China has deployed the world's largest-diameter vertical shaft boring machine, 'Qiming,' to advance construction of the Chongming-Taicang Yangtze River Tunnel, a critical infrastructure project set to enhance regional connectivity this year. The 24-meter-diameter machine, developed domestically, represents a leap forward in tunneling technology and is currently operating 200 meters from the Yangtze River's south bank.
With a height of 13 meters and a maximum digging depth of 75 meters, the Qiming machine is excavating Shaft No.2—a 50-meter vertical structure crucial for the tunnel's ventilation and emergency systems. Engineers highlight that this project addresses unique geological challenges while minimizing environmental impact on the Yangtze River basin.
The Chongming-Taicang tunnel forms part of broader efforts to integrate the Yangtze River Delta's transportation network, a priority for regional development in 2026. Once completed, it will significantly reduce travel times between Jiangsu Province and Shanghai, supporting economic growth and cross-regional collaboration.
