摘要
钢-混凝土板组合梁桥预制装配技术是一种在工厂预制墩柱、盖梁、钢梁和混凝土桥面板,再运至施工现场进行快速装配施工的一种新型组合桥梁施工技术。目前针对钢混组合梁桥的主梁预制装配施工的研究较多,而对桥梁墩柱、盖梁和主梁全预制装配施工综合分析的研究较少,故对桥梁主体结构全预制装配施工关键技术的研究具有重要意义。以全国首例多主梁预制钢混组合梁桥为实例,对桥梁墩柱、盖梁和钢混组合梁的制作、运输和现场拼装等施工关键技术进行了研究。通过总结现场施工经验,确定了钢混组合梁桥主体结构现场拼装的标准化施工工艺;钢混组合梁施工工艺:临时支撑搭设、梁段现场吊装、组合梁精调定位、顶层混凝土桥面板施工、永久支座锚栓孔灌浆施工、组合梁焊接、落梁至永久支座、墩顶横梁混凝土施工;墩柱施工工艺:承台表面清理、坐浆挡板安装、墩柱翻身吊装、墩柱安装对位、墩柱精调、承台顶面坐浆、墩柱微调及套筒灌浆;盖梁施工工艺:盖梁支架安装、坐浆挡板安装、盖梁安装、墩柱顶坐浆、盖梁微调及套筒灌浆、湿接缝施工、预应力施工。研究表明:桥梁主梁采用11片工字钢梁与预制混凝土板组成的组合梁,改善了桥梁结构自重、解决了运输问题,是对钢混组合梁结构的优化设计;墩柱、盖梁、钢混梁吊装施工中研制的标准化临时支撑结构、吊装方案和施工工序,提高了施工现场管理水平,促进了管理的精细化;预制墩柱与现浇承台、预制盖梁之间通过灌浆套筒进行连接,其标准化的施工工艺解决了预制装配施工的关键技术问题;桥梁主体结构采用预制装配技术,改变了传统的施工工艺,产生了良好的社会效益,是桥梁发展的必然趋势。
The precast assembly technology of steel-concrete composite girder bridge is a new type of construction technology,in which piers,caps,steel girders and concrete decks are prefabricated in factories and then transported to the construction site for assembling rapidly.At present,there are many researches on the precast assembly of the main girder of steel-concrete composite girder bridge,but few comprehensive analysis researches on the precast assembly of piers,caps and main girders.Therefore,it is of great significance to research the key construction techniques of the full precast assembly of the main structure of the bridge.Taking the first multi-girder steel-concrete composite girder bridge in China as an example,this paper researches the key construction techniques of piers,caps and steel-concrete composite girders,such as fabrication,transportation and assembly.Through summarizing the construction experience,the standardized construction technology of the main structure for the steel-concrete composite bridge is determined.Construction technology of steel-concrete composite girders:temporary supports erection,girders hoisting on-site,precise adjustment and positioning for composite girders,construction for the top concrete of bridge deck,grouting construction for anchor bolt holes of permanent bearing,welding for composite girders,girders falling to permanent bearing and concrete construction for beams on pier.Construction technology of piers:surface cleaning for cushion caps,installation for baffle plate of grouting,turning over and hoisting for piers,alignment for piers,precise adjustment for piers,grouting on top of cushion caps,fine adjustment for piers and sleeve grouting.Construction technology of caps:temporary supports installation,installation for baffle plate of grouting,caps installation,grouting on top of piers,cap beam fine adjustment for caps and sleeve grouting,construction for wet-joint,prestressing construction.The conclusions are as follows,the main girder of the bridge is composed of 11 I-
作者
杨耀
周姝
Yao Yang;Shu Zhou(Changsha Urban Development Group Co.,Ltd.,Changsha 410011,China;International College,Changsha University of Science and Technology,Changsha 410114,China)
出处
《钢结构（中英文）》
2021年第4期20-25,共6页
Steel Construction（Chinese & English）
关键词
钢混组合梁
预制
装配
施工技术
steel-concrete composite girder
precast
assembly
construction techniques
