Core Viewpoint - The completion of the Jiangyin-Jingjiang Yangtze River Tunnel marks a significant technological breakthrough in tunnel engineering in China, overcoming world-class challenges related to high water pressure and strong permeable strata [1] Group 1: Project Overview - The Jiangyin-Jingjiang Yangtze River Tunnel spans approximately 11.825 kilometers, with an underwater shield section of about 4,937 meters and a diameter of 16.09 meters [1] - The project faced complex geological conditions, including high water pressure and large diameter requirements [1] Group 2: Technological Innovations - The project team from China Communications First Highway Engineering Group developed a complete set of technologies for high water pressure and strong permeable sand layer tunneling, which has broken the length limit for single-shield tunneling [1] - This technological advancement enables the construction of ultra-long-distance shield tunnels, providing valuable experience and technical reserves for future mega-engineering projects across rivers and seas [1] Group 3: Economic and Regional Impact - As a key project in the comprehensive transportation corridor planning of the Yangtze River Economic Belt, the tunnel will significantly alleviate traffic pressure on the Jiangyin Yangtze River Bridge and enhance the crossing capacity of the Yangtze River main line [1] - The completion of the tunnel is expected to promote high-quality integrated development in the Yangtze River Delta region [1]