京沪高速铁路禹济特大桥29．15 m非标箱梁架设施工技术.pdf

·桥　 梁· 京沪高速铁路禹济特大桥29．15m 非标箱梁架设施工技术 申永利 (中国中铁航空港建设集团有限公司, 北京　 100093) 摘　 要:对于京沪高速铁路禹济特大桥非标箱梁,研究采用JQ900b 型高速铁路标准箱梁架桥机进行架设的方法。 针对桥梁地处黄河淤积层、12．5m高墩的特点,采用增加临时桩基、扩展承台尺寸,设计2 组4 肢格构式钢管墩柱 作为支撑,对临时支墩采用精轧螺纹钢张拉模拟压载,解决了29．15m非标支架现浇箱梁变更设计为预制架设的施 工难题。 关键词:高速铁路; 预应力混凝土; 箱形梁; 架桥机 中图分类号:U445．468　 　 文献标识码:B　 　 文章编号:1004 2954(2013)12 0070 04 ConstructionTechnologyforErectingNon-standard29．15-mBoxGirder ofYujiSuperMajorBrideonBeijing-ShanghaiHigh-speedRailway SHENYong-li (ChinaRailwayAirportConstructionGroupCo.,Ltd.,Beijing100093,China) Abstract:Thepaperstudiedhowtoerectthenon-standard29．15mboxgirderoftheYujisupermajor bridgeonBeijing-Shanghaihigh-speedrailway. TheJQ900b-typegirder-erectingmachine,whichhad beenoriginallyforstandardboxgirderofhigh-speedrailway,wasputintouse,partlywithapurposeof researchinghowtousethisgirder-erectingmachineinnon-standardboxgirder. Meanwhile,inviewof thisbridge’scharacteristicsofbeingsitedattheYellowRiveralluviumwith12．5mhighpiers,aseriesof effectiveconstruction technologieswere used for the temporary supporting:adding the temporary pile foundation,enlargingthesizeofbearingplatform,designingtwosetsof4-limbsteeltubelatticecolumns. Atthesametime,thesimulationtestonthestretchingandloadingoftheprecisionrollingscrewthread steelwasconductedfortestingthetemporarysupporting. Therewasadifficultprobleminconstruction: accordingtothedesignalterationdocument,theerectingmethodforthenon-standard29．15-mboxgirder mustbealteredfromthecast-in-situplussupport-framemethodintotheprefabricationmethod. However asaresult,thisdifficultprobleminconstructionhasbeenabletobesolvedbyusingabove-mentioned constructiontechnologies. Keywords:high-speedr