Milling of Steel Bases, Fehmarnbelt Tunnel Construction, Denmark

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: