The world’s longest immersed tube tunnel for trains and cars.

The Fehmarnbelt tunnel project will be approximately 19km long, accommodating a four lane motorway and a double track railway line between Denmark and Germany. The crossing is planned to be a reinforced concrete immersed tube tunnel connecting the Danish Island of Lolland with the German Island of Fehmarn. It is approximately 19km long and when completed will be the world’s longest tunnel of its type.

Rendel was appointed by Spanish contractor Fomento de Construcciones y Contratas (FCC) to carry out a study of the possible construction methods and casting basin configurations for the proposed Fehmarnbelt tunnel. This involved reviewing the Øresund production line method and in particular how the Øresund production facility operated, what problems were overcome, and the need for specialist advice and specialist sub-contracts, should similar methods be used for the Fehmarnbelt Fixed Link.

In addition, Rendel was retained by FCC, the lead contractor for the Immersia Consortium (comprising FCC Construcción, S.A. (Spain), N.V. Besix S.A. (Belgium) and Jan De Nul NV (Belgium)) who have successfully pre-qualified for the construction of the north and south tunnels.

Design of tunnel built by mining construction method