复合地基的褥垫层设计

2003-07-ll2002l008l970-l947-25320043JournalofNortheasternuniversityNaturalscienceVol.25No.3!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Mar.2004l005-3026200403-0287-04ll0004TerzaghiTu473A2070l!67l893l03l1Fig.1Failuremodelsofcushionlalblc2IrIrcrlllIr!IrcrIrIrcrIr=E2l+Uc+gtanlEUcpsfOs=psflIr=El+Upsftan2Ircr=l2e3.3-.45BLcot45-23BLB=LEl+Upsftan!e2.85cot45-2449Op!l+tan2gngOs5OpOsgg=l+tanng554532h/!hh/hMandelSalencon7Terzaghi92Fi9.2SliPPin9failuremodelofcushion2aTerzaghiTerzaghil23Ad3r=d2cos3Terza9hiFi9.3Terza9hiProblemAdr=d2cosXe6tan6ABOBAdOBy=d2cosXe6tanXsin+67yy/=6=!26h/=.5de!2tanh/88225MandelSalencon11C=cN/c+CN/C+12!BN/!8h/Terzaghi10C=cNc+CNC+12!BN!989N/cN/CN/!NcNCN!MandelSalenconTerzaghic45MandelHB=0.2100mm400mm30MandelTerzaghiMandelSalenconHBHBH!1.3BH1.39CFG133004Terza9hiFi9.4Bearin9coefficientsbyTerza9hi5MandelFi9.5Bearin9coefficientsbyMandelmm9.5250mm12.6h/h/4B/=B+2Htan#/+C10C200mmB/H1058160m10m2!3mfk=90kPa1.5!2mfk=200kPafk=100kPaCFGfSpk=200kPaE=29MPa$=0.354tane2.85cot45-2#E1+$pSf=179#28.6H/=d2e2tan=444mmB/=B+2Htan/+C=10.68mL/=L+2Htan/+C=180.68m9823350mm61~ugesJM0WithersNJ.ReinforcingsoftcohesivesoilsWithstonecolumnsJ.GroundEngineering19747342-49.2Rathmayer~GSaariK~0.GoughnourRR.SettlementofverticallyloadedstonecolumninsoftgroundA.Procof8thEuroPeanConferenceonSoilmechanicsandFoundationEngineeringImProOementofGroundC.RotterdamBalkema1983.235-240.3EngelhardtKGolding~C.FieldtestingtoevaluatestonecolumnperformanceinaseismicareaJ.GeotechniCue197525161-69.4BouassidaM.BearingcapacityofafoundationrestingonasoilreinforcedbyagroupofcolumnsJ.GeotechniCue199545125-34.5RandolphMFWrothCP.AnalysisofdeformationofverticallypilesJ.JofGeotechnicalEngineering197810421465-1488.6LeeCY.Settlementofpilegroups-practicalapproachJ.JofGeotechnicalEngineering199311991449-1461.7J2003245491-494WangFCZhuFSWangXC.TheoreticalanalysisonthemodulusofconstructioncompositefoundationJ.JournalofNortheasternUniOersityNaturalScience2003245491-494.8J200131119-11ChiYJShenWSongEX.DiscussiononpilesoilrelationshipbetWeenfailuremodelofcushionandstressratioJ.IndustrialConstruction200131119-11.9J19991224-26WangNY.TheoreticalanalysistocushiondesignofcompositefoundationJ.BuildingStructure19991224-26.10VesicAS.AnalysisofultimateloadsonshalloWfoundationJ.ProcASCE197399SM1565-582.11VesicAS.ExpansionofcavitiesininfinitesoilmassJ.ProcASCE197298SM3265-290.12M2000.345-400@ianJ~YinZZ.Soilmechanicsandca[e-mail]-gradeconcretepileandvibro-castingsand