高速鐵路膨脹土地基沉降控制試驗研究.pdf

1、東南大學碩士學位論文高速鐵路膨脹土地基沉降控制試驗研究姓名：葉瑛申請學位級別：碩士專業(yè)：巖土工程指導教師：薛國亞潘衛(wèi)東20060301東南人學頌_上學位論文ExperimentalStudyonSettlementControlofExpansiveSoilSubgradeofHigespeedRailwayGraduateStudent：YEⅥngAdvisor：ProfXueGuoyaProfPanWeidongAbstractEx

2、pansivesoilexpandswhenencounteringwatershrinksandcraz8whenlosingwateritperformancesbadlyontheengineeringpropertyandwillseriouslyaffectsubgradesettlementThespeedoftrainishigh，tOegstH它佗gularityoftheuppertrackandreducemaint

3、enanceworkload，therequirementsofsettlementafterconstructionofsubgradeareextremelystringenLTomeettherequirements∞adembankmentorsubgradeofexpansivesoilneedstObeimprovedInorderteachthisgoalaseriesofexperimentalstudiesandcal

4、culationhavebeenprocessed：1LaboratoryexperimentshavebeendoneonrepresentativesamplesfromexpansivesoilregionofHeningHigespeedRailwayinthisthesisPhysicalandswellingpropertyparameterssuchasmineralcomposition，liquidlimitplast

5、iclimitfreeswellingratiocationexchangecapaeityateobtainedWhenlimeisused笛stabilizedagenttoimprovedthepropertiesofexpansivesoilcomparephysicalandswellingpropertyofexpansivesoilwithreformativesoil’s’itcarlbe聯(lián)：enthatphysical

6、propertyofmodifiedexpansivesoilisgreatlyimproved，swellingpropertyisprodigiouslyrestrained21nsituswellingforeetestsofsubgradehavebeendoneOffthebasisofdifierentstructuresofroadbedanddifferentswellingpropertiesofsubsoilExpa

7、nsioncharacteristicofexpansivesoilsubgradesuchflSswellingforceswellingcapaeityareunderstanded，whichprovidesgiStforprincipleofsuhgradetreatmentcutreplacementdepthandleastroadbedheight3MethodsforsettlementcalculationsuchaS

8、layerwisesummationmethodempiricalcalculationmethodarcintroducedFinalsettlementcanbecalculatedbyadoptingmethodofexponentorAseokaaccording酗settlementtimecurveSettlementafterconstructioniScalculatedwhichineludesth嗽portions：

9、settlementofmadembankmentundertrainloadsettlementofsubgradeundertrainloadresidualsettlementofsubgradeunderroadembankmentIpad111efrontportionsiscalculatedbylayerwisesummationmethod，theIastportioniScalculatedbyfinalsettlem