上覆硬殼層軟土地基的工程特性試驗(yàn)研究及數(shù)值分析.pdf

1、⑧申請(qǐng)同濟(jì)大學(xué)工學(xué)碩士學(xué)位論文上覆硬殼層軟土地基的工程特性試驗(yàn)研究及數(shù)值分析培養(yǎng)單位：一級(jí)學(xué)科：二級(jí)學(xué)科：研究生：指導(dǎo)教師：土木工程學(xué)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