Deep-middle passage is a cross-sea cluster project integrating "bridge, island, tunnel and underwater communication". The total length of the project is about 24 kilometers, of which the bridge project is about 17 kilometers long. The project adopts the scheme of East Tunnel and West Bridge, with a total length of about 24 kilometers, which is mainly composed of these key structures. The technical standard of bidirectional eight-lane expressway is adopted, and the design speed is100 km/h.
The entire deep-middle passage is scheduled to be completed and opened to traffic in 2024. After opening to traffic, it takes only 30 minutes to go directly from Shenzhen to Zhongshan, which greatly facilitates the communication between the east and west sides of the Pearl River Estuary, completely changes the history that people in western Guangdong have to go through Humen Bridge to and from Shenzhen, and greatly reduces the long-term traffic pressure of Humen Bridge.
Project achievements
1, the longest and widest immersed tube tunnel with steel shell concrete in the world.
The submarine immersed tube tunnel of the deep middle passage is about 5035 meters long. It consists of 32 immersed pipes and 1 final joints, which is the longest, widest and most difficult comprehensive construction project in the world.
2. The world's heaviest reinforced concrete immersed tunnel joint.
The single standard pipe section of the immersed tube tunnel in the deep middle passage is 165m long, 46m wide and 10.6m high, and weighs nearly 80,000 tons, which is equivalent to a medium-sized aircraft carrier. It is the heaviest steel shell concrete immersed tunnel joint in the world.
3. The offshore immersed tube tunnel project with the longest floating distance and the most channel conversion in the world.
It takes nearly 50 kilometers to float from Guishan Island immersed tube prefabrication plant to the immersed tube installation area near West Artificial Island. After seven channel changes, it passes through the busiest Dingling channel in China. It is an offshore immersed tunnel project with the longest floating distance and the most navigation code conversion in the world.
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