考虑土拱效应的挡土墙地震土压力及其分布

Seismic Earth Pressure on Retaining Wall Considering Soil Arching Effects and Its Distribution

以Mononobe-Okabe理论的基本假设为前提,采用水平层分析法建立了地震作用下主动土压力强度的一阶微分方程,得到了土压力分布、合力及合力作用点的理论公式,并与不考虑土拱效应影响的计算方法和模型试验数据进行了比较。结果表明,所得合力公式与Mononobe-Okabe公式吻合;地震影响系数对土压力强度分布影响较大,合力作用点高于墙高1/3,并随地震系数的增大逐渐提升;土拱效应对合力作用点的位置影响较大,在墙土接触面较粗糙时应考虑土拱效应的影响。

Based on the basic assumption of Mononobe-Okabe theory and by using the method of level-layer analysis,the first-order differential equation of the active pressure considering arching effects on rigid retaining walls is set up under earthquake loads,and the theoretical formula of the unit earth pressure,the resultant force and the point of application of the resultant force are obtained as well.Then,present method has been compared with other computing methods without considering soil arching and some exper...