不同位移模式刚性挡墙被动土压力通用计算方法(英文)

刚性挡墙被动位移模式包括平移(T)、绕墙顶一点转动(RTT)、绕墙顶转动(RT)、绕墙底一点转动(RBT)和绕墙底转动(RB)。挡墙位移模式对刚性挡墙被动土压力分布有重要影响。这一点目前缺乏理论解析解,需要建立考虑位移模式影响的刚性挡墙被动土压力分析方法。为此,建立被动位移模式函数,提出土体由一系列弹簧和理想弹塑性体组成,沿挡墙任一点被动土压力与相应水平位移成线性关系假定,得到了不同位移模式刚性挡墙被动土压力的计算公式。研究结果表明,被动土压力合力与Coulomb被动土压力的计算结果相等,但是被动土压力分布与挡墙位移模式参数m密切相关,为土体深度z的二次函数。被动土压力合力作用点也与挡墙位移模式参数m密切相关。所得的被动土压力分布与试验结果吻合较好。所提的不同位移模式刚性挡墙被动土压力通用计算方法具有重要的理论分析价值。

A general method to calculate passive earth pressure on rigid retaining wall for all displacement modes

A general analytical method to calculate the passive rigid retaining wall pressure was deduced considering all displacement modes.First,the general displacement mode function was setup,then the hypotheses were made that the lateral passive pressure is linear to the corresponding horizontal displacement and the soil behind retaining wall is composed of a set of springs and ideal rigid plasticity body,the general analytical method was proposed to calculate the passive rigid retaining wall pressure based on Coulomb theory.The analytical results show that the resultant forces of the passive earth pressure are equal to those of Coulomb’s theory,but the distribution of the passive pressure and the position of the resultant force depend on the passive displacement mode parameter,and the former is a parabolic function of the soil depth,The analytical results are also in good agreement with the experimental ones.