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时间:2017-12-08
《港珠澳大桥集束式剪力钉钢-混组合连续梁施工技术》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
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