我国自主研制，全球最大直径竖井掘进机“启明号”始发

Core Viewpoint - The launch of the "Qiming" vertical shaft tunneling machine marks a new era in high-speed railway vertical shaft construction in China, specifically for the Chongtai Yangtze River Tunnel project [1][3]. Group 1: Project Overview - The Chongtai Yangtze River Tunnel is a critical control project for the Jiangsu section of the "Two Heavy" project high-speed railway, connecting Chongming District in Shanghai with Taicang City in Jiangsu [3]. - The tunnel spans a total length of 14.25 kilometers and includes three vertical shafts, with the No. 2 shaft located in the Fubridge Town of Taicang, serving as a key site for the reception and re-launch of the "Linghang" shield machine [3]. - The No. 2 shaft has a diameter of 24.0 meters and a digging depth of 56.08 meters, situated 200 meters from the southern embankment of the Yangtze River, facing complex geological conditions and high safety risks [3][4]. Group 2: Technological Innovations - The "Qiming" tunneling machine is the world's largest diameter vertical shaft tunneling machine, featuring advanced systems such as main drive, leg support, and dual-arm cutting [4]. - It incorporates innovative technologies like adaptive tunneling, self-guided control, parameter self-adjustment, and autonomous assembly, enabling intelligent tunneling and lining synchronization with minimal human intervention [4]. - The machine addresses significant technical challenges in ultra-deep, water-rich composite strata, facilitating a transition from traditional construction methods to an intelligent construction model with reduced personnel on-site [4]. Group 3: Project Significance - The successful construction of the No. 2 shaft lays a solid foundation for the reception, re-launch, and overall completion of the "Linghang" shield machine, which is crucial for the tunnel's full operation [4]. - Once completed, the tunnel will significantly shorten travel time between Shanghai and Jiangsu, allowing high-speed trains to cross the river without reducing speed, thus ending the historical lack of high-speed rail access to Chongming Island [4]. - This project is vital for enhancing the integration of the Yangtze River Economic Belt and the high-quality development of the Yangtze River Delta region [4].