港珠澳大桥九洲航道桥主梁及桥塔施工关键技术.pdf

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1、桥梁建设2016年第46卷第6期(总第241期)BridgeConstruction，V01．46，No．6。2016(TotallyNo．241)文章编号：1003～4722(2016)06—0001—06港珠澳大桥九洲航道桥主梁及桥塔施工关键技术潘军1’2，徐瑜(1．中铁大桥局集团有限公司，湖北武汉430050；2．桥梁结构健康与安全国家重点实验室，湖北武汉430034；3．中铁大桥局集团第二工程有限公司，江苏南京210015)摘要：港珠澳大桥九洲航道桥为主跨268m的钢一混组合粱斜拉桥，主梁采用开口钢箱梁+混凝土桥面板的组合截面；桥塔为帆形，由竖直的塔柱和弯曲的曲臂组成，高114．

2、7m，采用钢一混组合结构。受海上恶劣环境和航空净空影响。桥梁施工难度大，为确保施工质量，提高施工效率，帆形钢塔柱在工厂内分段制造，上塔柱在工厂组拼成整体后运至墩位，利用大型浮吊将其整体提升至桥面，再利用桥面钢管支架进行提升、滑移、竖转安装施工；钢一混组合梁采用分幅、大节段工厂化制造，利用纵、横移滑道滑移出海。利用运架一体船起吊运输，支架法架设，左、右幅对接成整体后，逐步完成顺桥向大节段间的组拼焊接、斜拉索挂设、合龙及体系转换施工。关键词：斜拉桥；钢箱梁；组合梁；钢塔柱；提升滑移竖转；钢一混大节段；支架法架设；桥粱施工中图分类号：U448．27；U443．3文献标志码：AKeyTechni

3、quesforConstructionofMainGirderandPylonsofJiuzhouShipChannelBridgeofHongKong-Zhuhai—MacaoBridgePANdunl～．XUYu3(1．ChinaRailwayMajorBridgeEngineeringGroupCo．，Ltd．．Wuhan430050，China；2．StateKeyLaboratoryforHealthandSafetyofBridgeStructures，Wuhan430034，China；3．The2ndEngineeringCo．，lad．，ChinaRailwayMajo

4、rBridgeEngineeringGroup。Nanjing210015。China)Abstract：TheJiuzhouShipChannelBridgeoftheHongKong—Zhuhai—MacaoBridgeisasteelandconcretecompositegirdercable—stayedbridgewithamainspanof268m．Thecrosssectionofthemaingirderofthebridgeisthecompositesectionoftheopensteelboxgirdertoppedwithcon—cretedeckslabs

5、．Thepylonsarethesailshapeandarecomprisedoftheverticalpyloncolumnsandcurvedarms．Theheightofthepylonsis114．7mandthepylonsarealsothesteelandconcretecompositestructures．Affectedbytheharshseaenvironmentandtheaviationheightrestrictionatthebridgesite，theconstructionofthebridgewasquitedifficult．Toensuret

6、heconstructionquali—tyandimprovetheconstructionefficiency，thesailshapesteelpylonsweremanufacturedinseg—mentsintheworkshop．ThesegmentsoftheuppercolumnofeachpylonwereassembledintoanintegraluppercolumnintheworkshopandthecolumnwastransportedtOthepylonpiersitewherethecolumnwasthenintegrallyliftedtOthe

7、bridgedeckbythelargefloatingcrane．Aidedbythesteelpipesupportonthedeck，thecolumnwasinstalledbywayoflifting，slidingandverticallyro—tating．Thesteelandconcretecompositemaingirderwasmanufacturedinseparatedpartsandinlargeseg