A 1,533m suspension bridge has been completed in Norway.
The country’s second-longest suspension bridge, the Hålogaland bridge opened to traffic in northern Norway, improving road safety by moving traffic away from routes prone to landslide.
Cowi, the engineering firm behind the impressive bridge, has also worked on major infrastructure projects in the UK including the Battersea Cable Tunnel and the Lower Thames Crossing.
The Hålogaland bridge is the second longest suspension bridge in Norway with a 1,533m total length, connecting the town of Narvik and the village of Bjerkvik. The span is a closed steel box girder design and stretches 1,145m, with side spans of 240m and 149m.
On the Narvik side, the viaduct was constructed using a specially designed movable casting carriage almost 120m long and clocking in at 725 tonnes.
The Øyjord side viaduct was constructed on the ground and lifted into place.
The bridge’s foundations are comprised of five caissons, 10m in diameter, and 30m below the surface of the Rombaksfjorden.
Hålogaland Bridge, designed to blend with the natural surroundings
The caissons were constructed by slip forming, whereby concrete is cast in layers in a slip form that is raised at regular intervals. This is the first permitted use of slip forming in a project by the Norwegian Public Roads Administration.
The A-frame pylons were designed specifically to complement and blend with the natural landscape and stand at 179m tall.
The bridge will have two main cables with a length of 1,621m and diameter of 47cm.
The design team opted for a less-is-more approach to camouflage the bridge into the surrounding backdrop.
Dissing and Weitling director of bridges Poul Ove Jensen, said that the bridge was in harmony with the landscape.
“The bridge is located in a dramatic and magnificent scenery and for this reason, it has been our goal to design the bridge in respect of the natural surroundings,” he said. “The anchor blocks are recessed in the hills and the only visible parts are the large concrete cones that receives the cable. Even the colours for the bridge are in harmony with the landscape’s colours.”
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