绕墙顶转动位移模式下黏性土挡土墙的被动土压力研究  

Passive earth pressure of clay backfill acting on retaining wall rotated by coping

作　　者：刘涛[1,2] 钱明 赵琦 孙薇薇[4] 刘德稳[4] 

机构地区：[1]成都理工大学环境与土木工程学院,成都610059 [2]内江职业技术学院建筑工程系,四川内江641100 [3]中国石油天然气华东勘察设计研究院岩土工程处,山东青岛266071 [4]西南林业大学土木工程学院,昆明650224

出　　处：《中国科技论文》2015年第1期35-38,共4页China Sciencepaper

基　　金：国家自然科学基金资助项目(51209180);中国石油工程建设公司科学研究与技术开发项目(CPECC2013KJ02);云南省科技厅应用基础研究项目(2011FZ143)

摘　　要：以黏性土为研究对象,针对挡土墙在绕墙顶转动下的土拱效应进行研究。根据土拱曲线的土体应力状态,给出黏性土条件下的侧向被动土压力系数及层间摩擦系数求解公式。在上述两大系数基础上提出了变换方法,将其运用到薄层微分法中,给出了绕墙顶转动下的挡土墙被动土压力分布解。试验结果表明,绕墙顶转动位移模式下挡土墙被动土压力与绕墙顶转动位移模式类似,也呈凹形曲线。随着土拱效应δ/φ的增大,被动土压力非线性分布加强。It was necessary to investigate the soil arching effects on the passive earth pressure due to rotation movement by coping against the clay backfill.Based the analysis of soil stress state,the coefficient of lateral passive earth pressure and coefficient of the interlayer friction pressure were obtained.By the transform technique applied to the above two formula,the distribution of passive earth pressure for rotational movement mode and total earth pressure were derived respectively.It showed the passive earth pressure behind the retaining wall for the rotation by coping was nonlinearly distributed which was similar to the passive earth pressure of the translation movement mode.It has also been shown that with the increase ofδ/φ,the arching effects became more significant.

关 键 词：黏性土挡土墙 被动土压力 绕墙顶转动位移模式 变换方法 

分 类 号：TU476.4[建筑科学—结构工程]