China to build world's fastest underwater high-speed rail after record-breaking river tunnel
China has completed excavating a tunnel beneath the Yangtze River, the country's largest waterway, marking a major milestone for a project that will connect Shanghai's Chongming Island with neighboring Jiangsu Province and expand the national high-speed rail network.
China is set to construct the world's fastest underwater high-speed rail, following the completion of a record-breaking river tunnel beneath the Yangtze River. The achievement, realized by the country's largest-diameter tunnel boring machine, sets a new benchmark for underwater tunnel construction. This 14-kilometer-long tunnel, located 89 meters below the river, will connect Chongming Island, China's third-largest island, with mainland China's high-speed rail network.
The project, expected to be completed by the end of this year, will see trains traveling at a speed of 350 kilometers per hour, with the journey beneath the river taking approximately two minutes. Engineers have emphasized the need for millimeter-level precision to ensure the safety and comfort of passengers traveling at such high speeds.
The Chongtai Yangtze River Tunnel, costing over 7.1 billion yuan, is a crucial component of the Shanghai–Chongqing–Chengdu High-Speed Railway, one of China's flagship transportation corridors linking the country's eastern coast with its interior.
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