What are the road tunnels in Japan? What is the longest tunnel in Japan?

The scope of this problem is also much larger...

Tanna 1. The longest tunnel in Japan is the Seikan Tunnel.

2. The Seikan Tunnel is an undersea tunnel dug in the Tsugaru Strait between the Aomori area of Honshu and the Hakodate area of Hokkaido, Japan, and is the longest undersea tunnel in the world. After 12 years of construction, the pilot tunnel of the Seikan Tunnel was opened on January 27, 1983, from Amachi, Akibetsu Town, Aomori Prefecture, to Yuri, Chinai-cho, Hokkaido. On March 13, 1988, the Seikan Tunnel was officially opened, ending the history of shipping between Honshu and Hokkaido by sea.

Japan was one of the first countries in the world to start the design and construction of undersea tunnels. Want to know which is the longest tunnel in Japan? Let me tell you more about it.

The longest tunnel in Japan, the Seikan TunnelIntroduction to tunnelsThe Seikan Tunnel consists of 3 tunnels. The total length of the main tunnel is 1 km, including the undersea part, the onshore part of the Honshu side, and the Hokkaido Keiku side of 17 km. The main tunnel is 9 meters wide and 9 meters high, with a cross-section of 80 square meters.

In addition to the main tunnel, there are two auxiliary tunnels: one is a pilot tunnel for subsea geology; The second is the operation tunnel for transporting equipment and transporting sand and gravel. The two tunnels are 4 meters high and 5 meters wide, and both are located on the seabed.

The construction took 24 years and cost a total of 689 billion yen. The undersea section of the tunnel is kilometre long. The maximum water depth is 140 meters, the minimum overburden thickness is 100 meters, and the construction is carried out by the advanced pilot pit and parallel pilot pit method, so as to find out the geological conditions in advance and use it for ventilation, drainage and slag removal.

The distance between the center line of the parallel guide pit and the main hole is 30 meters, and the two are connected by transverse passages every 600 meters. The onshore part of the Honshu end is 17 kilometers long, and the Hokkaido end is 17 kilometers long, and each has 3 inclined shafts and 1 vertical shaft, and the bottom of the inclined shaft is excavated from the bottom of the inclined shaft, which is centered under the main hole and the parallel pilot pit.

Construction historyThe difficulty of the construction of the Seikan Tunnel is unimaginable, and it has undergone an arduous construction process. The entire Seikan Tunnel is composed of three parts: the Clear Road Tunnel, the ** Tunnel and the Main Tunnel. The Clear Road Tunnel was built for geological exploration, ventilation and seawater infiltration, while the Tunnel was responsible for clearing the material of the Road Clearing Tunnel and the Main Tunnel, both of which have a diameter of 4 meters.

The main tunnel has a diameter of 11 meters and is used to lay the double line of the Shinkansen railway and the narrower ordinary railway. Since the construction of the main tunnel began in 1971, two excavation teams of 1,800 engineers and workers from the north and south were excavated at the same time. The excavation team was slow because the excavation team was working in 28 percent temperature and 80% humidity, and the conditions were extremely difficult, and a group of personnel had to be rotated every four hours.

After so many years, the Seikan Tunnel is still of great significance to Japan, and the Japanese road authorities plan to lay large-capacity optical fiber communication cables, high-voltage transmission lines, natural gas pipelines, etc. in the tunnel to make comprehensive use of the tunnel and improve economic efficiency. With the development of science and technology, more countries in the world have begun to build undersea tunnels. The advantages of the undersea tunnel are obvious, it not only greatly shortens the traffic distance, the driving does not have to be affected by natural conditions, and the undersea tunnel does not occupy an area, does not hinder navigation, does not affect the ecological environment, is a very safe all-weather strait channel.

In this regard, the relevant person in charge of China Railway Tunnel Group said: Liang Xi "compared with the way of building a sea bridge, the submarine tunnel has the characteristics of all-weather traffic, and has the advantages of not destroying shipping, not affecting the landscape, not occupying land or less demolition, and the traffic is not affected by strong winds and fog, which is a better transportation facility." ”

It is an island country, and Zhou Yin and the chaos are covered by the sea, how can there be a road to other countries?

According to Agence France-Presse, BAI Japanese tunnel developer DU27 dug the world's longest land-based ZHI tunnel

On the same day, they dug through the last of the kilometer-long tunnel.

Accommodating a section of rock bed.

However, this tunnel through Mt. Hakkoda will only hold the name of the world's longest tunnel for a few months.

A total of one kilometer of tunnels in Switzerland and one in Spain will be completed this year. The concrete reinforcement of the inner wall of the Hakkodayama Tunnel and the laying of the railway will not be completed in a few years.

The tunnel is located near Aomori City, a prefectural office in Aomori Prefecture in northeastern Honshu, and will be part of an extension of the Shinkansen line scheduled to open in 2010. Prior to its breakthrough, the Iwate Ichinohe Tunnel, which was a kilometer-long tunnel on the same railway line, was the longest land tunnel in Japan.

The 66.7 billion yen project will be carried out in six sections, each about one kilometer long.

The tunnel passes through the eastern side of the Hakkoda volcanic complex, a group of mountains with a peak height of 1,585 meters. Due to the dense number of hot springs in this area and the snow covering the mountains in winter, the project is extremely difficult.

Currently, the Hakkodayama Tunnel is the third longest tunnel, and the top two are both undersea tunnels. The longest tunnel is the Kiyoki Tunnel, which connects Honshu and Hokkaido in Japan. The second longest is the Anglo-French Channel Tunnel, which runs through the English Channel and is a kilometre.

The National Tunnel of Japan shall be noted to be more than three kilometers long for Japan.

The tunnel is identified as the "DAO Long Tunnel", Ou Hui.

The continent is defined as a "long tunnel" with a length of more than four kilometers, of which the Seikan Tunnel is the most famous. Highway Tunnel: The Xianshan Tunnel is a kilometer-long tunnel with a height of about 440 meters and was officially broken through in 1937.

The longest road tunnel in Japan is the Kan-Etsu Tunnel on the Kan-Etsu Expressway, which is a two-hole, one-way, four-lane tunnel with a length of kilometers. The second-longest Yamanote Tunnel is located beneath the city of Tokyo, and when completed in 2013, it will be longer than the Kanetsu Tunnel. Railway Tunnels:

The Hakkoda Tunnel is under construction and is scheduled to become the longest overland railway tunnel in Japan by 2010. The Seikan Tunnel is currently the longest undersea tunnel built in the world, with a length of one kilometer.