41材料与技术Material&Technology2023NO.05收稿日期：2022-06-17作者简介：施军(1981—)，男，四川合江人，硕士，工程师，主要从事桥梁设计及施工方面的工作。通讯作者：唐亮(1983—)，男，重庆人，副教授，主要从事桥梁检测监测研究，邮箱：tangliang@cqjtu.edu.cn。EffectsofTemporaryBuckleTowerinIncrementalLaunchingConstructionofLong-spanSteelBoxGirderShiJun,LanXiaojun,GaoYamin,ZhouHongdeng,ZhengXiaoyang,TangLiangAbstract:Duringtheincrementallaunchingconstructionoflong-spansteelboxgirder,theoverlargedownflexureofguidebeammakesitdifficulttogetonthepierandaffectsconstructionsafety.Settingatemporarybuckletowerisaneffectivemethodtoreducedeflectionoftheguidebeam.BasedonalargebridgeinHotanPrefecture,Xinjiang,thispaperdiscusseshowtocrossthe100-metremainspanofthebridgebysettinguptemporarybuckletowerstoassistinincrementallaunchingconstructionwithouttemporarypiers.Byestablishingafiniteelementmodelfortheentireconstructionprocess,thedisplacementandstresssituationofthebeamandtemporaryauxiliaryfacilitiesduringtheincrementallaunchingprocesswereanalyzed,andthedisplacementchangecurveandstressenvelopediagramofthetopandbottomsurfacesofthebeamwereplottedsectionbysection.Theresultsshowthatsettingthetemporarybuckletowercanliftthebottomofthefrontendoftheguidebeamtothepiertop.Inthewholeprocess,themaximumMisesstressonthetopandthebeamdecreasesby62.7%and29.5%,respectively.Thestudyprovidesatechnicalreferenceforthesimilarbridgeconstructionsinthefuture.Keywords:steelboxgirder;incrementallaunchingconstruction；longspan；displacementcontrol；buckletower0引言随着我国交通基础设施的不断完善，越来越多的道路渗透向山川、峡谷、跨越铁路线等地形条件复杂的地区，越来越多中大跨度桥梁需要建设。顶推法施工凭借其不占用桥下空间、不影响桥下通行、所需器械简单等特点在城市高架桥、跨铁路桥、跨山川河泊等桥梁建设中备受青睐。克服导梁前端挠度顺利上墩作为顶推施工过程中的重要条件，已有学者进行了理论探索和工程实践。郑北大桥在94m顶推跨径施工中采用临时扣锁塔架辅助跨越技术，在箱梁前端设置格构柱式扣锁塔架，有效降低了结构应力和结构挠度，而且扣塔...
