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Abstract Mononobe-Okabe formula is widely used in lateral seismic earth pressure calculation in the design of retaining walls. However，application scope of Mononobe-Okabe formula is strictly limited because of too many assumptions. The distribution of seismic earth pressure strength along the back of retaining wall and the position of application point of resultant force of seismic earth pressure can¢t be obtained. In order to compensate above shortcomings，based on planar rupture surface assumption of Mononobe-Okabe theory，horizontal slices analysis method is suggested to deduce analytical formulas of resultant force of seismic earth pressure，application position of resultant force and distribution of seismic earth pressure；and the explicit solution of critical rupture angle is obtained by graphic method. The influencing factors including horizontal and vertical seismic accelerations，batter angle of wall back，cohesion and external friction angle between filler and back of retaining wall，equispaced overloading are considered. The formulas can be used for seismic active and passive earth pressure calculations of cohesive soil or non-cohesive soil. The analysis results show that the distribution of seismic earth pressure strength along the back of retaining wall is nonlinear. The formula is the same as Mononobe-Okabe formula under corresponding simplified assumptions.
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Received: 13 May 2010
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2010, Vol. 29 
