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港珠澳大桥是我国继三峡工程、青藏铁路、南水北调、西气东输、京沪高铁之后又一重大基础设施项目,东连香港、西接珠海、澳门,是集桥、岛、隧为一体的超大型跨海通道。中国交通建设股份有限公司联合体承建的岛隧工程是大桥工程的施工控制性工程,由沉管隧道、东西人工岛三大部分组成,其中沉管隧道是目前世界上综合难度最大的沉管隧道之一,起于伶仃洋粤港分界线,穿越珠江口铜鼓航道、伶仃西航道等主要航道,全长7440.546米。
The Hong Kong-Zhuhai-Macao Bridge is another major infrastructure project in China following the Three Gorges Project, the Qinghai-Tibet Railway, the South-to-North Water Transfer Project, the West-East Gas Pipeline Project, and the Beijing-Shanghai High Speed Rail. It connects Hong Kong to the west and Zhuhai and Macau to the west. It is a bridge, island and tunnel. Super large sea crossing. The island tunnel project jointly constructed by China Communications Construction Co., Ltd. is a construction control project of the bridge project. It consists of three major components: immersed tunnels and artificial islands. The immersed tunnel is currently the most difficult immersed tunnel in the world. One of them, starting from the demarcation line between Guangdong and Hong Kong, passes through the Zhujiangkou Tonggu Channel, the Western Fujian Channel, and other major waterways, with a total length of 7440.546 meters.