Come discover tunnel world

12 13 COME DISCOVER TUNNEL WORLD We are all familiar with tunnels – at least the railway and road tunnels that we all travel through. In comparison to them, the Brenner Base Tunnel runs even deeper below the ground. How do you know what kind of rock is inside the mountain where you want to build the tunnels? Take a look at the fascinating drill cores. None of them look like any of the others. Find out all there is to know about tunnel construction! But have you ever seen the “underground factory” that is used to build a tunnel like this? What happens to the excavated rock? And how can you be sure that these “holes” will actually meet where they are supposed to, if you are digging from more than one direction at the same time? Find out how many different kinds of TBM there are and what a tubbing ring is. Only real tunnel experts know things like that. 8. Tunnel boring machine (TBM) Wow, what’s this? An oversized drilling machine? A hi-tech “mole”? 7. The Brenner Base Tunnel Project Wow! This long railway tunnel is being built right near us. Who is working on it? Where are the construction sites? Why is it so hot in the tunnel?