Seismic Stability Analysis of High-Fill Embankment

Three problems remained to be solved in the analysis of the seismic stability of high-fill embankment: the pseudo-static method was defective, the embankment damage model was not clear, and the stability evaluation index was still to be discussed. It analyzed the dynamic response of a typical transect of high embankment with FEM to find out its instability mechanism. Then it chose the most dangerous sliding surface and analyzed its stability. The selection of the evaluation index of the seismic stability of high-fill embankment was discussed at last. The results show that the upper embankment, especially the shoulder is easily to be damaged. It is too conservative to use the safety factor as the involution index of the seismic stability of high-fill embankment, and the permanent displacement is a better choice.