超大跨度机库钢结构屋盖施工关键技术  

Key construction technologies for steel structure roof of super-long span hangar

作　　者：周观根 陈伟刚 游桂模 张贵弟 ZHOU Guan-gen;CHEN Wei-gang;YOU Gui-mo;ZHANG Gui-di(Zhejiang Southeast Frame Co.,Ltd.,Hangzhou 311029,China)

机构地区：[1]浙江东南网架股份有限公司,浙江杭州311209

出　　处：《空间结构》2024年第3期52-58,69,共8页Spatial Structures

摘　　要：厦门太古翔安机场维修基地项目1号机库屋盖结构是目前世界上单体规模最大、跨度最大的民航飞机维修机库.结合现场条件与工程重难点,采用了无支撑原柱位分阶段累积同步提升的施工方法进行工程安装.重点介绍了大面积、超大跨度钢结构屋盖施工全过程的形态控制技术.大型网架结构模块化拼装技术有效解决了传统地面散件拼装高空作业量大、精度控制难的技术难题.超大跨度钢结构屋盖无支撑原柱位分阶段累积同步提升技术,实现了超大吨位提升器群组大级差同步控制和虚实耦联协同控制,解决了超大跨度结构、自重大且集中于大门桁架中柱、受力不均匀、不同提升点受力级差大和同步控制难的技术难题.提出了一种“双Y”型转换工装,并借助有限元软件对其关键节点的受力性能进行了数值分析,验证了大门桁架提升点传力的连续性和受力的可靠性.上述方法的成功应用,为同类超大跨度钢结构屋盖的施工提供参考.The roof structure of the hangar 1 in the Taigu Xiang'an Airport Maintenance Base Project in Xiamen is the largest single-unit civil aviation aircraft maintenance hangar in the world with the largest span.Considering the site conditions and key difficulties of the project,the unsupported original column position phased cumulative synchronous lifting construction method was adopted.This article focuses on the morphological control technology for the entire construction process of large-area and super-large-span steel structure roof.The modular assembly technology of large grid structures effectively solves the technical challenges of traditional ground-based assembly of scattered parts,including large quantities of high-altitude work and difficult accuracy control.The unsupported original column position phased cumulative synchronous lifting technology for super-large span steel structure roof realizes the synchronous control of large-scale differential groups of super-large tonnage lifting devices and the coordinated control of virtual-real coupling.This resolves the technical challenges of super-large span structures,heavy self-weight concentrated on the middle column of the portal truss,uneven force distribution,large force-level differences among different lifting points,and difficulty in synchronized control.A "double Y"type transition tooling is proposed to achieve the continuity of force transmission and reliability of force bearing at the lifting points of the portal truss.The mechanical performance of its key nodes is numerically analyzed by using finite element software.The successful application of the above methods provides reference for the construction of similar large-span structure roofs.

关 键 词：超人跨度机库 钢结构屋盖 无支撑原柱位 形态控制 模块化拼装 分阶段累积同步提升 

分 类 号：TU745.2[建筑科学—建筑技术科学]