulated based on the three dimensional nonlinear finite element method and engineering situation. The three dimensional finite element method is applied, with introuducing the Duncan-Chang E-B model for rockfill materials and overburden cover and Goodman element without thickness for the interface. The numerical simulation is used to Study the different rockfill materials parameters influencing the behaviour of stress-deformation of dam body. The study shows that the stress and displacement distribution regularity of the concrete face rockfill dam of the lower reservoir of the pumped storage power station with normal range, and no special adverse behavior is found. The design conform with the regulatins, and its working characteristics conform to the general law. Besides, the rockfill materials parameters have significant influence on the deformation behaviour of the dam body and face-slab.