-gravelcompositefoundationJ.BuildingStructure1999842-51.CushionDesignofCompositeFoundationWANGFeng-chiZ~UFu-shengWANGShu-hongDONGTian-wenSchoolofResourses&CivilEngineeringNortheasternUniversityShenyang110004China.CorrespondentWANGFeng-chiE-mailSy998!etang.comAbstractInordertodeterminethecushionparametersindesigntherelationshipbetWeenreinforcementsandcushioncanbeconsideredasthatthegroundisundertheactionofinvertedpiles.TheupWardpenetrationofpilesintocushionislikelytoleadthecushiontosuchfailuresasmonolithicshearpartialshearfailureandpiercingfailures.Amongthemtherationalmodelthatcanadjustthepile-soilstressratioismonolithicshearfailure.Basedonthemodelaniterativeformulaofupperlimitvalueintermsoftheinternalfrictionangleofacushionhasbeenderived.AccordingtoTerzaghifstheoryofslippingspiralsitisprovedthatthecushionthicknessshallbetheminimumonetosetifthelogarithmicslippingspiralsintersecttangentiallythebottomboardoffoundation.Asaresulttheadjustabilityofpile-soilstressratioWillbedecreasedifthecushionthicknessislessthantheminimumonetosetandthecushionWidthtosetshouldbegivenonstressdiffusionbasissoastopreventthecushionfromfailure.KeywordscompositefoundationpilecushionfailuremodelslippingspiralstressdiffusionReceiOedJuly11200309225复合地基的褥垫层设计作者：王凤池，朱浮声，王述红，董天文作者单位：东北大学资源与土木工程学院,辽宁,沈阳,110004刊名：东北大学学报(自然科学版)英文刊名：JOURNALOFNORTHEASTERNUNIVERSITY(NATURALSCIENCE)年，卷(期)：2004,25(3)被引用次数：9次参考文献(13条)1.EngelhardtK;GoldingHCFieldtestingtoevaluatestonecolumnperformanceinaseismicarea1975(01)2.RathmayerHG;SaariKHO;GoughnourRRSettlementofverticallyloadedstonecolumninsoftground19833.岂连生低强度混凝土桩与振密砂石桩复合地基试验与研究1999(08)4.钱家欢;殷宗泽土工原理与计算20005.VesicASExpansionofcavitiesininfinitesoilmass1972(98)6.VesicASAnalysisofultimateloadsonshallowfoundation1973(99)7.王年云复合地基上褥垫层设计的理论分析1999(12)8.池跃君;沈伟;宋二祥垫层破坏模式的探讨及其与桩土应力比的关系[期刊论文]-工业建筑2001(11)9.王凤池;朱浮声;王晓初复合地基复合模量的理论修正[期刊论文]-东北大学学报(自然科学版)2003(05)10.LeeCYSettlementofpilegroups-practicalapproach1993(09)11.RandolphMF;WrothCPAnalysisofdeformationofverticallypiles1978(02)12.BouassidaMBearingcapacityofafoundationrestingonasoilreinforcedbyagroupofcolumns[外文期刊]1995(01)13.HugesJMO;WithersNJReinforcingsoftcohesivesoilswithstonecolumns1974(03)引证文献(9条)1.袁光碧储油罐CFG桩复合地基工程质量监督要点分析[期刊论文]-天然气与石油2011(1)2.刘守军浅论CFG桩[期刊论文]-北方交通2009(3)3.张慧乐.刘尊平.朱金泰CFG桩复合地基极限承载力计算模型及其验证[期刊论文]-岩土工程技术2008(5)4.王凤池.翟华.吕毅兰.燕晓.刘涛素混凝土桩复合地基在水平荷载作用下的工作性能[期刊论文]-沈阳建筑大学学报（自然科学版）2008(4)5.郑俊杰.陈健.骆汉宾.鲁燕儿刚性桩复合地基垫层破坏模式及厚度分析[期刊论文]-华中科技大学学报（自然科学版）2008(7)6.吕志忠.曹国华复合地基褥垫