(1. Key Laboratory of Soft Soils and Geoenvironmental Engineering，Ministry of Education，Zhejiang University，Hangzhou，Zhejiang 310058，China；2. Institute of Geotechnical Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China)
Abstract：On the basis of quasi-static theory of Mononobe-Okabe，the angle of sliding surface is obtained according to the static equilibrium after analyzing the stress of the filling behind retaining wall. Considering soil arching effect，the static equilibrium and moment equilibrium equations are then derived from analysis of the stress of microelement of filling layer which is in a normal stress state，using the method of horizontal layer analysis. After that，the formulas of active earth pressure，coefficient of earth pressure and action point of resultant force of filling behind the retaining wall under seismic activity，which are more usable，are respectively obtained. The influences of internal friction angle，wall friction angle，horizontal and vertical seismic coefficients on the angle of sliding surface，active earth pressure，coefficient of earth pressure and action point of resultant force are numerically analyzed. Furthermore，the results obtained by the proposed method are compared with those computed by other methods and experimental observation.
2013, Vol. 32 
