The French company « Eiffage Génie Civil », the bureau greisch and the Norvegian engineering office Afry won the competition « Design & Build » for the construction of the new 4-lane road section between Langangen and Rugtvedt, in Norway.
This 17 kilometers long road includes 6.6 kilometers of tunnels and several bridges. The most important is the Grenland bridge, which will be built parallel to the existing bridge. It crosses the Frierfjord , a fjord which separates the municipalities of Porsgrunn and Bamble in the county of Vestfold and Telemark.
The bureau greisch carried out the pre-design of the 604-meter long cable-stayed bridge, consisting of a 330-metre main span and approach spans. The retaining ropes of the single H-shaped pylon are anchored in the hill. The 13-meter wide deck is a mixed steel/concrete caisson.
This is a complex and demanding challenge, remarks in a press release the contracting authority, the engineering office Nye Veier, stressing that the offer from Eiffage and its partners was the best application, with highly qualified staff and extensive international experience.
The next few weeks will be devoted to the optimization of the preliminary project. The final contract is expected to be signed in December. The new road should be up and running by 2025.