Connecting Scandinavia and continental Europe through the world’s longest immersed tunnel

Big scale demands bold engineering

The Fehmarn Belt connection presents multiple technical challenges. The sheer size of the prefabricated tunnel elements requires state-of-the-art solutions for transportation and immersion. This demands a design optimised to maximise production efficiency without compromising quality.

Geotechnical and foundation complexities further add to the immense challenge, demanding experienced engineering to secure stability.

When standard is anything but standard

Each of the 79 prefabricated elements is a whopping 217 metres long – in total, they take up the space of 50 cars after one another. The design demands meticulous attention to detail, especially for rebar placement, to enable rapid production and ensure structural integrity.

In addition to the prefabricated so-called standard tunnel elements, the project features ten specially designed two-storey segments, housing complex systems, such as pumps and sewage facilities, underscoring the engineering sophistication required. 

Bringing people, places and opportunities closer

As the world’s longest immersed road and rail tunnel, spanning 18 kilometres, this landmark project will not only boost cross-border connectivity but also support greener transportation through electric freight trains and promoting public transportation, reducing environmental impact. 

Upon completion, the Fehmarnbelt Fixed Link will bring Europe closer together. Passengers will benefit from significant travel time savings, shaving about an hour off their journey to visit loved ones or conduct business. For freight transport, the connection offers an efficient alternative that enhances supply chains across borders.