打樁過程中樁周土體的固結(jié)特性研究.pdf

1、天津大學(xué)碩士學(xué)位論文打樁過程中樁周土體的固結(jié)特性研究姓名：徐亞軍申請學(xué)位級別：碩士專業(yè)：巖土工程指導(dǎo)教師：閆澍旺20080501ABSTRACTWhentheBuildinggroundsubgradesoilwhichdonotmeetthegroundbearingcapacityanddeformation，yetnotdemandthesubgradetreatmentThen，usedeeplevelfoundationfir

2、mstratumorrockformationtosubgradesupportingcourseAdoptdeepfoundationversiondeepfoundationincludepilefoundation，wellfoundation，Diercapandcontinuousconcretewall，theuseofmostfrequentispileroundionWhilecrowdedsoilpilebypress

3、insolum(eg，ifstiffinesstenaciousclay、looseningunconsolidatedsilt，siltyclay)，arounddowelwillyieldingcrowdedt嘶torieseffect。arounddowelsolumwillyieldingmorestressanddisplacement，becausethedowelclampon，closepilebodydepartmen

4、tthesolumsoilstheextrusionforcemaximalinstantformationpolaraltitudeporewaterpressure，atthemeantimesoilskeletonsoilsdrasticsqueezing，SOthatsolumyieldingmanyhorizontaldirectionorverticalsplit，solumconstitutionwhollybreakdo

5、wnWithtimeincrease，solumoccurrenceconsolidation，excesshydrostaticpressuregradualslaking，theshearstrengthofsolumgradualrecoverybecausehavesplit，theconsolidationspeedofsolumfasterthantheconsolidationspeedofflawlesssolum，So

6、，finddosingevaluationdrivingpilemakingaroundsolumconsolidationisademandedsolutionthesubjectmatter。AlsoarealityimportantsubjectTbis砸icleprimoonthebaseofthelanestrainstatecircularapertureexpansiontheoryestablishmentspaceeq

7、uilibriumdifferentialequationsset，thendefinethestressboundaryconditioninplasticzone，adoptMohrCoulombyieldcriterion，tosolutionequationsset，deduceholeexpansionprovokearoundsoilstressdistributionuniontheconsequenceofcircula

8、rapertureexpansiontheoryandHenkelporewaterpressurecalculationequationThen，CandeducethecalculationmethodofporewaterDressuredistributionAccordingtohydraulicpowercracktheorywhilesoilunitelementwaterpressure(hydrostatic—pres

9、sureandexcesshydrostaticpressure)surpassaroundrestrainpressureforce，soiloccurrencesplitAccordingtocircularapertureexpansiontheoryandhydraulicpowercracktheoryobtaintheconditionsofappearsplitBecausetheexistenceofsplitinthe