The cross-harbour tunnel of Hong Kong-Zhuhai-Macao Bridge is 5.6 kilometers long, which is the longest immersed tunnel in the world and the only deep-buried immersed tunnel. It is also the first offshore immersed tube tunnel in China. The submarine part is about 5664 meters, which consists of 33 giant immersed tubes and 1 final joint of closure section. The maximum installation depth exceeds 40 meters.
2065438+July 7, 2007, the main project of Hong Kong-Zhuhai-Macao Bridge ushered in an all-round historical moment. Following the completion of the main bridge in September 2065438+2006, the cross-harbour tunnel of the Hong Kong-Zhuhai-Macao Bridge was successfully completed on the same day. By the end of the year, the Hong Kong-Zhuhai-Macao Bridge will be completed and opened to traffic, and the land journey from Hong Kong to Zhuhai and Macao will be shortened from 3.5 hours to half an hour.
In order to make way for the Pearl River Estuary, the busiest waterway in the world, the main project of the Hong Kong-Zhuhai-Macao Bridge uses a cross-harbour tunnel with a total length of 6.7 kilometers. This is the first immersed tube tunnel at sea in China, and it is also the immersed tube tunnel with the largest buried depth and the highest comprehensive technical difficulty in the world. Two artificial islands of each100000 square meters undertake the bridge-tunnel conversion function.
Hong Kong-Zhuhai-Macao Bridge:
The bridge is a super-large cross-sea passage connecting Hong Kong, Zhuhai and Macao, integrating bridge, island and tunnel, with a total length of 55 kilometers. It is the longest sea-crossing bridge in the world, and it has the longest mileage, the most investment and the most difficult construction in the construction history of China, which is of great strategic significance for promoting the further economic development of Hongkong, Macao and the west coast of the Pearl River Delta.
The cost of the whole bridge is more than 72 billion yuan, which is jointly funded by the central government and the governments of Guangdong, Hong Kong and Macao. It is planned to charge for 50 years, and the designed service life is 1.20 years. After completion, it can resist an earthquake of magnitude 8. The main project of the Hong Kong-Zhuhai-Macao Bridge, the subsea tunnel project, is the control project of the Hong Kong-Zhuhai-Macao Bridge, and it is also the last through part.