地铁11号线开始穿越长江 过长江地铁3条在建4条已开通运营

Core Insights - The Wuhan Metro Line 11 Phase IV project has officially entered the shield tunneling phase with the launch of the "Jiangcheng Pioneer" shield machine, marking a significant milestone in the construction of the Jiangguo Road to National Expo Center North Station section [1][2] Group 1: Project Overview - The Jiangguo section of Line 11 is approximately 4.26 kilometers long, making it the longest underwater tunnel section in the Wuhan Metro system [1] - The tunnel is designed as a single-bore double-track, allowing trains to run in both directions within a single tunnel, with a shield machine cutter head diameter of 12.56 meters, which is twice the size of a standard metro tunnel [1] Group 2: Technology and Design - The "Jiangcheng Pioneer" shield machine is fully domestically produced and designed to handle the complex hydrological and geological conditions of the Yangtze River [2] - The shield machine features a 39% large opening rate design and includes spray ports to wash the cutter head center and mud doors, reducing the likelihood of mud accumulation and blockage [2] Group 3: Team Experience - The project team consists of experienced personnel who previously worked on the successful completion of the shield tunneling for the 12th line, ensuring that lessons learned from past projects are applied to the current construction [1][2]