平动模式下挡土墙非极限主动土压力计算方法  

Calculation Method of Non-limit Active Earth Pressure for Retaining Wall with Mode of Translation

作　　者：陈建旭 宋文武 虞佳颖 罗旭 万伦 CHEN Jian-xu;SONG Wen-wu;YU Jia-ying;LUO Xu;WAN Lun(School of Energy and Power Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学能源与动力工程学院,成都610039

出　　处：《科学技术与工程》2018年第27期205-210,共6页Science Technology and Engineering

基　　金：四川省科技厅项目(2016JY0187);四川省教育厅重大培育项目(14CZ0013)资助

摘　　要：针对平动模式下的挡土墙,同时考虑墙后滑裂部分土体所产生的土拱效应以及土层间的剪应力,并引入墙体位移量与土体内外摩擦角非线性的函数关系,利用水平层分析法,得到了平动模式下挡土墙非极限主动土压力强度、合力大小、合力作用点高度的理论公式。相比其他方法的理论值与试验值吻合得更好。参数敏感性分析结果表明:土压力强度随位移比、内摩擦角增大而减小;随外摩擦角(墙土摩擦角)的增大,其值在墙体上部略微增大,下部明显减小;土压力合力系数随位移比、内外摩擦角增大而减小;土压力合力作用点高度随外摩擦角的增大而增大,而位移比与内摩擦角对其影响甚微。For the retaining wall with mode of translation,the soil-arching effect which was produced by the landslide and the inter laminar shear stress are taken into account simultaneously,introducing the nonlinear functions between the displacement of the wall and the internal and external friction angle of soil,the theoretical formula of non-limit active earth pressure intensity,resultant force and the points of application of resultant force on retaining wall with mode of translation were obtained by using horizontal analytic method.Compared with other methods,the theoretical values were more consistent with the experimental values.Parameters sensitivity analysis results show that the soil pressure intensity decreases with the increase of displacement ratio and internal friction angle.With the increase of external friction angle(wall and soil friction angle),it increases slightly in the upper part of the wall and decreases obviously in the lower part.With the displacement ratio,internal and external friction angle increases,coefficient of resultant earth pressure decreases.The height of the points of application of resultant force on retaining wall increases with the increase of external friction angle,while the displacement ratio and internal friction angle have little effect on it.

关 键 词：平动模式 非极限主动土压力 土拱效应 剪应力 水平层分析法 

分 类 号：TU432[建筑科学—岩土工程]