路堤荷載下剛性樁復(fù)合地基的荷載傳遞性狀與變形規(guī)律研究

1、Y1638518—ⅡⅡ!二一自g：——鹽Ⅱ一UDC—jx一≠目：—監(jiān)Ⅱn東南大學(xué)碩士學(xué)位論文路堤荷載下剛性樁復(fù)合地基的荷載傳遞性狀與變形規(guī)律研究研究牛姓名：吉國(guó)元導(dǎo)師姓名：割撻玉煎授巾請(qǐng)學(xué)位級(jí)別—j二生j薹_一學(xué)科專(zhuān)業(yè)名稱—主二■墨一皓丈提蹙日期～墊盟生L且塑且淪女菩辯月斯』鯉魚(yú)生呈且!L且學(xué)位授予單位—|L直』L堂學(xué)位授干l’捌上Lj已—且—且菩辯委員會(huì)土席j割生業(yè)—藍(lán)iL汗矧人—蘭韭業(yè)—藍(lán)授—湛握疊—越授_AbstractRigid

2、pileshavebeenwidelyappliedinthesoftgroundimprovementofhighwayengineeringinchin亂Thebearingmechanismanddeformationruleofrigidpilecompositefoundationhavealsobeende印lydiscussedandabundantachievementshavebeenobtainedBasedonth

3、eseresearchthispaperaims砒analyzingthecharacteristicsofrigidpilecompositegroundunderemhankmembyfieldexperimentsnumericalsimulationendtheoreticalanalysisThemainconclusionsofthispapera糟asfollows：O)Thestateofrigidpilecomposi

4、tegroundisreviewedDriveneffectofnondisplacementconstructiontechniquesissummarizedmanyrelativestudiesonbearingcapacityanddeformationforthekindofpileunderembankmentaresummedI|p，thentheproblemsthatshouldbefurthersolvedandth

5、enextresearchgoalareintroduced(2)Bytheanalysisoffieldexperimentduringpiledriventhedisturbanceofrigidpilecons協(xié)dcfiononsoilsaroundpilesundernon=displacementa“investigatedforsinglepileandpilegrouptheobserveddatashowthatpile

6、group’sdriveneffectisacomprehensiveresultofeverysinglepileStaticpenetrationtestsatdifferenttimeshowthatthesoilstrengtharoundpilehasagreatdeclinebutgradualelevationwiththedevelopmentoftimepilegroup’sdisturbanceeffectismor

7、enotablethanthesinglepile’sWmltheembankmemaddedandremovedsoilsUengttlaroundpileisenhanced；thecharacteristicsofphysicsandmechanicsgetaremarkableimprovement(3)PlanefiniteelementmethodffEM)isintroducedtoinvestigatebearingme

8、chanismofrigidpilecompositegroundunderembankmentSoilarchingeffectmembraneeffectendpilestressconcentrationatehighlightedandtheroleofpilecapinthecompositegroundisanalyzedbytheequivalenttreatmentareaofsinglepilewithpilecapa

9、nequationcomputingthestressratiobetweenpileandsoilisintroducedthecontrastbetweentheparameteranalysisandFEMresultshowsuchanequationhasitsrationality(4)BythemeansofplaneFEM，thesettlementruleofrigidpilecompositegroundisdisc

10、ussedthesettlementresponsesofthegroundunderthedifferentparametersarestudiedthesepmamatorsarecomprisedbyeverymaterialmodule，pilecapsizepiledistance，pilelengthandsoonmeanwhile，pilewithcaporwithoutareanalyzedtheresultsshowt

11、hatto詛Isettlementonlyhasamoreorlessvarietyunderalowermoduleofsublayersoilbythechangeofpilecaporpiledistance，Inthisc峨embankmentsettlementaRerco刪onshouldbemainlycontrolledbypilelength，whenthesublayerhasagreatmodule，theadju

12、stmentofpilecap，piledistanceandpilelengthallhaveasignificantinfluenceonthetotalembankmentsettlement(5)Aprimarydiscussiononthesettlementcalculationforrigidpilecompositegroundunderembankmentisputforwardtwocalculationmethod

13、sareanalyzednamelycompositemodulemethodandthemethodofsubsoilstressaroundpileBycontrastwithfieldobservationandFEMtheresultshowsthatbothmethodshaveflexibilitybutthelatterisb@ttorclosedtoactualresult(6)Theobservedresultsfro

14、mtwoexperimentareasaleanalyzedincludingCFGpileandPTCpilewithpilecaptheeffectofreinforcementonthesea璋鵠areevaluatedendcomparedandtheresultssuggestthatthereinforcementeffectofPTCpileisbetterthanCFGpile∽Themethodsofcalculati

15、ngbearingcapacityforrigidpilecompositegroundpresentedinthepapermarearatiomethodandstressratiomethodBycontrastwithstaticloadexperimentofsinglepilecompositegroundforCFGpilebothmethodshavesomeprecisionInadditionharnessingth

16、eresultofstressratiomethod齟ultimateembankmentheightcallbecomputedonlyiftheultimatebearingcapacityofsubsoilcouldbeknownbystaticloadexperimentorarearatiomethodKeywords：rigidpile；con剛nlcd∞disturbance；pilecap；embankment；bear