路基拓宽段差异沉降数值模拟  

Numerical Simulation on Different Settlement of Embankment Widening

作　　者：柳伟 席强伟[2] LIU Wei;XI Qiangwei(Institute of Civil and Architecture Engineering,East China Jiao Tong University,Nanchang 330013,China;Department of Civil Engineering,Jiangxi V ＆ T College of Communication,Nanehang 330013,China)

机构地区：[1]华东交通大学土木建筑学院,南昌330013 [2]江西交通职业技术学院建筑工程系,南昌330013

出　　处：《交通科技》2018年第3期46-49,共4页Transportation Science & Technology

基　　金：江西省交通运输厅科技项目(2014Y0008);江西省教育厅科学技术研究项目(GJJ151421)资助

摘　　要：为研究高速公路路基拓宽段的差异沉降,利用FLAC3D软件研究了路基加筋、路堤高度、加筋层数、筋材弹性模量等因素对路基差异沉降的影响。结果表明,在新老路基拼接处设置土工格栅,可有效减小新老路基间的差异沉降;随着填筑高度的增加,路基的差异沉降明显增加;在路基拓宽工程中,铺设多层土工格栅可减少路基的差异沉降;随着土工格栅弹性模量的增加,也能有效地减少拓宽路基的差异沉降。In order to study the differential settlement of the widening section of the highway subgrade,the influence of subgrade reinforcement,embankment height,reinforcement layer number,andelastic modulus of reinforcement on subgrade differential settlement was studied by FLAC3 D.The results show that,when the geogrid is set up at the joint of the new and old subgrade,it can effectively reduce the different settlement between the new and old road bases.With the increase of the height of filling,the differential settlement of the subgrade is obviously increased.In the subgrade widening project,laying the multi-layer geogrid can reduce the differential settlement of the subgrade.And with the increase of the elastic modulus of the geogrid,the differential settlement of the widening subgrade can also be effectively reduced.

关 键 词：红黏土 路基拓宽 差异沉降 

分 类 号：U416.1[交通运输工程—道路与铁道工程]