They use a tunnel boring machine to bore a tunnel with a 45° slope.
They do go into the mechanics of how they make this insanely massive machine drive up a grade that steep, and how they ensure it doesn't slide backward.
I was glued to the screen more than with most movies.
If you like channels like Practical Engineering, you will enjoy this.
They do go into the mechanics of how they make this insanely massive machine drive up a grade that steep, and how they ensure it doesn't slide backward.
I was glued to the screen more than with most movies.
If you like channels like Practical Engineering, you will enjoy this.