世界最大直径高铁盾构机“领航号”掘进突破万米大关

Core Viewpoint - The successful breakthrough of the "Pioneer" shield machine in the Chongtai Yangtze River Tunnel marks a significant step towards achieving a high-speed rail crossing of the Yangtze River at a speed of 350 km/h, with only 1.3 kilometers remaining to reach the southern bank of the river [1]. Group 1: Project Overview - The Chongtai Yangtze River Tunnel is a key project in China's "Eight Vertical and Eight Horizontal" high-speed railway network, connecting Chongming District in Shanghai with Taicang City in Jiangsu Province [2]. - The tunnel has a total length of 14.25 kilometers, with the shield section measuring 13.201 kilometers, featuring a maximum single-head excavation distance of 11.325 kilometers from the third to the second shaft [2]. - The tunnel is characterized by its large diameter of 15.4 meters, a water depth of 89 meters, and a design speed of 350 km/h, making it the highest standard, longest excavation distance, and largest scale high-speed rail river crossing project in the world [2]. Group 2: Technological Advancements - The "Pioneer" shield machine is equipped with the world's most advanced brain system, the I-TBM system, which enables autonomous decision-making and intelligent analysis during the excavation process [1]. - Key technological features include adaptive pressure control within the shield chamber, cloud-based predictive data, autonomous navigation, and self-adjusting muck circulation, resulting in smoother operations compared to manual control [1]. - The project has achieved a world record for monthly excavation of 718 meters for 15-meter high-speed rail tunnels, demonstrating the effectiveness of fully algorithm-controlled, unmanned intelligent excavation [1].