Re:World's longest and deepest rail tunnel to open in Switze...
by CaptainZapp on Wednesday June 01, 2016 @10:30AM
(#11814589)
There are things that can't be planned for.
One of the major problems detected was the fact that they had to drill through dolostone, which is a huge technological challenge. When mixed with water it results in a soupy mixture, which is almost impossible to work with in drilling a tunnel.
The did exploration drillings in 1993, but engineers where still pretty worried.
It was only in 2008 that the engineers lost the last of their concerns.
Such a huge project comes with technical uncertainties. What do you want to do about it?
If your car engine breaks down you did a bad route planning?