The Chongtai Yangtze River Tunnel: High-Speed Rail Underwater
The Chongtai Yangtze River Tunnel just crossed a milestone that most engineering teams only dream about. On March 29, 2026, the world’s largest-diameter high-speed rail TBM — known as “Linghao” (领航号) — completed its 11.18-kilometer underwater crossing beneath the Yangtze River. That’s 23 months of drilling, 89 meters below the river surface, in one of…