考虑土拱效应的挡土墙主动土压力分析

Analysis on active earth pressure for retaining walls considering soil arching effect

基于朗肯土压力理论,推导了主动土压力系数的理论公式,并将其用于水平微分单元法,得到平动模式下主动土压力强度、合力及合力作用点的计算公式,并分析了内摩擦角及墙面摩擦角对土侧压力系数、土压力强度的影响,以期指导实践。

Based on Rankine＇s earth pressure theory,the theory formula is obtained including the lateral coefficient of active earth pressures.Using the coefficient in the method of horizontal differential element,and the theoretical formula of the unit earth pressures and the resultant earth pressures on horizontal translation are obtained.On the basis,the effects of the internal frictional angle and the frictional angle between the wall back and the backfill on the lateral coefficient of earth pressure,the unit earth pressure are investigated,so as to guide practice.