!!!Tunnelbauweise, Neue Österreichische

New Austrian Tunnelling Method: L. v. Rabcewicz had obtained 
the first patent for a new tunnelling method in 1948, which formed the 
basis for the New Austrian Tunnelling Method developed between 
1957-1965: The essential features of the new method are that the 
ground formations are treated as supporting structures with a flexible 
concrete lining as a modified surface, and the tunnel is seen, for 
calculation purposes, as a closed, thick-walled tube. The New Austrian 
Tunelling Method is used all over the world for building tunnels for 
roads, railways and for underground railway systems.

!Literature
F. Quellmelz, Die Neue Oestereichische Tunnelbauweise, 
1987.

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7.86 km</TD>


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