It is reported that the Zhanjiang Bay Subsea Tunnel is a full-line controlled project, with a single hole and two lines. The shield section is 7,551 meters, the shield excavation diameter is 14.33 meters, and the outer diameter of the segment is 13.8 meters. Shield Tunnel of High-speed Railway.
The main channel of the Zhanjiang Bay Subsea Tunnel passed this time is 195 meters long and is the most important marine transportation line in the Zhanjiang Bay waters.The maximum water depth is 20.8 meters, the lowest point is covered with soil of 16.7 meters, and the maximum water pressure is 6 bar, which is equivalent to bear 6 kg of pressure on an area the size of a fingernail, and the construction difficulty and risk are very high.
At present, the “Yongxing” shield machine has accumulated 2,770 meters of excavation footage, completed 1,385 rings, and entered the sea area for more than 1,300 meters. It has successfully passed through the deepest part of Zhanjiang Bay.
The main line of the Guangzhou-Zhanjiang high-speed railway is about 401 kilometers long. The line starts from Guangzhou Railway Station, passes through cities such as Foshan, Zhaoqing, Yunfu, Yangjiang, Maoming, Zhanjiang, etc., and finally ends at Zhanjiang North Station and connects to Zhanjiang Hub in the west. The total investment amount is estimated 99.8 billion yuan,With a designed driving speed of 350 kilometers per hour, it is the high-speed rail project with the longest mileage and the largest investment in Guangdong Province.