© Emile Mentz
Luxembourg-based firm Tractel is revolutionising tunnel construction with its innovative machinery, playing a pivotal role in the construction of Europe's longest immersed tunnel between Germany and Denmark.
A new 18-km-long tunnel is currently being constructed between Germany and Denmark, a project that represents one of Europe's largest construction sites. The tunnel is set to become the longest immersed tunnel with a maximum depth of 40 metres underwater, and Luxembourgish expertise is playing a crucial role in the realisation of this project.
The concrete segments of the Fehmarnbelt Tunnel are pre-manufactured on land. They are then transported to sea with boats and carefully submerged into place. The segments feature openings at both the front and rear to prevent water from accumulating during the positioning process. To facilitate this, a specialised machine, engineered and constructed by Luxembourg-based firm Tractel in Foetz, is employed. The innovative heavy-duty machinery is tasked with gradually enlarging these openings, or "portals", enabling the segments to be securely positioned in their designated locations.
Tractel has so far built four prototypes, with two already in use at the German-Danish site. The machine was entirely developed and assembled in the Grand Duchy. Up until recently, both the technology and exact functioning of the custom-made machine were kept secret. Building time and overall costs are being reduced by using prefabricated elements and hopes are that this technology can also be used in future projects.
Established in Luxembourg in 1948, Tractel has grown into a world-renowned expert in safety and lifting equipment. Employing 54 individuals locally, the company has distinguished itself through its flagship product, the Tirfor. This is a versatile device that enables the secure pulling, lifting, and lowering of heavy loads.
Nicola Prevenna has been with Tractel for 30 years and is the leading engineer responsible for the new device.
On Wednesday afternoon, Grand Duke Henri and Minister for Mobility and Public Works Yuriko Backes visited Tractel to see the machine in action. The device has in the meantime also received an award for its innovative features.
