济南黄河公铁两用桥带加劲弦顶推施工技术.pdf

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1、112桥梁建设2016年第46卷第6期(总第241期)BridgeConstruction。V01．46，No．6．2016(TotallyNo．241)文章编号：1003—4722(2016)06—0112—06济南黄河公铁两用桥带加劲弦顶推施工技术万继，丁仕洪，张时利，梁崇双(中铁四局集团钢结构有限公司，安徽合肥230031)摘要：济南黄河公铁两用桥主桥为主跨180m的五跨刚性悬索加劲连续钢桁梁桥，根据钢桁粱的结构特点及施工条件，该桥钢桁梁采用带加劲弦多点顶推施工方案，在边跨设置拼装支架，在中跨设置墩旁

2、托架，利用跨线龙门吊及多点顶推系统分段拼装、多次顶推架设钢桁梁。施工中，设置了水平顶推、竖向顶升和横向纠偏装置，解决了顶推装置布置的难题；采取滑块、滑板开设油路的摩擦副润滑设计方案，实现了实时注油的强制润滑方式；采用先进的同步性控制系统，解决了多点多桁同步顶推的难题；采用弹性支垫变形协调处理方案，给出了三桁高差的限值(+15mm、一25mm)，解决了三桁高差对施工的影响；采用BIM技术，实现了实时高效的安全管理。济南黄河公铁两用桥主桥已顺利顶推就位，实践证明，带加劲弦顶推施工技术安全可靠。关键词：公路铁路两

3、用桥；钢桁粱；顶推施工；滑移装置；信息集成；施工技术；桥梁施工中图分类号：U448．121；U445．462文献标志码：AConstructionTechniquesforIncrementalLaunchingofJi7nanHuangheRiverRail-。cum‘·RoadBridgewithStiffeningChordsFANGji，DINGShi-hong，ZHANGShi—li，LIANGChong—shuang(SteelStructureCo．，Ltd．，ChinaRailwaySiju

4、CivilEngineeringGroup，Hefei230031。China)Abstract：ThemainbridgeofJi’nanHuangheRiverRail—cum—RoadBridgeisafive—spancon—tinuoussteeltrussgirderbridgewiththerigidsuspensionstiffeningchordsandwiththemainspansof180m．Inthelightofthestructuralcharacteristicsandcon

5、structionconditionsofthesteeltrussgirderofthebridge，thesteeltrussgirderwaserected，usingtheconstructionschemeofmulti—pointincrementallaunchingwiththestiffeningchords．Atthesidespans，theassemblingsupportswerearrangedandatthecentralspans，thepier—sidebracketswe

6、rearranged．Thesteeltrussgirderwasassembledinblocksbythegantrycranescrossingtheexistingrailwaylinesandwaserectedseveraltimes，usingthemulti—pointincrementallaunchingsystem．Intheconstruc—tion，thehorizontallaunching，verticaljacking—upandthetransverseoffsetting

7、rectifyingdeviceswerearrangedandtheproblemOfarrangementoftheincrementallaunchingdeviceswasresolved．Thelubricationdesignschemeofthefrictionsetsthattheoilchannelswereopenedintheslidingblocksandslidingplateswasadoptedandtheforcedlubricatingwaysofrealtimeoilin

8、jectionwereachieved．Theadvancedsynchronouscontrolsystemwasappliedandtheproblemofthemulti—pointandmulti—trusssynchronousincrementallaunchingwastackled．Withthecoordinatehan—dlingofthedeformationoftheelasticsupp