东北季节冰冻地区公路冻胀与翻浆病害分析

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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