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ALPTRAN SIT: ENGINEERING GEOLOGY OF THE WORLD'S LONGEST TUNNEL SYSTEM (2000)

The Swiss Alptransit System (also called NEAT) is an important element of the new European high speed railway network . This system, which is currently under construction, consists of two railway axes - the Gotthard and Lštschberg Axes - which will pass through the western and eastern parts of Switzerland . Each of these axes consists of 2 to 3 base tunnels, the longest being the two tube Gotthard base tunnel (57 kms in length), which is currently the world' s longest tunnel under construction. 
Reference:
GeoEng 2000, An International conference on Geotechnical & Geological Engineering, 19-24 November 2000, Melbourne, Austrelia
Organization:
ETH Swiss Federal Institute of Technology Zurich, Switzerland
Switzerland
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