摘要
以港珠澳大桥珠海口岸钢屋盖工程为例,对双向大跨度钢屋盖网架结构整体提升的关键施工技术进行研究。基于双向大跨度钢屋盖网架结构吊装工作量大、安装位点精度要求高、吊装重量大、临时设施搭设难度高等特点,采用地面分区拼装、超大型构件液压同步提升、网架提升点构造设计、提升同步性控制等整体提升关键技术,并运用有限元分析软件对提升过程中结构的应力与变形进行模拟验算,确保该网架结构的施工质量及安全。实践结果表明,所提出的施工技术安全可靠且经济可行。
In order to study the key construction techniques of integral lifting of the bidirectional long-span steel roof grid structure,the steel roof project of Zhuhai Port of Hong Kong-Zhuhai-Macao Bridge was taken as an example.Based on the characteristics of steel roof grid structure with bidirectional long-span such as large workload of lifting,high request of installation position,large weight of lifting,high construction difficulty of temporary support and so on,it was proposed to adopt the integral lifting techniques,which including divisional installation on the ground,hydraulic synchronizing lifting technique of ultra large member,detailed design of lifting platform,and controlling of synchronizing lifting.In addition,the finite element software was used to conduct the simulation of stress and deformation of the structure during lifting in order to ensure the construction quality and safety of grid structure.It was evident that the proposed technique was safe,reliable and economic.
作者
莫涛涛
MO Taotao(Guangdong SCUT Engineering Construction Supervision Co.,Ltd.,Guangzhou 510641,China)
出处
《钢结构》
2019年第6期78-82,116,共6页
Steel Construction
关键词
钢屋盖
网架结构
整体提升
施工技术
steel roof
grid structure
integral lifting
construction technique