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1、Availableonlineatwww.sciencedirect.comComputersandGeotechnics35(2008)637–643www.elsevier.com/locate/compgeoTechnicalCommunicationThree-dimensionalnonlinear?niteelementmodelingofcompositefoundationformedbyCFG–limepilesJun-JieZheng*,SariW.Abusharar,Xian-Z
2、hiWangInstituteofGeotechnicalandUndergroundEngineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,ChinaReceived15March2007;receivedinrevisedform7October2007;accepted8October2007Availableonline28November2007AbstractCement–Flyash–Gravel(CFG)pile
3、isawidelyusedgroundimprovementtechnique.ACFG–limemulti-pilecompositefoundationisanewconceptutilizingCFGandlimepiles.Thisstudypresentstheresultsof?niteelementanalyzesusingANSYSsoftwaretoinves-tigatethebehaviorofcompositeCFG–limepilefoundationsundervariou
4、sloaddistributions.Theparametersstudiedincludethelengthanddiameterofpilesandthethicknessofthecushion.Thestressdistributionbeneaththecompositefoundation,thein?uenceofthecushiononload-settlementbehavior,andtheratioofstressesinthepilestothoseinthesubsoilar
5、ealsostudied.Theresultsshowthatsettlementismuchmoresigni?cantlya?ectedbythelengthanddiameteroftheCFGpileratherthanthatofthelimepile.ThissuggeststhattheCFGpileindeedactsasasettlement-reducingpile,whichisinaccordancewiththeworkingprincipleofsuchcompositef
6、oun-dations.Ontheotherhand,theloaddistributionbetweenpilesandsubsoilissigni?cantlya?ectedbythecushionthickness.ó2007ElsevierLtd.Allrightsreserved.Keywords:CFG–limepiles;Compositefoundation;FEM;Settlement;Stressratio;Elasto-plasticity1.Introductionstrata
7、.Consequently,thestrengthandsti?nessoftheshal-lowsoilstratacanbeimprovedandutilizedtogetherwithInpast10years,compositefoundations,especiallymulti-contributionfromthedeepersoilstrata.pilecompositefoundationshavebeenextensivelyused.Inrecentyears,asubstant
8、ialamountofresearchhasMulti-pilecompositefoundationisamethodofgroundbeenconductedonmulti-pilecompositefoundations.Forimprovementthatinvolvesusingdi?erentpiletypeswithdif-instance,Liuetal.[2]andChenetal.[3]performed?eldferentlengt
