China-built 'Qiming,' world's largest SBR, debuts key Yangtze River high-speed rail tunnel

Описание: China’s world’s largest-diameter SBR "Qiming" has launched construction on the Chongtai Yangtze River Tunnel (a key link of Shanghai-Chongqing-Chengdu High-Speed Railway).

Tailored for the tunnel’s complex riverside geological conditions, it adopts innovative technologies (unmanned downhole operation, non-dewatering excavation, synchronized construction) to ensure safety and efficiency, cutting the construction period by at least half a year for Shaft No.2.

The 14.25km tunnel, currently the longest and highest-standard high-speed rail tunnel under the Yangtze River, will shorten Shanghai-Jiangsu travel time and enable bullet trains to pass under the Yangtze without slowing down once completed.


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