典型膨胀土路堤边坡失稳机理及控制方法研究  

Study of slope failure mechanism and control method for typical embankment on expansive soil foundation

作　　者：陶连金[1] 沈小辉[1] 夏进平[1] 王开源[1] 侯森[1] 

机构地区：[1]北京工业大学岩土与地下工程研究所,北京100124

出　　处：《铁道建筑》2012年第8期74-77,共4页Railway Engineering

基　　金：国家自然科学基金(40972189);教育部博士点基金(200800050006)

摘　　要：膨胀土路基在受到浸泡后承载力降低极易失稳。本文以广西某高速公路膨胀土路堤边坡为工程背景,采用有限差分软件对路堤边坡的失稳模式进行了模拟分析,结合现场地质条件,分析了膨胀土路堤边坡失稳机理。在此基础上,提出了反压墙和抗滑桩两种不同的路堤边坡加固方法,并基于数值模拟结果进行比选研究,确定了以抗滑桩治理路堤边坡失稳的方法。研究结果可为类似膨胀土路堤工程治理提供借鉴。Expansive soil foundation may easily fail due to its capacity reduction after ground water infiltration. Taking the expansive soil embankment of an expressway in Guangxi province as an example, this paper used finite difference software in modeling the instability mode of embankment on expansive soil foundation and analyzed the instability mechanism of the embankment by field geology investigation. Based on this, this paper presented two reinforcement methods of backfill loading wall and anti-slide pile for the failure embankment, the results of which were compared by numerical modeling, and decided to adopt anti-slide pile as the remedial method for embankment, which can provide reference for similar cases.

关 键 词：膨胀土 数值模拟 反压墙 抗滑桩 

分 类 号：U416.167[交通运输工程—道路与铁道工程] U417.1