-120-高速公路路基拓宽变形规律及对路面结构影响分析张素霞（山西辰润交通科技有限公司，山西晋中030600）摘要：以山西晋中高速公路工程改扩建为研究对象，采用大型有限元软件ABAQUS建立数值分析模型，分析了路基拓宽填筑过程中变形规律，并重点研究了路基拓宽稳定后的路面结构变形特性，得到结论：填筑后的路基最大水平位移发生在新路堤边坡坡脚下面，新旧地基交界面、新路基与地基交界面均出现水平位移变形集中现象；随着新路基的填筑高度不断地增大，新路基沉降不断增大，且随着路基填筑高度的增大，对旧路基影响也逐渐增大，旧路基附加沉降逐渐增大；路基拓宽变形稳定后，水平位移从旧路基顶面中心到旧路基的顶面边缘基本呈线性增大，最大水平位移发生在新旧路基交界处，新旧路基会发生差异沉降，离旧路基中心越远，沉降越大。关键词：公路路基；拓宽；变形规律；数值分析中图分类号：U416.1文献标识码：BAnalysisondeformationlawofhighwaysubgradewideninganditsinfluenceonpavementstructureZHANGSuxia（ShanxiChengrunTransportationTechnologyCo.,Ltd.,ShanxiJinzhong030600China）Abstract:Takingthereconstructionandexpansionofhighwayengineeringastheresearchobject,thenumericalanalysismodelisestablishedbyusingthelarge-scalefiniteelementsoftwareABAQUStoanalyzethedeformationlawintheprocessofsubgradewideningandfilling,andfocusonthedeformationcharacteristicsofpavementstructureaftersubgradewideningandstability.Thefollowingconclusionsareobtainedthatthemaximumhorizontaldisplacementofthefilledsubgradeoccursbelowthetoeofthenewembankmentslope,theinterfacebetweentheoldandnewfoundationhorizontaldisplacementanddeformationconcentrationoccursattheinterfacebetweennewsubgradeandfoundation.Withtheincreasingfillingheightofthenewsubgrade,thesettlementofthenewsubgradeincreases,andwiththeincreasingfillingheightofthesubgrade,theimpactontheoldsubgradealsoincreasesgradually,andtheadditionalsettlementoftheoldsubgradeincreasesgradually.Afterthesubgradewideningdeformationisstable,thehorizontaldisplacementincreaseslinearlyfromthetopcenteroftheoldsubgradetothetopedgeoftheoldsubgrade.Themaximumhorizontaldisplacementoccursatthejunctionoftheoldandnewsubgrade,andthenewand...
