軟土中樁—沉箱逆作法復(fù)合基礎(chǔ)模型試驗研究.pdf

1、東南大學(xué)碩士學(xué)位論文軟土中樁—沉箱逆作法復(fù)合基礎(chǔ)模型試驗研究姓名：高芬芬申請學(xué)位級別：碩士專業(yè)：土木工程指導(dǎo)教師：龔維明20090505ABSTRACTModelTestsandStudyOnPilecaissonCompositeFoundationConstructedbyTop—downMethodinSoftSoilABSTRACTThissubjectisrelyingontheNationalHighTechnologyDe

2、velopmentPlanProjects(863plan)(projectnumber2007AAIIZ102)，andtheengineeringbackgroundofthesubjectiscrossseachannelconstnlctionofQiongzhouStrait，furtherdiscussthestressmechanismofbridgecompositefoundationconstructedbytopd

3、ownmethodinde印softfoundationWithindoormodeltestthebearingperformanceofthepilecompositefoundationconstructedbytopdownmethodundertheverticalloadisstudiedThemainworkandconclusionsareasfollows：Sumsupthecurrenttheworkperforma

4、nceandloadtransfermechanismofpilefoundationmakescleartheworkperformanceofcompositefoundationconstructedbytopdownmethod，andthetopdownpilesconstructionisdividedintothreesteps：shallowfoundationstage，compositesoilstageandcom

5、positepilefoundationstageThepaperdesignsthemodeltestontopdownpilesconstructionThisincludesthecalculationofsimilarityscaleonpile，theselectionofpilemodel，thelayoutofdataline，thepmtecfionofstraingauge，reasonablechoiceandere

6、ctioninstruments，elcAftertesting，areliableexperimentaldataisobtainedThroughresearchingontheresultofthemodelteststudyontopdowncompositefoundationtheloadtransfermechanismundertheverticalloadofpile，seriesofpilecap，twopileca

7、p，andfourpilecapaleresearchedandmainlyanalyzestheloadsaredistinctlysharedbetweensoilandpilesaftersealingpile，SOmeguidanceconclusionsalegivenEventuallybyusingFLAC3Dprogramtoanalyzethetopdowncompositefoundationunderthevert

8、icalloadandcomparingwithtestingdataandalsoanalysesthechangelawofbearingperformance，loadratiobetweenpileandsoilandsettlementunderdifferentparameters(pilelengthdistancediameterratio，thetimeofpressingandsealingpile)Somevalu