世界最大直径竖井掘进机“启明号”始发

Group 1 - The "Qiming" machine, the world's largest diameter shaft tunneling machine, has officially commenced construction on the No. 2 shaft of the Chongtai Yangtze River Tunnel, marking a new era in high-speed railway shaft construction in China [2][3] - The Chongtai Yangtze River Tunnel is a key project in the national "two heavy" initiative, connecting Chongming District in Shanghai with Taicang City in Jiangsu Province, with a total length of 14.25 kilometers and three shafts [2] - The No. 2 shaft, located in Taicang City, has a diameter of 24.0 meters and a depth of 56.08 meters, situated in a complex geological environment with high safety risks [2] Group 2 - The project team has innovatively adopted an underwater fully automated mechanical shaft tunneling machine (VSM) for the construction, which addresses technical challenges in ultra-deep water-rich composite strata [3] - The "Qiming" machine has a maximum excavation depth of 75 meters and can withstand water pressure of 8 bar, representing a significant upgrade to intelligent construction methods in shaft tunneling [3] - The successful construction of the No. 2 shaft is crucial for the reception and re-launch of the "Linghang" shield machine, facilitating the overall completion of the Chongtai Yangtze River Tunnel [3]