RB模式下挡土墙主动土压力强度的计算研究  

The study on active earth pressure against rigid retaining wall rotating about the base

作　　者：张健[1] 王新征[2] 胡瑞林[2] 

机构地区：[1]南阳师范学院土木建筑工程学院,河南南阳473061 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《铁道科学与工程学报》2016年第4期675-681,共7页Journal of Railway Science and Engineering

基　　金：国家自然科学基金青年资助项目(41402267);国家自然科学基金重点资助项目(41072226);南阳师范学院高层次人才项目资助(2014)

摘　　要：在经典库仑主动土压力理论基础上,结合RB模式下土体渐进破坏机理,建立内摩擦角和墙背与土体之间摩擦角的发挥程度与土体发生位移的非线性关系,将其引入到土压力强度计算公式中,得到RB模式不同位移情况下的土压力强度公式。通过算例讨论随深度变化的发挥内摩擦角和墙背与土体之间摩擦角关系对土压力强度分布的影响,不同位移情况下发挥内摩擦角和墙背与土体之间摩擦角随深度变化率对土压力强度分布的影响。最后将本文方法计算结果与模型试验及其他方法得出的结果进行对比分析,均表明本文方法和模型试验结果吻合较好,从而验证了该方法的可行性。Based on the Coulomb ＇s theory of active earth pressure and progressive rupture mechanism in the backfill,the wall movement and the associated mobilization of internal friction angles and wall friction angles were considered in a new simplified manner,a modified active earth pressure method was presented.The effect of the distributions of the mobilized internal friction angles and the mobilized wall friction angles which vary with depth on the distribution of earth pressure was discussed by a simulation example.In addition,the effect of the Derivative of the mobilized internal friction angles and the mobilized wall friction angles with respect to depth on the distribution of earth pressure was discussed.Comparisons of results by the proposed method with observations from model tests and other methods show that the method can provide a good prediction of lateral pressures for walls rotating about the base when proper distributions and the Derivative of the mobilized internal friction angles and the mobilized wall friction angles with respect to depth are used.

关 键 词：RB模式 主动土压力 摩擦角分布形式 

分 类 号：TU432[建筑科学—岩土工程]