Longest Rail Tunnels In the World
This apps provides Longest Rail Tunnels In the World.
1. Seikan Tunnel Japan
The 53.85km Seikan tunnel in Japan is the longest and deepest rail tunnel in the world. It passes through Tsugaru Strait connecting the Hokkaido and Honshu islands.It was built 100m below the seabed and includes a 23.3km submarine portion. It was officially opened in March 1988 and is used for the operation of express trains.The tunnel was sponsored by Japan Railway Construction, Transport and Technology Agency and is operated by JR Hokkaido. The internal height and width of the tunnel is 7.85m and 9.7m respectively.The tunnel was built using 168,000t of steel, 1.74 million cubic metres of concrete and 2,860t of explosives. Seikan Construction Bureau was the main construction contractor. Two stations, Tappi Kaitei and Yoshioka Kaitei, are located inside the tunnel.
2. Channel Tunnel UK
The 50.5km long Channel tunnel, located on the English Channel in the UK and France borders, is the longest undersea rail tunnel in the world. It connects Folkestone in Kent, UK, to Coquelles in Pas de Calais, France. The tunnel was opened for operations in 1994 after nearly six years of construction and cost $14.7bn. It recently won the Global Engineering Century Award by the international federation of civil engineering consultants, FIDIC.The two terminals are linked by three tunnels, including a 9.3km underground tunnel in UK, 38km undersea tunnel and 3.2km underground tunnel in France. In addition there is a service tunnel which allows access to maintenance and emergency rescue teams. The three rail tunnels have a diameter of 7.6m, whereas the service tunnel has a diameter of 4.8m. A total of 11 tunnel boring machines (TBM) dug the tunnel, which runs 40m below the English Channel.The UKs first high speed railway line High Speed 1 links central London with Europes rail network through the Channel tunnel. Eurotunnel (ET), a joint bi national company formed by Channel Tunnel Group (UK) and France Manche (France), owns and operates the tunnel.
3. Lotschberg Base Tunnel Switzerland
Lotschberg Base Tunnel, built through the Alps in Switzerland, is the third longest railway tunnel in the world. The 34.6km long tunnel allows passenger and freight trains operated by BLS on the Lotschberg line. The tunnel includes a non ballasted track on which trains run at 250kmph.The tunnel construction began in April 2005 and was completed in 2006. It was opened for full scale operations in December 2007. Around 20% of the tunnel was constructed by using tunnel boring machines, and the rest through conventional blasting techniques. Excavated material in the tunnel amounted to 16 million tonnes.The tunnel was designed with twin single track tubes, but it was only half finished as only one of the tubes was fully equipped, while the second tube was left largely as a shell. The two tubes are interconnected by transverse tunnels at 333m intervals.
4. Guadarrama Rail Tunnel Spain
Guadarrama is the longest twin tube rail tunnel in Spain and fourth longest in the world. The 28.4km tunnel is dug through Sierra de Guadarrama mountain range for the high speed railway between Madrid and Valladolid. The two parallel tunnels are 30m apart, measured from their central axes. The tunnel was constructed between 2002 and 2007 using TBMs built by Herrenknecht and Wirth. Spanish state owned company Administrador de Infraestructuras Ferroviarias (ADIF) sponsored the project. FCC Construction built the northern part of the tunnel.The interior diameter of the tunnel is 8.5m, whereas the excavation diameter is 9.45m. Interconnection passages located every 250m connect the two tunnels. An emergency room located in the middle of tunnel accommodates up to 1,200 people.
5. Taihang Tunnel China
Taihang Tunnel, located in Taihang Mountains in China, is the fifth longest railway tunnel in the world. The 27.8km long twin tube tunnel was built as part of Shijiazhuang Taiyuan railway project to cross the Taihang Mountains. Construction of the tunnel was completed in December 2007. The tunnel passes through Yue Xiao, the main ridge of Taihang Mountains, with a maximum cover of 445m. The left track has a length of 27,839m, while the right track is 27,848m long. The distance between the two tubes is 35m. The tunnel was designed by Poyry.

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