天津海河开启桥钢箱梁架设与合龙控制技术

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1、天津海河开启桥钢箱梁架设与合龙控制技术黄羚，张勇，仇高山67文章编号：1003—4722(2011)O1—0067—04天津海河开启桥钢箱梁架设与合龙控制技术黄羚，张勇，仇高山。(1．石家庄铁道大学土木分院，河北石家庄050043；2．中铁十四局集团第三工程公司，山东兖州272100)摘要：天津海河开启桥为一座跨径为76m的双页立转式开启桥，针对开启桥安装精度要求高，施工期间受海河通航条件限制，提出该桥钢箱梁架设采用半支架悬拼装方案。该桥钢箱梁单侧纵向分0～5号块，薄壁空腔内与轴承座附近的钢箱粱采用有支架施工，搭设钢管型钢支架，利用架桥机配合千斤顶依次安装0～3号块；跨中部分的钢箱梁采用架桥

2、机悬臂拼装，利用300t驳船将4号、5号块依次浮运至航道中央，利用架桥机提吊安装，精确定位后焊接成整体。通过线形监控及独特的钢梁尾销及跨中对中销装置的安装控制方法，实现了桥梁线形与跨中锁定合龙的双重控制。关键词：开启桥；钢箱梁；安装架设；合龙；控制技术；桥梁施工中图分类号：U448．26文献标志码：AControlTechniquesforErectionandClosureofSteelBoxGirderofTianjinHaiheRiverBasculeBridgeHUANGLing，ZHANGYong2，QIUGao-shan。(1．SchoolofCivilEngineering，S

3、hijiazhuangRailwayInstitute，Shijiazhuang050043，China；2．The8rdEngineeringCo．，Ltd．，ChinaRailwayTieshisijuCivilEngineeringGroup，Yanzhou272100，China)Abstract：TianjinHaiheRiverBasculeBridgeisadouble—leafverticallypivotedbridgewithspanlength76m．Inviewofthestrictprecisionrequirementsforerectionofthebridge

4、andtherestrictionofnavigationontheHaiheRiverduringconstruction，theschemeofcantileverassemb—lingaidedbypartofthescaffoldingwasproposedforerectionofthesteelboxgirderofthebridge．Longitudinaily，thesteelboxgirderononesidewasmadeupofblocksNo．0～5．Thepartofthesteelboxgirderoverthethin——walledchamberandnear

5、bytheaxlebearingseatwasas—-sembledanderectedonthescaffolding．ThesteelpipeandsectionalsteelscaffoldingwassetupandtheblocksNo．0～3wereerectedsuccessivelybytheoverheadlaunchinggantrybytheaidofjacks．ThepartofthemidspansteelboxgirderwaserectedcantiIeveredIy．TheblocksNo．4andNo．5weredeliveredtothecenteroft

6、heshippingchannelbythe300一tcapacitybarge，wheretheblockswereliftedandassembledbythegantryandaftertheblockswerepreciselypositioned，theywerethenweldedwiththepreviousblocks．Bymeansofthegeometricshapemonitoringandtheuniqueassemblingandcontrolthatutilizedthesteelgirderendpinsandmidspanpinningde—vice，thed

7、ualcontrolofthegeometricshapeandmidspanlock—inclosureofthebridgewasfinallyachieved．Keywords：basculebridge；steelboxgirder；assemblinganderection；closure；controltech-nique；bridgeconstruction收稿日期：2010—0429作者简介：