港珠澳大桥减光罩结构设计选型和施工控制要点

Structural design selection and construction control points of light reduction cover for Hongkong-Zhuhai-Macao Bridge

港珠澳大桥减光罩是海底隧道在人工岛上的一个重要交通转换节点。为了项目设计合理和便于施工,文章通过对减光罩结构选型过程和施工要点进行研究和论述,得出了采用钢结构镂空设计能取得较好的减光效果和便于施工,并给出了便于远海海岛环境钢结构焊接、涂装和安装的具体措施。通过施工和运营情况来看,这些措施较为合理,可以为远海海底隧道出入口减光结构设计和施工提供参考。

The light reduction cover of Hongkong-Zhuhai-Macao Bridge works is an important transfer connection between the artificial island and submarine tunnel. In order to make a reasonable design and provide convenience for construction, we studied and discussed the structural selection process and construction control points of the light reduction cover. It is concluded that the steel structure hollow-out design can achieve better light-reducing effect and is convenient for construction, and put forward specific measures for welding, coating and installation of the steel structure in offshore island environment. According to the construction and operation situation, these measures are reasonable, which can provide reference for the design and construction of the light-reducing structure of the entrance and exit of the offshore submarine tunnel.