The Fehmarnbelt road and rail tunnel, currently under construction, will connect Denmark and Germany. Named the Femern Link, this structure is set to become the world’s longest road-rail tunnel, the longest underwater road tunnel, the deepest road-rail tunnel, and the second deepest concrete tunnel globally.
We have a small role in this major infrastructure project! Our task was to achieve a flat surface on eight steel benches, each 7.7 meters long, as well as on eight shorter plates, with a total flatness of less than
1 mm. As seen in one of the photos, we managed to achieve an even better result. To accomplish this, we used the WWTECH HERCULES milling machine, which we designed ourselves, along with a Laser Tracker. An additional challenge was achieving precise mutual positioning of the machined surfaces were significantly distant from each other.
More about the tunnel: