关键词: 砂土边坡, 罕遇地震, 地下水, 动力响应, 安全系数

Abstract: Based on the finite element model of sandy slope，the stability and dynamic response of sandy slope are studied.The results showed that the safety factors calculated by the Chinese specification are relatively conservative，compared with the Japanese specification based on the pseudo-static method.With the increase of groundwater，the maximum horizontal displacement of slope shows increasing，and reaches maximum horizontal displacement on the top of the slope.The displacement under near-field earthquake is greater than that under far-field earthquake.The accelerations along the slope height with groundwater are less than that without groundwater，which shows that the existence of groundwater damps vibration.Shear stress and shear strain with groundwater becomes more full，that is，shear damage is more likely to occur with groundwater.Without considering the groundwater，the destruction of slope is mainly the circular shearing damage through the slope toe，while the destruction is not yet through the slope toe，but from a point on the front of slope.

Key words: Sandy slope, Rare earthquake, Groundwater, Dynamic response, Safety factor