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:1003-4722(2010)02-0052-03(,430056):(120+3180+120)m,Q370qE(14MnNbq),Q345qE,Q235qC,,,,1,:;;;;:U448.121;U442.5:ADesignofSuperstructureofMainBridgeofBinzhouHuangheRiverRail2cum2RoadBridgeZHAOXing2ya(ChinaZhongtieMajorBridgeReconnaissance&DesignInstituteCo.,Ltd.,Wuhan430056,China)Abstract:ThemainbridgeofBinzhouHuangheRiverRail2cum2RoadBridgeisasteeltrussgirderbridgewithspanarrangement(120+3180+120)mandthemajorpartofthegirderisaboltedandweldedstructure.ThemaintrussoftheBridgeisusedwiththeQ370qE(14MnNbq)steel,thefloorsystemsandbracingsystemsareusedwiththeQ345qEsteelandtheauxiliarystructureswiththeQ235qCsteel.Theassemblingtypepanelpointsaredesignedforthetrussgirderofthemainbridge.Thechordsofthemaintrussareofboxsectionswhilethewebmem2bersareoftheboxandI2shapesections.Thepre2camberofthetrussgirderissetbywayofex2tendingorshorteningthepanellengthoftheupperchords.Thefloorsystemsforboththerail2wayandroadwayaremadeupofthestringerandcrossbeamsystems.Attheplanesofboththeupperandlowerchords,thelongitudinalbracingsystemsarearrangedandthediagonalmembersofthelateralbracingsystemsarearrangedinacrisscrossway.Theone2wayerectionmethodischosenfortheerectionofthemaintrussgirder.Withtheexceptionthatthe1stspanofthegirderistobeerectedonscaffolding,therestspansofthegirderarealltobecantileveredlyerectedintheaidofthetemporarypiers.Keywords:rail2cum2roadbridge;trussbridge;steeltrussgirder;structuraldesign;bridgedesign3(5),,,(zxy@)1,205,;,2520102:2009-12-0:198-1980haobrdi.com.cn-()3.3km,2.818km,600m5000m,7000m(120+3180+120)m,781.5m[1]1,,,2122(1):(2):(3):(4):4(5):80km/h(6):20,12033.13.3km,4112.0m,,120140m,160m,180m3,180m,,,,,,,,,,,,,;,,(120+3180+120)m3.3,Q370qE(14MnNbq),Q345qE,Q235qC,,18m,10m,11m37699kN,26.388t,2,800mm,,,,,840mm;1040mm;()1240mm,,(3)4201040mm50mm33.4,()35.2,,,,,,,,26mm,16mm,,2000kN44.12.0m,1.38m,,2,,1,,8,,9444.2,,,,,34,41.7m,0.8m,8,3,21,315,C40,18cm,8cm,,35,5,,51/219.0m,18.0m5,,,,,,2,390mm,,,,,,266.12(),,1,,,,,6.2()(),1120m,180m100m,,,()452010240cm0cm180m11120m100m725(1),(2)(),,,,,:[1]JTJ041-2000,[S].[2].[J].,2006,26(5):37-39.(YIQian.MainTowerBeamConstructionofZhan2jiangBayBridge[J].JournalofChina&ForeignHighway,2006,26(5):37-39.inChinese)[3],.[J].,2002,22(5):44-47.(XIEYuan2sheng,LUShang2wu.ConstructionAppli2cationofFlexibleBraceandJackforObliqueTowerColumn[J].JournalofChina&ForeignHighway,2002,22(5):44-47.inChinese)[4],,.[J].,2007,(5):66-68.(LIUWen2hui,WANGFeng2guo,XINWei.Simula2tionAnalysisofConstructionControlofPylonofaSinglePylonCable2StayedBridgeWithoutBackstay[J].BridgeConstruction,2007,(5):66-68.inChi2nese)[5],.[J].,2009,(1):56-59.(YUANJian2xin,LIZhi2da.CalculationofConstruc2tionControlofCable2StayedBridgeofZhongxianChangjiangRiverBridgeinChongqin[J].BridgeCon2struction,2009,(1):56-59.inChinese)(54)20m,,7BOT,2004,2006,20078,20099:[1],.[J].,2005,(4):42-44.(SHUMeng2xue,WANGWei2yu.MainBridgeDe2signforHighway2RailwayDual2PurposeBridgeinBingzhou[J].RailwayStandardDesign,2005,(4):42-44.inChinese)(60)(WANGXin2ling,CAOShuang2yin.InnerForceonStrengtheningConcreteStaticallyIndeterminateBeamsPrestressedwithLocalizedTendons[J].JournalofSoutheastUniversity(NaturalScienceEdition),2004,34(1):89-91.inChinese)[9],,.CFRP[J].,2006,31(2):20-24.(PEIJie,DENGZong2cai,DUXiu2li.InvestigationofConcreteBeamsLocallyStrengthenedwithExternalCFRPTendons[J].Hi2TechFiber&Application,2006,31(2):20-24.inChinese)[10]JGJ92-2004/J409-2005,[S].[11]BransonDE,TrostH.ApplicationoftheI2EffectiveMethodinCalculationDeflectionsofPartiallyPres2tressedMembers[J].PCIJournal,1982,27(5):62-77.2720102