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ID:34577873
大小:5.23 MB
页数:89页
时间:2019-03-08
《东北季节冰冻地区公路冻胀与翻浆病害分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、AbstractSoilmoisture-heatchangeandthestressredistributioncausedbyitarethemainfactorscausingtheheavingandboiling.BasedontheroadofBeian-Heihe,Yincun-SuihuaandLinkou-DaluomiofJi-NeinHeilongjiangprovince,thispaperadoptedthemethodoffieldinvestigationandfinit
2、edifferencenumericalcalculationandstudiedantifrostboilroadstructureintheseasonalfreezingregion:1)Basedontheformerresearchresults,combinedwiththerealtimemonitoringoftemperatureandmoistureofthetypicalsections,weanalyzedfrostheavingandpumpingmechanismfromt
3、hepointsofviewofhydrothermalchangesofsubgrade,whatismore,theeffectfactorsofroadfrostheavingmechanismwerecarriedonthedetailedanalysis.Bythemethodofsiteinvestigationanddatacollection,weinvestigatedthenaturalenvironmentalcharacteristicsandroadbeddiseasesof
4、thetypicalsectionsoftheexistingroadinHeilongjiangareas.Theroadbeddiseasewereclassifiedconsideringthenaturalenvironmentcharacteristicsandthecharacteristicsoffrozensoilonasphaltroadfrostheavingpumping.2)Isummarizedthetypicalroadstructureofseasonalfrozenso
5、ilareaathomeandabroad,andanalyzedtheadvantagesanddisadvantagesofthem.Basedontheroadfrostheaveandfrostboilmechanism,Iputforwardanewroadstructurefromthesubgradefillingsubgradecross-sectionform,anddrainagedesignandsoon.3)Basedonthecontrolequationoftemperat
6、urefieldwithphasechangeinthefrozensubgrade,takingintoaccountthemoisturemigrationcontrolequationofpermafrostsubgrade,Iputforwardthepermafrostsubgradedeformationmodelcalculationmethodbybuildingthemodelsofcoupledthermo-hydro-mechanical(THM)usingthefinitedi
7、fferencemethodFLAC3D.4)Bybuildingthenumericalmodelwhichconsideredtheinfluencesontemperaturefieldanddeformationfieldgroundwaterbroughtfortheroadsettingupwaterproofpad,Ianalyzedtheinfluenceofmoistureonthechangecharacteristicsoftemperaturefieldanddeformati
8、onfield.TheresultsshowedthatsettingwaterproofcushioncouldweakentheII万方数据effectofgroundwateronthefreezing–thawingdeformationofroad.5)Thispaperestablishedthenumericalmodelofinsulationboardofdifferentembeddingpositiontothedeformatio
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