China plans to build the world's longest underwater tunnel

China swung to a new record project and announced its intention to build the longest underwater tunnel in the world, which will connect the two ports of Dalian in Liaoning Province and Yantai in Shandong Province.

Chinese engineers are developing the project to create the longest tunnel in the world, which will be located under water and is connected to two ports of Dalian in Liaoning Province and Yantai in Shandong Province. Its length will be 123 km.

The longest railway tunnel "Seikan", which runs under the Tsugaru Strait, connecting Aomori Prefecture on the Japanese island of Honshu and Hokkaido, has a length of 53, 85 km underwater fragments of 23, 3 km. The tunnel is lowered to a depth of approximately 240 meters, 100 meters below the seabed. It is the most deeply buried beneath the sea floor and the longest railway tunnel in the world.

It is expected that there will be three parallel tunnel created for the automotive, railway transport, as well as rescue services. They are located at a depth of 30 m of the bottom, the diameter of each of them is 30 m.

The idea to build a new tunnel is not new - it appeared in 1996. Then the cost was estimated at $ 10 billion, the project is now estimated at $ 36 billion. Construction is expected to be completed by 2010. But the project did not have realized.

Under the new project, the construction of the longest tunnel in the world will begin in 2015-2016 and will be completed in 2026.