China’s tunneling marvel hits construction milestone
The shield machine conducts a pipe segment lifting operation in Shanghai, Oct 20, 2024. [Photo/Xinhua] On Oct 20, China’s self-developed world’s largest diameter high-speed railway shield machine, called Linghang, excavated its 1,000th ring segment in the construction of the Chongtai Yangtze River Tunnel on the Shanghai-Chongqing-Chengdu High-speed Railway. This tunnel, spanning 14.25 kilometers, links the…









