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The extent of tunnel refurbishment has increased constantly in recent years. The particular importance of meticulous and thought‐out planning has been demonstrated on recent projects. The original drawings often provide an insufficient basis for design work and have to be checked, verified or supplemented by targeted investigation measures. A brief glance at the list of claims from a refurbishment...
The construction of the Tauern Tunnel in the early 1970s was a milestone in the development of the New Austrian Tunnelling Method (NATM). The experience gained then formed the basis for the development of new technologies, which made tunnelling more efficient and safer and were applied consistently in the design and construction of the second tube. The present article describes the geological conditions,...
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