基于倾斜分层的挡墙主动土压力计算方法  

Calculation method of active earth pressure of finite soil retaining wall based on simplified principal stress trajectory

作　　者：刘新喜 李彬 王玮玮 李松 贺程 LIU Xinxi;LI Bin;WANG Weiwei;LI Song;HE Cheng(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41-48,共8页Journal of Transport Science and Engineering

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

摘　　要：为研究挡墙后有限土体的主动土压力计算方法,先将小主应力迹线的形状由圆弧形简化为倾斜的直线;然后,将挡墙后土体划分为若干个倾斜直线形薄层单元;再针对挡墙后成层填土的极限平衡条件,提出一种有限土体挡墙主动土压力的计算方法,并给出了主动土压力合力及其作用点高度的理论表达式;最后,将该方法应用于某工程实例,通过比较该方法的计算结果与其他算法的计算结果及试验值的异同,验证该方法的正确性与合理性。In order to study the active earth pressure of the finite soil behind the retaining wall,the trace of small principal stress is simplified from circular arc to inclined straight line,and the soil behind the retaining wall is divided into several inclined straight thin layer elements.In view of the limit equilibrium condition of the layered soil behind the retaining wall,a method for calculating the active earth pressure of the finite soil retaining wall is proposed,and the theoretical expression of the active earth pressure force and the height of the applied point is given.Finally,the correctness and rationality of the method are verified by comparison with an example.

关 键 词：挡墙 有限土体 主动土压力 小主应力迹线 倾斜直线形薄层单元 

分 类 号：TU443[建筑科学—岩土工程]