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时间:2019-05-15
《南京大胜关长江大桥主桥7号墩钢梁架设技术》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、8桥梁建设2010年第1期文章编号:1003—4722(2010)01—0008—03南京大胜关长江大桥主桥7号墩钢梁架设技术骆双全,刘博(中铁大桥局集团第二工程有限公司,江苏南京210015)摘要:京沪高速铁路南京大胜关长江大桥主桥六跨连续钢桁拱采用从两侧往跨中架设、跨中合龙的总体施工方案。7号墩为六跨连续钢桁拱的中主墩,根据其结构特点制定总体架设方案,采用墩旁托架与钢梁固结、3层水平索辅助架设及2台70t变坡爬行架梁吊机双悬臂架设的新方法,通过调整水平索力将3片主桁空间结构的18个合龙杆件位移同时调整到位。采用该方案顺利完成7号墩钢桁
2、拱梁的双悬臂架设施工,实现2个主跨的无应力、零误差合龙,降低了架设风险,节约了大量的临时结构和设备费用。关键词:高速铁路;钢桁拱桥;双悬臂架设;施工技术中图分类号:U445.46文献标志码:AErectionTechniquesforSteelGirdersatopPierNo.7ofMainBridgeofNanjingDashengguanChangjiangRiverBridgeLUOShuang—quan,LIUBo(The2ndEngineeringCo.,Ltd.,ChinaZhongtieMajorBridgeEnginee
3、ringGroup,Nanjing210015,China)Abstract:Thesix—spancontinuoussteeltrussarchesofthemainbridgeofNanjingDasheng—guanChangjiangRiverBridgeonBeijing—ShanghaiHigh—SpeedRailwaywereconstructed,usingtheoverallconstructionplanoferectingthetrussarchesfromthetwosidestowardsthemidspana
4、ndclosingthearchesatthemidspan.ThepierNo.7istheintermediatemainpiersupportingthesix—spancontinuoussteeltrussarches.Inthelightofthestructuralcharacteristicsofthepier,theoverallconstructionplanforeretctingandclosingthearcheswasformulatedandthenewcon—structionmethodofdoublec
5、antilevererectionoftherigidfixingofthepier—sidebracketswiththesteelgirders,theaidedthree—levelhorizontalcablesandtwosetsofthe70一tcapcacitygradientad—justablecrawlingcraneswasused.Byadjustingthehorizontalcableforces,the18closuremem—bersofthespatialstrucuresofthethreemainst
6、eeltrussesweresimultaneouslyshiftedandadji—ustedinplace.Withtheapplicationoftheconstructionplan,thedoublecanlevererectionofthegirdersatopPierNo.7wassmoothlycompleted,theclosingofthegirdersoftwospanswithoutstressandwithzeroerrorwasrealized,theriskoftheerectionwasreducedand
7、thecostthatwouldspendforalargeamountofthetemporarystrucuresandequipmentwassaved.Keywords:high—speedrailway;steeltrussarchbridge;doublecantilevererection;construc—tiontechnique1工程概况工程,也是沪汉蓉铁路跨越长江的通道,同时搭载南南京大胜关长江大桥是京沪高速铁路的控制性京市双线过江地铁。京沪高速铁路双线设计行车速收稿日期:2009一l1—13作者简介:骆双全(195
8、7一),男,工程师,1989年毕业于江西电大土木工程专业(1sq418394921@qq.corn)。南京大胜关长江大桥主桥7号墩钢梁架设技术骆双全,刘博9度300km/h,沪汉蓉铁路双线设计
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