【作者】 张望城； 蒋明镜； 刘芳； 周雅萍； 肖俞；

【Author】 ZHANG Wang-cheng 1, 2 , JIANG Ming-jing 1, 2 , LIU Fang 1, 2 , ZHOU Ya-ping 1, 2 , XIAO Yu 1, 2 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China 2. Key Laboratory of Geotechnical and Underground Engineering with the Ministry of Education, Tongji University, Shanghai 200092, China

【机构】 同济大学地下建筑与工程系； 同济大学岩土及地下工程教育部重点实验室；

【摘要】 挡墙的位移模式和位移量是影响墙后土压力的两个主要因素.位移模式不同,土压力分布和总土压力的变化不同;位移量不同,土压力分布和总土压力也不同.采用离散元分析软件PFC2D模拟了墙后填土为砂土的倾斜刚性挡墙在不同位移模式下主、被动土压力的渐进变化过程.分析了不同位移模式下总土压力的变化、土压力分布情况、合力作用点和土体滑裂面形状等问题.模拟结果表明:不同位移模式下,总土压力渐进变化直到极限状态;RT模式和RB模式下土压力分布非线性,T模式下土压力线性分布;RT和RB模式下合力作用点偏离Coloumb理论解;RT模式和T模式下滑裂面为通过墙踵的曲线,RB模式下滑裂面不通过墙踵;RT模式下靠近墙顶处土体存在显著的土拱效应.更多还原

【Abstract】 Movement mode and displacement of retaining wall have significant influence on the earth pressure against the retaining wall. This paper studies the active and passive earth pressure against inclined retaining wall filled with sandy soil with different movement modes by using discrete element method (DEM) commercial software PFC2D. The total earth pressure and the distribution of the earth pressure against the retaining wall which change with different movement modes and displacement of the retaining wall are studied. The shape of the sliding surface of the soil behind the retaining wall is also studied. The results show that distribution of the earth pressure with RT and RB modes is nonlinear, while linear with T mode. The action point is different from the solution of Coloumb with increasing of the displacement at RT mode or RB mode. The sliding surface progressively appears as a curve which passes through the bottom of the retaining wall except at RB mode. The soil arch effect exists on the top of the retaining wall with RT mode in the active state.更多还原