2023·10·BuildingConstruction2080跨河桥连续钢箱梁顶推安装施工技术左海峰陆顺康上海建工五建集团有限公司上海200062摘要：叶新公路—大叶公路（新工路—老黄桥港）道路改建工程位于郊野水系丰富地区，改建经过跨越河道且不停航施工作业，给跨河桥钢箱梁安装施工带来一定的挑战。以左幅钢箱梁安装为例，通过前期方案策划与比选，决定采用分段顶推施工技术。介绍了钢箱梁顶推具体流程以及施工过程中采取的一些技术措施。实践证明，顶推效果良好，顶推过程中各项指标均在可控范围内。关键词：不停航；钢箱梁安装；分段顶推；施工技术中图分类号：TU997文献标志码：A文章编号：1004-1001(2023)10-2080-04DOI：10.14144/j.cnki.jzsg.2023.10.040ConstructionTechnologyofContinuousSteelBoxGirdersPushingInstallationforRiverCrossingBridgesZUOHaifengLUShunkangShanghaiConstructionNo.5(Group)Co.,Ltd.,Shanghai200062,ChinaAbstract:TheroadreconstructionprojectoftheYexinHighway–DayeHighway(XingongRoad–LaohuangqiaoPort)islocatedinanareawithabundantwatersystemsinthecountryside.Thereconstructioninvolvescrossingriverchannelsandnon-stopconstructionoperations,whichposescertainchallengestotheinstallationandconstructionofsteelboxbeamsforrivercrossingbridges.Takingtheinstallationoftheleftsteelboxgirderasanexample,throughearlystageprogramplanningandcomparison,itisdecidedtoadoptsegmentalpushingconstructiontechnology.Thespecificprocessofsteelboxgirderlaunchingandsometechnicalmeasurestakenduringtheconstructionprocessareintroduced.Thepracticeprovesthatthepushingeffectisgood,andallindicatorsduringthepushingprocessarewithinacontrollablerange.Therelevantconstructionexperiencecanprovidereferenceforsimilarprojects.Keywords:non-stopnavigation;installationofsteelboxgirder;segmentalpushing;constructiontechnique工程起点茹塘大桥茹塘村河桥西二号河桥西三号河桥工程终点图1二标平面位置示意本标段道路全长2.0km，道路规划红线宽度45m，道路等级为一级公路，设计速度80km/h。标段范围内含跨茹塘港Ⅳ级航道桥1座，桥长422m。其中，茹塘大桥引桥采用先简支后连续的30m跨预应力预制混凝土钢箱梁，主桥采用变截面连续钢箱梁桥，跨径布置为（42＋68＋42）m，双幅设置，主桥轴线与茹塘河斜...
