楔形樁的承載性能研究.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文楔形樁的承載性能研究姓名：王巧娜申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：王幼青20050601墜查堡三些查莖三差堇圭耋堡鎏蘭AbstractWithavaryingperimeteralongallorpartoftheirlengthtaperedpilesaredifferentfromcylindricalpilesandtheirsidefaceisunusualTherehavebeenmanyfi

2、eldtestsbywhichthebearingcapacityoftaperedpileswasprovedtobehigherthanthatofpileswithequalcross—sectionInthispapercalculationmechanicsmodelfortaperedpilesbyfiniteelementmethodisestablished，takingintoaccountthecharacteris

3、ticsoftaperedpilesFEMisadoptedinestablishingthemechanicsmodel，consideringthepilesoilsystemasawholebodyConsideringthesymmetryofthewholesystemandloaddistribution，planeaxi—symmetricisoparametricelementisadoptedtoanalyzethem

4、odelThemodelincludesthreeparts，thatis，pile，soilandinterfacebetweenpileandsoilInordertoexpressthestressanddeformationofthesurroundingsoilbodythemeshextendsto20timesofpiletopradius，TheinterfacebetweenpileandsoilisGoodmanel

5、ementwhichCansimulatetheinconsistentdeforrnationandtransfershearstressandnormalstressBecauseofthespecialgeometricdimensionandfunctionalmode，soildeformationmodulusandultimatesideresistancearemodifiedrespectivelyaccordingt

6、osoilporosityandradialstressByusingthemodelestablishedinthispaperdifferenttaperedpileswithdifferenttaperedanglesarecalculatedandanalyzedTheirload—settlementcurvesandaxialforcedistributionarealsosimulatedtoverifythevalidi

7、tyofthemodelTheinfluenceofdisplacementeffectoftaperedpileonbearingcapacityisanalyzedindetailtoshowthebearingmechanismthatshearstrengthofsoilsurroundingpileisincreasedduetodisplacementeffectoftaperedpileBearingbehaviorana

8、lysisoftaperedpileiscarriedoutTheinfluenceoftaperedanglemodificationonbearingbehaviorinlargediameterandsmalldiametercasesisdiscussedComparedwithbearingbehaviorofnormalpiles，theadvantageoftaperedpileoverequaldiameterpilei