刚/柔性组合墙面加筋土挡墙受力机制分析  

Mechanical Performance Analysis of Reinforced Soil Walls with Flexible / Rigid Facings

作　　者：柳军修[1,2] 陈建峰[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《西南交通大学学报》2015年第6期984-992,共9页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金资助项目(41072200);上海市浦江人才计划资助项目(14PJD032)

摘　　要：基于刚/柔性组合墙面加筋土挡墙离心模型试验,建立了原型挡墙三维精细化数值模型,分析了连接件端板埋深、拉杆刚度、竖向层间距、筋材刚度、加筋长度以及墙体高度等因素对上覆荷载下挡墙受力机制的影响.研究结果表明:端板埋深、筋材刚度、连接件层间距,以及加筋长度等对连接件荷载分担比影响不大,而拉杆刚度增大使得连接件荷载分担比增大明显;组合墙面水平荷载随挡墙高度的增加而增大,可采用朗肯主动土压力计算;挡墙工作状态时连接件荷载分担比随连接件与筋材刚度比的增大而增大,当刚度比达到8.6时,连接件荷载分担比约为60%,并趋于稳定.A three-dimensional numerical modelling of a reinforced soil retaining wall（ RSW） with flexible / rigid facings was established based on the results of centrifugal model tests. The influence of different anchor embedded depths,anchor stiffness,vertical spacing of anchor layers,reinforcement stiffness,reinforcement length,and wall height on the mechanical performance of the wall under the surcharge loads was analyzed. The results show that the bearing ratio by the anchors is little affected by anchor embedded depth,reinforcement stiffness,anchor layer spacing,and reinforcement length,but increases significantly with the anchor stiffness. The horizontal forces acting on the combined wall facings increase with the wall height and can be calculated according to the Rankine active earth pressure theory. When the wall is under working stress conditions,the load undertaken by the anchors increases with the ratio of the anchor stiffness to the reinforcement stiffness,and when the stiffness ratio exceeds 8. 6,the bearing ratio by the anchors reaches about 60% and then tends to be stable.

关 键 词：加筋土挡墙 刚/柔性组合墙面 数值模拟 离心试验 受力分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]