斜坡含软夹层地基路堤离心模型试验与数值模拟  

Centrifugal model test and numerical simulation of embankments on sloping ground with weak interlayer

作　　者：刘怡林[1,2] 黄茂松[3,4] 袁伟[3,4] 王浩然[3,4] 

机构地区：[1]交通运输部公路科学研究院,北京100088 [2]交通运输部道路结构与材料重点实验室,北京100088 [3]同济大学地下建筑与工程系,上海200092 [4]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《岩土力学》2013年第S2期22-26,34,共6页Rock and Soil Mechanics

基　　金：西部交通建设科技项目(No.200831822357);国家自然科学基金项目(No.51108215);国家杰出青年基金资助项目(No.50825803)

摘　　要：为了研究斜坡含软弱夹层地基路堤边坡的稳定性及破坏机制,采用离心模型试验和数值分析方法进行了研究。研究表明:斜坡均质地基路堤边坡仍是呈现整体圆弧滑动破坏;而对于含软弱夹层地基路基边坡来说,由于软弱夹层的影响其稳定性有了明显的降低,并有利于张拉裂缝的产生和发展,路堤边坡不再是整体圆弧滑动破坏,而是部分土体沿着软弱夹层发生滑动破坏。The purpose of this study is to investigate the stability and failure mechanism of embankments on sloping ground with weak interlayer. Centrifugal model tests and numerical simulations are conducted;and some useful conclusions are drawn as follows. The failure mechanism of embankments on homogeneous sloping ground is still circular sliding. Due to the effect of weak interlayer, the tensile crack will emerge and develop easily;and the embankment will become more instable and slide along the weak interlayer.

关 键 词：软弱夹层 路堤边坡 稳定性 离心模型试验 数值模拟 

分 类 号：U416.12[交通运输工程—道路与铁道工程]