曲线滑裂面下RB模式的主动土压力计算方法  

Active earth pressure solution for RB displacement mode under curved slip crack surface

作　　者：李松 刘新喜 王玮玮 李彬 LI Song;LIU Xinxi;WANG Weiwei;LI Bin(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《交通科学与工程》2023年第2期87-94,共8页Journal of Transport Science and Engineering

基　　金：国家自然科学基金(51674041);湖南省研究生科研创新项目(CX20200839)。

摘　　要：为研究在RB模式下挡土墙的主动土压力解的问题,假定滑裂面为曲线滑裂面,提出在RB模式下主动土压力的计算方法,采用水平分层的方法推导出主动土压力的微分方程,并用有限差分法对其进行求解,并将计算结果与相关试验结果进行对比,验证该方法的准确性。还讨论了主动土的压力分布、合力大小及合力作用点位置对墙顶位移的影响。研究结果表明:这三者均与墙顶位移之间存在负相关关系。In order to study the problem of solving the active earth pressure of retaining walls in RB mode,this study assumes that the slip crack surface is a curved slip crack surface,proposes the calculation method of active earth pressure in RB mode,derives the differential equation of active earth pressure by using the horizontal stratification method,and solves it by the finite difference method,and compares the calculation results with the relevant test results to verify the accuracy of the method.This study also discusses the effect of wall top displacement on the pressure distribution of the active soil,the magnitude of the combined force and the location of the point where the combined force acts.The results of the study show that there is a negative correlation between all three of these and the top of wall displacement.

关 键 词：挡墙 主动土压力 RB模式 曲线滑裂面 水平微分法 

分 类 号：TU443[建筑科学—岩土工程]