平潭海峡公铁两用大桥总体施工方案.pdf

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1、桥梁建设２０１７年第４７卷第２期（总第２４３期）BridgeConstruction，Vol．４７，No．２，２０１７（TotallyNo．２４３）１文章编号：１００３－４７２２（２０１７）０２－０００１－０６平潭海峡公铁两用大桥总体施工方案马晓东（中铁大桥局集团有限公司，湖北武汉４３００５０）摘要：平潭海峡公铁两用大桥的FPZQ‐３标段全长约１１．１５km，包括３座通航孔桥（双塔钢桁混合梁斜拉桥）、１１９孔非通航孔桥（混凝土梁桥）、３４孔引桥（简支钢桁结合梁桥）。针对桥位处施工条件恶劣、工程量巨大、作业时间短等特点，基础施工采用长栈桥、先平台后围堰的方

2、案，其中栈桥全长约７．５km，通航孔桥采用打入桩、导管架及“打入桩＋锚桩”３种钻孔平台方案，采用５０００型旋转钻机施工大直径钻孔桩基础（直径为４．０m和４．５m），桥塔墩承台采用防撞吊箱围堰施工；通航孔桥桥塔均采用爬模施工，且爬模作业平台采用包围结构；通航孔桥采用浮吊及架梁吊机双悬臂法进行大节段钢桁梁施工；非通航孔桥的简支钢桁梁采用工厂整孔制造、浮吊整孔架设的施工方案；混凝土箱梁采用移动模架法施工。关键词：跨海桥；公路铁路两用桥；斜拉桥；结合梁；钢桁梁；超大直径钻孔桩；吊箱围堰；大节段架设法；施工方案中图分类号：U４４８．１２１；U４４５．４文献标志码：

3、AGeneralConstructionSchemeofPingtanStraitsRail‐cum‐RoadBridgeMAXiaodong‐（ChinaRailwayMajorBridgeEngineeringGroupCo．，Ltd．，Wuhan４３００５０，China）Abstract：TheContractFPZQ‐３ofthePingtanStraitsRail‐cum‐RoadBridgeistotallyabout１１．１５kmlongandcontains３navigablespanbridges（double‐pylonsteeltr

4、usshybridgirdercable‐stayedbridges），１１９spansofthenon‐navigablespanbridges（concretegirderbridges）anda３４‐spanapproachbridge（simply‐supportedsteeltrusscompositegirderbridge）．Inthelightofthecharacteristicsthattheconstructionconditionsatthebridgesitearetough，theengineeringquanti‐tiesa

5、reenormousandtheconstructiontimeislimited，thefoundationsoftheContractaretobeconstructed，mainlyusingtheschemeofthelongtrestleandofbuildingtheboringplatformsfirstandthecofferdamslate，ofwhichthetrestleistotallyabout７．５kmlong．Fortheconstructionofthefoundationsofthenavigablespanbridge

6、s，３typesoftheboringplatformstoberespectivelysupportedonthedrivenpiles，jacketsupportsandonthe“drivenpiles＋anchorpiles”arearrangedandthelargediameterboredpiles（diameters４．０mand４．５m）ofthefoundationsareconstruc‐ted，usingtheType５０００rotaryboringmachines．Thepilecapsofthepylonpiersarecon

7、structed，usingtheanti‐collisionsteelboxedcofferdams，thepyloncolumnsareconstructed，allusingtheclimbformworkandtheworkingplatformsoftheclimbformworkarethesurroundingstructures．Thesteeltrussgirdersofthenavigablespanbridgesaretobeerectedintwo‐sidecantileversandinlargesegments，usingth

8、efloatingcranesanddeckcranes．Thesimply‐s