Three-dimensional nonlinear finite element modeling

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1、Availableonlineatwww.sciencedirect.comComputersandGeotechnics35(2008)637–643www.elsevier.com/locate/compgeoTechnicalCommunicationThree-dimensionalnonlinearfiniteelementmodelingofcompositefoundationformedbyCFG–limepilesJun-JieZheng*,SariW.Abusharar,Xian-Z

2、hiWangInstituteofGeotechnicalandUndergroundEngineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,ChinaReceived15March2007;receivedinrevisedform7October2007;accepted8October2007Availableonline28November2007AbstractCement–Flyash–Gravel(CFG)pile

3、isawidelyusedgroundimprovementtechnique.ACFG–limemulti-pilecompositefoundationisanewconceptutilizingCFGandlimepiles.ThisstudypresentstheresultsoffiniteelementanalyzesusingANSYSsoftwaretoinves-tigatethebehaviorofcompositeCFG–limepilefoundationsundervariou

4、sloaddistributions.Theparametersstudiedincludethelengthanddiameterofpilesandthethicknessofthecushion.Thestressdistributionbeneaththecompositefoundation,theinfluenceofthecushiononload-settlementbehavior,andtheratioofstressesinthepilestothoseinthesubsoilar

5、ealsostudied.TheresultsshowthatsettlementismuchmoresignificantlyaffectedbythelengthanddiameteroftheCFGpileratherthanthatofthelimepile.ThissuggeststhattheCFGpileindeedactsasasettlement-reducingpile,whichisinaccordancewiththeworkingprincipleofsuchcompositef

6、oun-dations.Ontheotherhand,theloaddistributionbetweenpilesandsubsoilissignificantlyaffectedbythecushionthickness.Ó2007ElsevierLtd.Allrightsreserved.Keywords:CFG–limepiles;Compositefoundation;FEM;Settlement;Stressratio;Elasto-plasticity1.Introductionstrata

7、.Consequently,thestrengthandstiffnessoftheshal-lowsoilstratacanbeimprovedandutilizedtogetherwithInpast10years,compositefoundations,especiallymulti-contributionfromthedeepersoilstrata.pilecompositefoundationshavebeenextensivelyused.Inrecentyears,asubstant

8、ialamountofresearchhasMulti-pilecompositefoundationisamethodofgroundbeenconductedonmulti-pilecompositefoundations.Forimprovementthatinvolvesusingdifferentpiletypeswithdif-instance,Liuetal.[2]andChenetal.[3]performedfieldferentlengt