Abstract:Based on the general principle of 3D hydro-mechanical coupling of finite differential equation,FLAC3D is applied to analyze the 3D saturation-unsaturation flow for the hydro-mechanical coupling of the embankment of Tai¢an Pumped-storage Station. At the same time,the effect of foundation excavation on the stability of embankment and slope of the foundation is studied. Computational result indicates that the core wall is very good for preventing seepage and enhancing the stability of the embankment and slope of foundation. The effect of excavating process on the stability of embankment and slope of the foundation is only local. Nearly no serious breakage of embankment and foundation occurs,and the designed width of the flat roof is rational.