The complete tunnel system consists of 153.3 km of access tunnels, shafts, railway tunnels, connecting galleries and … Gotthard Base Tunnel Project: the Longest Tunnel in the World under the Alps. All of this is made possible by a great piece of infrastructure, whose construction required the help of some of the leaders in the field.

The project is located in Erstfeld and Bodio, Tessin, Switzerland.This structure was built using the method gripper tbm driving. Measuring 57km-long it is not only the longest railway tunnel in the world but is also a unique masterpiece of engineering. Following 17 years of construction, the new Gotthard Base Tunnel was ceremonially opened on 1 June 2016. Unlike most other tunnels, the Gotthard Base Tunnel passes under several distinct mountain massifs, two of them being major subranges of the Alps, the Glarus Alps and the Saint-Gotthard Massif, with the valley of the Anterior Rhine, the Surselva in …

Measuring 57km-long it is not only the longest railway tunnel in the world but is also a unique masterpiece of engineering. The Gotthard Base Tunnel with its length of 57km will be the longest rail tunnel in the world when The 7400 m long Erstfeld contract section is the northern part of the Gotthard Base Tunnel, also including the construction of two 400 m long underground branch-offs built using the drill-and-blast method followed by CIP concrete lining.

ABSTRACT . The largest tunnel rock recycling facility ever to be created was for the construction of the Gotthard Base Tunnel which took 17 years, finishing in 2016. Jens Classen . During the construction of the Gotthard Base Tunnel, the tunnellers had to bore through a wide variety of different rock strata, from hard granite to crumbly sedimentary rock. Tunnel boring machines carried out 80 per cent of the work in the main tunnels and conventional blasting methods were used for the remaining 20 per cent. Tunnels constructed with TBM tend to be slightly higher in cost than those constructed with conventional construction methods. Gotthard Base Tunnel Project: the Longest Tunnel in the World under the Alps. The 7400 m long Erstfeld contract section is the northern part of the Gotthard Base Tunnel, also including the construction of two 400 m long underground branch-offs built using the drill-and-blast method followed by CIP concrete lining. Accuracy is of the essence if the two ends are to match up in the middle. 3. The main breakthrough at the Gotthard Base Tunnel is a milestone in tunnel construction March 23, 2011 and October 15, 2010: Main breakthrough at the Gotthard Base Tunnel On March 23, 2011 breakthrough was achived in the Western tube and October 15, 2010 in the eastern tube and an “unhindered view of the Mediterranean” has become a reality. At the time when it is completed, the Gotthard Base Tunnel in Switzerland, with a total length of 57 km, will be the longest railway tunnel in the world. Yet being accurate is easier said than done. With a length of 57 kilometres it is not only the world's longest railway tunnel but also a unique masterpiece of engineering. The Gotthard Base Tunnel is being constructed from either side of the mountain, a highly innovative approach. THE GOTTHARD BASE TUNNEL PROJECT IN SWITZERLAND – CONSTRUCTION OF THE WORLD’S LONGEST RAILWAY TUNNEL . A thousand miners take on nature full steam ahead.

After 17 years' construction time, the new Gotthard Base Tunnel was ceremonially opened on June 1, 2016.