RT模式下刚性挡墙土压力计算方法研究

针对绕墙顶向外转动的刚性挡土墙，提出一种土压力计算方法。根据土体渐进破坏机理，考虑土拱效应，建立了填土内摩擦角及墙土接触面上外摩擦角的发挥与土体位移的非线性关系，并根据初始应力条件确定初始内摩擦角。采用改进的水平层分析法计算各转角下的土压力分布，并得到土压力合力大小及其作用点的计算公式。通过比较，不同转角下土压力强度、合力大小以及作用点计算值与模型试验实测结果接近。

Earth pressure against rigid retaining wall rotating about top

A reasonable method was proposed to calculate earth pressure on rigid retaining wall rotating outward about the top, Based on the progressive rupture mechanism of backfill and arching effect, the nonlinear relationships between the wall movement and the mobilized angles of internal friction and wall friction were developed; and the initial frictional angles were decided on the initial stress condition. The modified horizontal layer analysis method of active pressure was used to calculate lateral earth pressures, total lateral forces and the applied points under different rotating angles, Comparisons between the calculated results and observations from model test show that the proposed method can provide a good prediction of lateral earth pressures for walls rotating about the top.