"Nanjing Yangtze River Tunnel: The 'Megastar' Challenges 13 Strata and Sets Three World Records"
The Nanjing Yangtze River Tunnel has a total investment of 3.3 billion yuan and is attracting great attention from the domestic and international underground engineering communities due to its challenges of six world-class difficulties: high water pressure, super large shield diameter, complex geology, shallow covering soil layer, strong permeability, and long excavation distance.