港珠澳大桥集束式剪力钉钢-混组合连续梁施工技术

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1、桥梁建设2014年第44卷第6期(总第229期)BridgeConstruction，Vo1．44，No．6，2014(TotallyNo．229)文章编号：1003—4722(2O14)06—0001—06港珠澳大桥集束式剪力钉钢一混组合连续梁施工技术陶建山(中铁大桥局集团有限公司，湖北武汉430050)摘要：港珠澳大桥浅水区非通航孔桥采用85m钢～混组合连续梁桥形式，组合梁采用单箱单室等高连续梁，由开口钢箱梁和混凝土桥面板通过剪力钉连接而成，剪力钉采用集束式布置，桥面板在剪力钉处设置预留槽。钢箱梁采用“无马”焊接成整孔大节段，整孔

2、打砂和涂装；混凝土桥面板采用整体式台座模板预制，施工缝采用洗毛工艺施工；按钢箱梁预拼时的预拱度线形进行钢箱梁与混凝土桥面预制板组合，采用高弹性防腐橡胶条和环氧砂浆材料进行密封和粘接；组合梁采用大型运架一体船进行整孔运输、逐孔安装架设；钢箱梁接口在墩顶进行配切和对接焊接，完成简支变连续体系转换关键词：连续梁桥；组合梁；钢箱梁；混凝土桥面预制板；集柬式剪力钉；桥梁施工中图分类号：U448．21；U445．47文献标志码：AConstructionTechniquesf0rSteel-ConcreteContinuousCompositeG

3、irderofHongKong-Zhuhai-MacaoBridgeUsingClusteredShearStudsTA0Jian-shan(ChinaRailwayMajorBridgeEngineeringGroupCo．，Ltd．，Wuhan430050，China)Abstract：Thenon—navigablespanbridgeoftheHongKong—Zhuhai—MacaoBridgeovertheshallowwaterareaisa85一mspansteel—concretecontinuouscomposit

4、egirderbridge．Thecompos—itegirdersofthebridgearethesingle——cellsingle—boxgirdersofconstantdepthandarecomposedoftheopensteelboxgirdersandconcretedeckslabsthatareconnectedbytheshearstuds．Theshearstudsarearrangedinclusterandinthedeckslabswheretheshearstudsaretobearranged．t

5、heshearpocketsarepre—reserved．Thesteelboxgirdersareweldedintoeachfullspanlargegirderblockwithoutusingthetemporaryfixingplatesandaresandblastedandpaintedalsoineachfullspan．Theconcretedeckslabsareprecastintheintegralprecastingbedformworkandtheconstructionjointsofthedecksl

6、absareconstructedbytherougheningworkmanship．Thesteelboxgirdersandtheprecastconcretedeckslabsarecompositedinaccordancewiththepre-camberingalignmentforassemblingoftheboxgirders．Thejointsamongthedeckslabsaresealedandbonded，usingthehighelasticandcorrosion—resistantrubberstr

7、ipsandepoxymortar．Thecompositegirdersaretransportedineachfullspanbythelargetransportationanderectionvesselandareerectedspanbyspanatthebridgesite．ThesteeIboxgirdersarematchcutatthepiertopsandareweldedtogetherandafterwards，thesystemtransformationofthesimply～sup—portedcomp

8、ositegirderstothecontinuouscompositegirderisfinallycompleted．Keywords：continuousgirderbridge；compositegirder；s