Science and Technology Daily, Beijing, October 22 (Reporter Wu Yefan) 22nd，The reporter learned from China Railway Shanghai Bureau Group Co., Ltd.，42 meters below sea level on the Zhoushan side of the Jintang Submarine Tunnel of the Yongzhou-Zhou Railway，"Dinghai" shield machine successfully crossed the seawall，Excavation construction from land area to sea area。This marks the beginning of the world’s longest 188bet online casino games high-speed rail tunnel’s “journey through the sea”。
The total length of the Ningbo-Zhou Railway is 76.4 kilometers，After the project is completed and put into operation，It will end the history of no railways in Zhoushan Islands。The Jintang 188bet online casino games Tunnel is a controlled project of the Ningbo-Zhou Railway，Located beneath the Jintang Waterway between Ningbo and Zhoushan in the East China Sea，Full length 16.18 kilometers，The longest 188bet online casino games high-speed rail tunnel in the world。
The length of the construction section using shield tunneling method in Jintang 188bet online casino games Tunnel is 11.21 kilometers。May 16 this year，The "Dinghai" and "Yongzhou" shield machines used in the excavation of the Jintang 188bet online casino games tunnel set off from the Zhoushan side and the Ningbo side at the same time，Opposite excavation construction。The "Dinghaihao" shield machine plans to tunnel 6,270 meters from east to west，"Yongzhou" plans to dig 4940 meters from west to east。Two shield machines will pass through high water pressure and various complex formations，Achieving precise docking on the seabed。
Reporter learned，During the construction 188bet online casino games "Dinghai" shield machine entering the sea area，Will face seawall protection、Many risks such as the drainage board under the seawall entangled with the cutterhead，At the same time, it is also necessary to solve the complex geological cutterhead mud cake、Tool wear，Shield boring machine sealing under high water pressure conditions，As well as technical difficulties such as long-distance excavation and high-precision docking。
Introduction by Zhang Jintao, person in charge of the Jintang 188bet online casino games Tunnel Project of the Ningbo-Zhou Railway of China Railway 11th Bureau，Under construction，The construction team brushes targeted improvements from the tail end of the shield、Shield mud ratio、Start with excavation posture control and other aspects，Continuously strengthen process management，Escort the shield machine to travel smoothly on the seabed。
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