基于滑移线法挡土墙土压力问题的讨论  

Discussion on soil pressure against retaining wall based on slip line method

作　　者：姜朋明[1] 尚羽[1] 陆长锋[1] 

机构地区：[1]江苏科技大学土木与建筑工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2008年第6期9-12,共4页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：江苏省高校自然科学基金资助项目(08KJB130001);镇江市社会发展资助项目(SH2007074)

摘　　要：传统的土压力理论根据墙后土体极限平衡所得,没有考虑极限状态下土体的速度边界,为上限解或下限解.文中基于滑移线法,利用上下限定理,对墙后土体的静力场和速度场进行了计算,分别求得考虑和不考虑墙土摩擦时,土体中的应力场、速度场和土压力分布.计算结果表明:考虑墙土摩擦时,极限状态对应的速度边界条件为挡土墙转动加平动状态;不考虑墙土摩擦时,土压力和朗肯土压力一致,对应挡土墙平动状态.Traditional earth pressure theory is based on the limit equilibrium of soil of behind the wall, and it doesn＇t consider velocity boundary at limit state, which is the upper or lower bound solution. Through on upper and lower bound theorems and slip line method, this paper computes the static field and velocity field, and obtains stress field, velocity field, and earth pressure distribution when considering and no considering the friction between soil and retaining wall. The computing results show that the retaining wall rotation mode under considering friction between soil and retaining wall is translation and rotation state. On the contrary, it is translation state.

关 键 词：极限分析 土压力 滑移线 上下限定理 

分 类 号：TU43[建筑科学—岩土工程]