安庆长江铁路大桥主桥无索区钢桁梁架设技术

《安庆长江铁路大桥主桥无索区钢桁梁架设技术》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、桥梁建设2013年第43卷第3期(总第220期)BridgeConstruction，Vo1．43，No．3，2013(TotallyNo．220)37文章编号：1003—4722(2013)03—0037—05安庆长江铁路大桥主桥无索区钢桁梁架设技术童林鸿，王林。(1．中铁大桥局宁安铁路安庆长江大桥工程指挥部，安徽安庆246008；2．中铁大桥局集团第二工程有限公司，江苏南京210015)摘要：安庆长江铁路大桥主桥为双塔三索面钢桁梁斜拉桥，钢桁梁采用N形平行桁式，3片主桁。主桥无索区钢桁梁共12个节间，总重6041．5t，采用散拼法安装，其中6号至

2、7号墩间8个节间钢桁梁在满布膺架上安装，6号至5号墩间4个节间钢桁梁采用悬臂安装。膺架墩对应每个钢桁梁节点布置，膺架共设置7排临时支墩，每排支墩由6根钢管桩组成，通过振动锤插打并接长钢管桩。利用200t浮吊反复站位上、下游的方法起吊拼装钢桁梁，完成无索区钢桁梁架设。该桥钢桁梁架设于2011年10月15日完成，经检测无索区钢桁梁的线形及应力均符合设计要求。关键词：铁路桥；斜拉桥；钢桁梁；膺架法施工；桥梁施工中图分类号iU448．27；U445．4文献标志码：AErectionTechniquesforSteelTrussGirderofMainBrid

3、geofAnqingChaniangRiverRailwayBridgeinAreasWithoutStayCablesTONGLin-hong。WANGLin(1．ConstructionHeadquartersofAnqingChanNiangRiverBridgeonNanjing—AnqingRailway，ChinaRailwayMajorBridgeEngineeringGroupCo．，Ltd．，Anqing246008，China；2．The2ndEngineeringCo．，Ltd．，ChinaRailwayMajorBridgeE

4、ngineeringGroup，Nanjing210015，China)Abstract：ThemainbridgeofAnqingChangjiangRiverRailwayBridgeisasteeltrussgirdercable-stayedbridgewithdoublepylonsandtriplecableplanes．ThesteeltrussgirderofthebridgeisdesignedastheparalleltrusstypeofN—shapeandiscomposedofthreemaintrusses．Thegird

5、erofthemainbridgeintheareaswithoutstaycableshas12panels，totallyweighing6041．5t．Thepanelsofthegirderwereinstalledbythepiece—by—pieceassemblingmethod，ofwhichthe8panelsbetweenthePierNo．6andPierNo．7wereinstalledonstagingandthe4pan～elsbetweenthePierNo．6andPierNo．5wereinstalledbythec

6、antilevermethod．Thepiersofthestagingwerearrangedatthelocationscorrespondingtoeachpanelpointofthegirderandto～tally7arraysofthetemporarypierswerearranged．Ineacharrayofthepiers，therewere6steelpipepilesandthepilesweredriveninandextendedbythevibratinghammer．Thepanelsofthegirderwerel

7、iftedandinstalledandtheerectionofthegirderwascompletedbytherepeatedutili～zationofthe200tcapacityfloatingcranealternativelyplacedatthedownstreamandupstreamsides．TheerectionofthesteeltrussgirderofthebridgewascompletedonOctober15，2011andtheinspectionoftheerectionprovedthatthegeome

8、tricshapesandstressofthegirderintheareaswithoutstaycab