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Ningbo has built the deepest ultra-large diameter shield working shaft in China: nearly 20 stories high
Release time：2024-08-15click：1
On January 23, according to media reports, the construction of the Ningbo side shield working shaft of the Jintang Submarine Tunnel of the Yongzhou-Zhou Railway, constructed by the China Railway 14th Bureau Group, was completed, laying the foundation for the launch of the shield machine of the world's longest submarine high-speed railway tunnel through the sea. .
It is reported that the Jintang Undersea Tunnel of the Ningbo-Zhou Railway starts from Beilun District, Ningbo City in the west and ends at Jintang Town, Zhoushan City in the east. It has a total length of 16.18 kilometers, of which the shield section is 11.21 kilometers long. It is currently the longest The undersea tunnel with the longest length, the most complex geological conditions and the most difficult construction in the world.
This tunnel uses two 14.57-meter ultra-large-diameter shield machines to tunnel toward each other from the two ends of Ningbo and Zhoushan, and finally achieves precise docking on the seabed with an error of no more than 20 millimeters.
The Ningbo side shield working shaft completed this time is 22.6 meters long, 21.1 meters wide and 58.13 meters deep. It consists of 9 underground layers, which is equivalent to a 20-story building. It is currently the largest in the country. The deepest ultra-large diameter shield working shaft.
After the completion of the Ningbo-Zhouzhou Railway, railway access from Ningbo to Zhoushan can be achieved within 30 minutes, which is of great significance for improving the layout of the railway network and promoting the development of tourism along the line.
