Rheology model of rockfill used in the rheology analysis of concrete face rockfill dam

Based on previous researchers, this paper establishes a rheology model of rockfill used in the rheology analysis of concrete face rockfill dam despiting the rockfill microstructure. In this model, the instantaneous elasto-plastic deformations of rockfills are computed by the oblong-parabola two yield surface model, and considering the time effects, the time dependent visco-plastic deformations are derived from the empirical equation of hyperbolic function. The reliability of this rheology model is proved to be good after performing inverse problems with deformation records in-situ.