高液限粘土路基加宽的有限元分析  

Finite Element Analysis for Embankment-widened Made of High Liquid Limit Clay

作　　者：刘涛 张军 黄博[3] LIU Tao;ZHANG Jun;HUANG Bo(Changde Communication Construction Project Management Co.,Ltd.,Changde,Hunan 415000,Chian;Hunan Lianzhu Highway Construction and Development Co.,Ltd.,Zhuzhou,Hunan 412000,China;Changsha University of Science and Technology,Changsha,Hunan 410114,China)

机构地区：[1]常德市交通建设监理咨询有限公司,湖南常德415000 [2]湖南省莲株高速公路建设开发有限公司,湖南株洲412000 [3]长沙理工大学,湖南长沙410114

出　　处：《公路工程》2018年第5期220-225,265,共7页Highway Engineering

基　　金：湖南省交通运输厅项目(201707)

摘　　要：利用ABAQUS软件建立高液限黏土路基加宽有限元模型,对不同的差异沉降处治方法进行了仿真模拟,分析了从竣工时至工后若干年时路基的应力状态、竖向位移和水平位移的变化情况,结合应力位移云图及沉降位移曲线,获得了改扩建路基的应力应变分布规律和差异沉降变化规律。研究表明,路基拓宽1 a后沉降便已基本稳定,开挖台阶及加设土工格栅可以有效地减小施工时的差异沉降,并在一定程度上减小工后沉降。The Finite Element model of emban km ent-widened made of high liquid limit clay is established by ABAQUS software,and different differential settlement treatment methods are simulated.The stress state,vertical displacement and horizontal displacement of roadbed from completion to a few years after work are analyzed.Combined with the stress displacement cloud map and settlement displacement curve,the distribution rule of stress and strain and the law of differential settlement are obtained.The research shows that the settlement of the subgrade is basically stable after one years of subgrade widening.The excavation step and the addition of geogrid can effectively reduce the differential settlement in the construction and reduce the post construction settlement to a certain extent.

关 键 词：有限元分析 路基加宽 高液限黏土 不均匀沉降 处治方法 

分 类 号：U416.1[交通运输工程—道路与铁道工程]