The New Austrian Tunnelling Method
In contrast to the cut-and-cover method, the New Austrian Tunnelling Method (NATM) is a mining technique that was first used in 1955 when building a tunnel for an Austrian hydropower…
Construction methods
There are different methods for building an underground tunnel. These depend on how deep the line is, the soil it passes through and whether there are any buildings on the…
How to build an underground system?
Vienna is a densely populated city that has grown overtime, and it is suitable on geologically complicated land. Various soil formations overlap each other. The Danube and its tributaries are…
The inner workings of a tunnel
Tunnels form microcosms in which you can find equipment for operations and precautions in case of emergencies. The superstructure, which refers to the track bed on which the tracks are…