双幅并制箱梁移动模架施工关键技术研究  

Research on the Key Technology of Construction of Moving Formwork for Double-width Parallel Box Girder

作　　者：王杰 钱有伟 WANG Jie;QIAN Youwei(The Second Engineering Co.Ltd of China Tiesiju Civil Engineering Group,Suzhou,Jiangsu 215131,China)

机构地区：[1]中铁四局集团第二工程有限公司,苏州215131

出　　处：《铁道工程学报》2022年第1期56-60,共5页Journal of Railway Engineering Society

摘　　要：研究目的:移动模架现浇箱梁施工技术已在国内外很多工程中应用,目前主要是单幅式移动模架,当遇到双幅小间距现浇箱梁时,普通常规单幅式移动模架施工受梁缝宽度限制,在第二幅箱梁施工时,无法开模纵移,使用范围受限。因此,本文通过对温州市域铁路S1线灵昆特大桥50 m双幅现浇箱梁开展双幅并制移动模架施工技术研究,旨在形成一套详细的双幅并制箱梁移动模架关键施工技术。研究结论:(1)双幅并制箱梁移动模架关键构件有限元计算结果与预压试验的实测数据变化趋势总体吻合较好;(2)双幅并制箱梁移动模架混凝土浇筑顺序合理,浇筑设备的布置、混凝土输送方式及模架开模纵移方式满足施工需要;(3)创新设计双幅并制箱梁移动模架结构,采用内侧外模、底模多次折叠的方式,实现了近间距箱梁双梁并制,模架尾部配置横移调节油缸,解决了小半径曲线过孔难题;(4)本研究成果可为其他类似工程移动模架设计及施工提供参考。Research purposes:The moving formwork cast-in-situ box girder construction technique has been applied to many projects at home and abroad.At present,it is mainly the single-width moving formwork.In the case of cast-in-situ box girder with double width and small spacing,ordinary conventional single-width moving formwork construction is limited by the beam width,in the construction of the second picture box girder,the formwork cannot be moved longitudinally,and the use scope is limited.Therefore,through the research on the construction technology of the 50 m double-width cast-in-place box girder of Lingkun super bridge of Wenzhou Railway Line S1,this paper aims to form a set of key construction technology of the double-width parallel cast-in-place box girder.Research conclusions:(1)The finite element calculation results of the key components of the double-width parallel box girder moving formwork are in good agreement with the measured data of the preloading test;(2)The concrete pouring sequence of the moving formwork of double-width parallel box girder is reasonable,and the layout of the pouring equipment,the concrete conveying mode and the longitudinal movement mode of the formwork meet the construction needs;(3)Innovative design of double-width parallel making box girder moving formwork structure,use of folding the inner and outer formwork and bottom formwork for many times,realize the parallel manufacturing of the near distance box girder double beam,and the formwork tail is equipped with transverse adjustment cylinder,which solves the problem of small radius curve passing through holes;(4)The research results can provide reference for the design and construction of other similar projects.

关 键 词：移动模架 双幅并制箱梁 有限元分析 预压试验 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]