The Chongtai Tunnel, which spans 14.25 kilometers, is a key component of the Shanghai-Chongqing-Chengdu high-speed railway, (13.20km TBM tunnel)
https://theconstructiondata.com/chongtai-tunnel-a-milestone-in-chinas-intelligent-shield-tunneling/
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://theconstructiondata.com/chongtai-tunnel-a-milestone-in-chinas-intelligent-shield-tunneling/
Chongtai Tunnel: A Milestone in China’s Intelligent Shield Tunneling
theconstructiondata.comChina’s latest advancements in intelligent tunnel boring technology have been successfully demonstrated in the Chongtai Tunnel under the Yangtze River,