Core Points - A large diameter shield tunneling machine with a diameter of 14 meters has been launched in Changsha, Hunan, for the Longgang Tunnel project of the Shenzhen-Shenshan High-Speed Railway [1][3] - The Shenzhen-Shenshan High-Speed Railway is the first intercity high-speed railway fully constructed by a single city in the Guangdong-Hong Kong-Macao Greater Bay Area, with a total length of 125.5 kilometers and a design speed of 350 kilometers per hour [3][4] - The Longgang Tunnel, a key project undertaken by China Railway 14th Bureau, is 10,307 meters long and features a dual-line single tunnel design, with a maximum depth of 97 meters and a maximum rock strength of 83 MPa [3][4] Technical Specifications - The shield machine has a cutting diameter of 14.31 meters, a maximum thrust of 21,300 tons, and a total power of 12,000 kilowatts, weighing 3,600 tons [4] - It features advanced technology including a pressure-balanced design, 126 rolling cutters, and intelligent excavation assistance systems such as geological forecasting and cutter detection [4] - The machine will be transported to the construction site in Shenzhen via a combination of land and sea transport, with 132 large components being disassembled for transport [4]
14米级超大直径盾构机长沙下线 将用于深汕高铁龙岗隧道
Zhong Guo Xin Wen Wang·2025-10-24 12:29