China News Service, Nanjing, December 31 (Yangbo Liu Fuchang) On the 31st, as the huge cutterhead of the "Craftsman No. 1" shield machine was slowly rotating, the Jiangyin Jingjiang Yangtze River Tunnel Project contracted by the 14th Bureau of China Railway was tunneled and entered The stage of tackling the hardships at the bottom of the river.
Ten years after the Jiangyin Bridge on the Yangtze River and its north-south connection line opened to traffic, the traffic volume is saturated.
According to the relevant person in charge of the Jiangsu Provincial Transportation Engineering Construction Bureau, the Jiangyin Second River Crossing Channel uses a shield tunnel to cross the Yangtze River. It is a key project approved by the state for the new cross-river channel plan. Construction will start in 2020 and it is planned to be completed and opened to traffic in 2025.
"Craftsman No. 1" shield machine is officially shielded.
Photo by Liu Fuchang
The Jiangyin Jingjiang Yangtze River Tunnel is located between the Jiangyin Bridge and the Taizhou Bridge. The total length of the line is 11.825 kilometers, of which the tunnel is 6.4 kilometers long and the shield tunnel section is 4.9 kilometers long. /Hour, with engineering features such as large diameter, high water pressure, and long distance.
According to You Shaoqiang, the manager of the project department of China Railway 14th Bureau, the deepest part of the tunnel is 82 meters below the river surface. The shield travels through the sand layer with high quartz content for a long distance, and the wear of the cutter head is three times that of the same type of soft soil.
The "Craftsman No. 1" shield machine used in this construction is 165 meters long and has a total weight of about 5,100 tons. It is equipped with a series of advanced technologies such as scraper wear detection, temperature detection, automatic pressure adjustment main drive sealing system, and sound wave advanced geological prediction system. Technology.
It is reported that the completion of the tunnel will greatly ease the traffic pressure of the Jiangyin Yangtze River Bridge, enhance the traffic capacity of the Yangtze River trunk line, and promote the construction of the Yangtze River urban agglomeration and the development of cross-river integration.
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