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1、IIIEuropeanConferenceonComputationalMechanicsSolids,StructuresandCoupledProblemsinEngineeringC.A.MotaSoareset.al.(eds.)Lisbon,Portugal,5–8June2006Numericalevaluationofboredpilesintropicalsoilsbymeansofthegeo-technicalengineering“GEO4”FineSoftware*†‡‡Anjos,G.J.M.,Cunha,R.P.,Kuk
2、lik,P.,Miroslav,B.*FederalUniversityofPará,Belém,Brazilanjosmiranda@pop.com.br†UniversityofBrasília,Brasília,Brazilrpcunha@unb.br‡CzechTechnicalUniversity,Prague,CzechRepublickuklikpa@mat.fsv.cvut.cz;broucekm@mat.fsv.cvut.czKeywords:Back-analysis,BoredPile,DrilledShaft,Geo4(Pi
3、le),Mohr-Coulombfailurecri-terion.Abstract:Thispaperpresentsbackanalysisoffieldloadingtestsinboredpileanddrilledshaftper-formedonthetropicalsoilattheexperimentalresearchsiteoftheUniversityofBrasilia.ThenumericalsimulationwascarriedoutusingthecommercialsoftwareGEO4fromFINEInc.T
4、hissoftwarecomputestheload-displacementcurveonthepileheadandthedistributionofnormalandshearforcesalongtheshaft.Theshearbehaviorofthepile-soilinterfaceisde-scribedaccordingtoamodifiedMohr-Coulomb’stheory.Thispaperalsofocusesonthede-terminationofparametersofstrength(anglefrictio
5、nandcohesion)andsettlement(Youngmodulus)fordeepfoundation.TheuseofGEO4forfoundationdesignisexplainedindetailsherein.Cohesionwasverifiedtobeofimportanteffectwhencalculatingtheshaftstrength.Moreover,fewresearchtopicsnowadaysdealwiththedeterminationofthisparameterforboredpiles.Th
6、eassessmentofgeotechnicalparametersisavitalcomponentofgeotechnicaldesignandsomeformulationsarealsopresentedforthisevaluation.AnjosG.J.M.,CunhaR.P.,andKuklikP.1INTRODUCTIONFoundationandinsitutestingaretwodemandingresearchtopicsattheBraziliancapital,Brasilia.Thiscitywaspre-desig
7、nedandbuiltintheearly60’stohousethemainGovernmen-taladministrativeinstitutionsanditspublicemployees.Brasiliahasincreasedandisstillex-pandingmorethaninitiallyforecasted,thusenhancingtheneedofengineeringsolutionsforthelocaldeepfoundationproblems.Theseproblemsareassociatedwithsom
8、eparticularchar-acteristicsofthepredominantsubsoiloftheFedera
