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1、j4文章編號(hào)：1003—4722(2O11)05—006405鄂東長江公路大橋設(shè)計(jì)關(guān)鍵技術(shù)胡明義，黃冰釋，余俊林，唐守峰(湖北鄂東長江公路大橋有限公司。湖北黃石135()02)摘要：鄂東長江公路大橋主橋?yàn)橹骺?26／n的雙塔雙索面半飄浮體系混合梁斜拉橋．主梁采用分離式雙箱PK斷面形式，中跨為鋼箱梁，邊跨為PC箱梁，鋼一混凝土結(jié)合段設(shè)于中跨距橋塔中心l2．5Hi處。為使鋼結(jié)構(gòu)與混凝土結(jié)構(gòu)平穩(wěn)過渡，鋼一混凝土結(jié)合段采用PBI剪力連接器的多格室傳力構(gòu)造。索塔錨固采用在塔柱內(nèi)置鋼錨箱的構(gòu)造，為控制錨固區(qū)混凝土
2、裂縫開展，在錨固側(cè)混凝土塔壁內(nèi)設(shè)置l2j515．24預(yù)應(yīng)力束。為增強(qiáng)結(jié)構(gòu)耐久性和使用壽命，進(jìn)行鋼筋混凝土耐久性及鋼結(jié)構(gòu)防腐設(shè)計(jì)；采用全壽命設(shè)計(jì)理念，設(shè)置橋梁各主要構(gòu)件檢查維護(hù)通道，提出構(gòu)件檢查、維護(hù)周期及更換標(biāo)準(zhǔn)、工藝及技術(shù)要求。關(guān)鍵詞：鄂東長江公路大橋；斜拉橋；混合梁；結(jié)合段；橋梁設(shè)計(jì)中圖分類號(hào)：U448．27；U442．5文獻(xiàn)標(biāo)志碼：AKeyTechniquesforDesignofEdongChangjiangRiverHighwayBridgeHUMing—yi，HUANGBing—shi。l
3、【，Jun—lin。TANGShou—feng(HubeiEdongChangjiangRiverHighwayBridgeCo．，Ltd．，Huangshi435002，China)Abstract：ThemainbridgeofEdongChangjiangRiverHighwayBridgeisasemi—floatingsysternhybridgirdercable—stayedbridgewithdoublepylons，doublecableplanesandwitharnaiI1spa
4、n926m．FhemaingirderofthebridgewasdesignedasthePK(PascoKennewickt~ridge)crosssectionofseparatedtwinboxes，ofwhichthepartofthegirderforthecentralspanisofthcsteelboxgirder。thepartsofthegirderforthesidespansareoftheprestressedconcrete(P(、)boxgirdersandasteel
5、andconcretejointsectionwassetoneachsideofthecentralspanatadistanceof12．5mlOthecenterofapylon．Toensureasmoothtransitionbetweenlhesteel~ln(tconcretestructure，themulti—cel1forcetransmissionstructurewithPBIshearconneclorwastlsedforthejointsection．Thecable—t
6、o—pylonanchorageisthesteelanchorboxstructurebuihinthecolumnofapylon．Tocontrolthedevelopmentofconcretecracksintheanchoragezoneinthepylon，theprestressingstrandsof1215．24weresetintheconcretepylonwallonthesideoftheanchorage．T0enhancethestructuraldurabilitya
7、ndservicelife，thedurabilityofreinforcedCOI)creteandcorrosionprotectionofsteelstructureweredesignedandthelifecyclecostconceptwasapplidetOthedesign．Theinspectionandmaintenanceaccessesforallprincipalcomponentsof{hebridgewereprovidedandtheinspectionandmaint
8、enancecycles，replacementcriteria，workmarlshipandtechnicaIrequirementSwereformulatedaswel1．Keywords：EdongChangjiangRiverHighwayBridge；cable—stayedbridge；hybridgirder：jois51section；bridgedesign收稿日期：2Ol0¨lfJ作者簡(jiǎn)介：胡明義(1939?)．男，教授級(jí)高工，1
