The picture shows the Shantou Bay Submarine High-speed Rail Tunnel Project
Recently, in the field of infrastructure construction, we once again created a miracle. The world's first submarine high-speed rail tunnel is about to be completed by China. This tunnel It is the Shantou Bay Submarine High-speed Rail Tunnel. How good is this project? This tunnel has also created many world firsts, such as the most difficult to build in the world, the fastest design speed in the world, etc. According to reports, the tunnel is designed to reach a speed of 350 kilometers per hour, which can pass China's current fastest Fuxing_ span13span high-speed rail EMU.
The picture shows the submarine tunnel excavation site
As of now, for many countries, the construction of high-speed rail tunnels under the sea is still an unthinkable thing. The main method of this work is to lay immersed pipes. The main body of the tunnel is constructed by hoisting the immersed pipes section by section, and finally fixed by locking materials. However, the construction method of immersed pipes is generally only suitable for the construction of road tunnels, because High-speed vehicles such as trains and high-speed railways with speeds of hundreds of kilometers per hour cannot bear the kinetic energy of immersed tubes. At this time, shield machines must be used to build tunnels deeper under the sea.
The Shantou Bay submarine high-speed rail tunnel built in China is like this, with a buried depth of 12 meters. Although this can solve the problem of kinetic energy caused by high-speed trains, the huge pressure on the seabed will bring a lot of construction Trouble, the shield machine produced in most countries in the world can only work in an environment of 0.4 to 0.5 MPa at most. If the pressure exceeds the pressure, the shield machine is likely to be damaged and cause construction In addition, the construction of the Shantou Bay submarine high-speed rail tunnel still needs to overcome extremely harsh geological conditions.
The picture shows the Shantou Bay submarine high-speed rail tunnel
The Shantou Bay submarine high-speed rail tunnel is located in the Pacific Rim volcanic seismic zone, which also means that it is a must-have area for earthquakes of magnitude 8 The ability to withstand a magnitude 9 earthquake will not be damaged when an earthquake occurs on the seabed, which undoubtedly increases the difficulty of construction. On the other hand, the seabed environment of Shantou Bay is complex and changeable, and the distribution of soft and hard rocks is uneven, which also makes the shield machine The blades need to be replaced frequently, and the construction efficiency is greatly reduced. In order to solve these problems, China has given full play to its advantages in large-scale engineering equipment technology and customized the world's largest precision shield machine for Shantou Bay. It can not only withstand The high pressure is strong, and the blades can even be replaced directly under the sea. The emergence of this shield machine has solved the difficult problem of the construction of the high-speed rail tunnel.
After the Shantou Bay high-speed rail tunnel is put into use, it will greatly promote the local economic development. In the past few years, although Shantou is located at the junction of Xiamen and the Pearl River Delta, due to the extremely inconvenient transportation, some The region does not even have a high-speed rail, and economic development is therefore greatly restricted. For this reason, the local government has been committed to creating a more attractive business environment. This big problem was solved after the completion of the Shantou Bay high-speed rail tunnel. With a fast passage, the transportation between the Pearl River Delta and the Xiamen urban agglomeration will be more convenient. With the economic radiation of the two regions, the economic development of the entire eastern Guangdong will reach a new level.
The picture shows the Yongping shield machine
, which is a difficult subsea project like the Shantou Bay High Speed Rail Tunnel, which is involved in the construction of the Shantou Bay Subsea Tunnel. The best test and training of China's infrastructure technology. I believe that after solving a series of technical problems of this type and getting sufficient training, China will no longer dream of using its strong infrastructure to develop the southern waters.
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