上覆硬殼層軟土地基的工程特性試驗研究及數(shù)值分析.pdf

1、⑧申請同濟大學工學碩士學位論文上覆硬殼層軟土地基的工程特性試驗研究及數(shù)值分析培養(yǎng)單位：一級學科：二級學科：研究生：指導教師：土木工程學院土木工程巖土工程梁永輝周健教授二Oo七年三月AbstractABSTRAeTDuringtheconstructioninchineselitto腳andinlandareas，itwasalwaysfoundthattherebeenonelayerofcrustwithhigherstrengtha

2、ndlowercompressionuponthesoftclayIfthislayerofcrustcallbereasonablyused，itwillgreatlydecreasetheprojectcostHowevertheworkingmechanism“ofcrustanditsloadwdeformationfeaturehasnotyetbeenstudieddeeplyandsystematically。Inther

3、ealprojects，thefunctionofcrustwasalwaysignored，andSOcausedgreatwaste，So，inthispapertheengineeringfeaturesofstressdistribution、loaddeformation、consolidationsettlementandSOall，willbeanalyzedsystematicallybYmeansofindoormod

4、eltestsandnumericalstudyAtfirstthestressdistributioncharacteristicofsubsoilwithuppercrustwasstudiedbyFEMmethodAndtheeffectsofdifferentparameters(thethicknessofcrust、loadingwidth、rigidnessofcrustandPoisson’Sratio)onstress

5、distributionweregainedThen，asetoforthogonalindoormodeltestswerecarriedout，andalsoelastoplasticanalysisbYFEMwasperformedtostudytheloadbearingmad●deformationfeaturesofthiskindofsubsoilandtheeffectsofdifferentparametersonit

6、sfailure、mode，andsomequalitativeandquantitativeconclusionwereachievedInaddition，effectsofcrustonsoilconsolidationsettlementwereseldomstudiedbydomesticandabroadresearchers。Inthisresearchproject，anonedimensionalfiniteeleme

7、ntmodelandalsoaplanestrainfiniteelementmodelwasdevelopedinABAQUSprogramtoanalyzetheconsolidationsettlementfeaturesofthiskindofsubsoil，Duringtheanalysis，thecamclaymodelwasusedandthenonlinearfeaturewasconsidered，todescribe

8、therealpropertiesofsubsoil。Somerulesandlawsofconsolidationsettlementwereconcluded。Inthefinali移，furtherstudiesrequiredbytheseproblemsarediscussed。KeyWords：subsoil謝tlluppercrustindoormodeltest，F(xiàn)EM，stressdistribution，load—b