Dynamic Studies of Geogrid Filling Slope under Horizontal Seismic Force

Based on the principle of three-dimensional Lagrangian finite difference,the article used the quasi-static method and dynamic method to analyze the dynamic characteristics and seismic performance of geogrid filling slope.The study results showed that the geogrid can well improve the strength and seismic performance of filling soil body;the calculation results of dynamic method is much safer than the calculation results of quasi-static method,and only the dynamic method can analyze the main cause of filling-slope instability.