China Railway Shanghai Bureau Group Co., Ltd. introduced that recently, the shield machine "Pilotage" of Chongtai Yangtze River Tunnel, the world’s largest diameter high-speed rail shield machine independently developed by China, completed the cutter head welding and will be used for the construction of the new Shanghai-Nanjing-Hefei high-speed rail Chongtai Yangtze River Tunnel. The tunnel connects Chongming District of Shanghai and Taicang City of Jiangsu Province, with a total length of 14,250 meters and a design speed of 350 kilometers per hour. See ↓
The cutter head of "Pilotage" shield machine has a diameter of 15.4 meters and a total weight of 440 tons. After the cutter head is welded, the cutter head will be subjected to ultrasonic flaw detection, flatness, roundness and cutter head painting for all-round "physical examination" to ensure the smooth combination of the cutter head and the main engine.
Chongtai Yangtze River Tunnel is the control project of Shanghai-Nanjing-Hefei high-speed railway, and it is also the project with the longest contract period. The tunnel connects Chongming District of Shanghai and Taicang City of Jiangsu Province, with a total length of 14,250 meters and a design speed of 350 kilometers per hour. It is a single-hole and double-line design, and it is the world-class high-speed rail cross-river tunnel project with the highest construction standard, the longest driving distance and the largest scale. Chongtai Yangtze River Tunnel is constructed by cut and cover and shield method.
It is reported that the "Pilotage" shield machine will start from No.3 well in Chongming District, Shanghai, and tunnel 11,325.5 meters across the Yangtze River to No.2 shaft in Taicang City, Jiangsu Province. The shield construction has the characteristics of large section, high water pressure, complex geological conditions, long shield tunneling distance and sensitive environment.
Shanghai-Nanjing-Hefei high-speed railway is the eastern route of Shanghai-Chongqing-Chengdu high-speed railway and an important part of the national "eight vertical and eight horizontal" high-speed railway network along the Yangtze River, which undertakes the transportation of the main road network passenger flow along the Yangtze River and the coastal and Beijing-Shanghai passages directly to Shanghai. After the completion of the project, a fast new channel will be built between Shanghai metropolitan area, Nanjing metropolitan area and Hefei metropolitan area, which is of great significance for optimizing the layout of railway network along the Yangtze River, serving the coordinated development of the Yangtze River Economic Belt and promoting the high-quality integrated development of the Yangtze River Delta.
Original title: "The world’s largest diameter high-speed rail shield machine independently developed by China-Chongtai Yangtze River Tunnel" Pilotage "completed cutter head welding"
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