Svinesund Bridge

The Svinesund Bridge is a compression arch suspended-deck bridge crossing Iddefjord at Svinesund, and joining Sweden and Norway.

Svinesund Bridge

Crosses                                        Iddefjord at Svinesund

Locale                                          Swedish municipality of Stromstad, Norwegian municipality of Halden

Design                                         Compression arch suspended-deck bridge

Total length                                 704 m (2,310 ft)

Width                                           2 vehicular lanes in each direction

Longest span                                247 m (810 ft)

Vertical clearance total height       92 m (302 ft) above water

Clearance below deck                   55 m (180 ft) above water

Opening date                               June 13, 2005

Description of the bridge

The Svinesund Bridge is a highway bridge across the Iddefjord at Svinesund. The total cost of the project, including approach work, customs (this is an EU border) and toll plazas, and new interchanges for E6 (with the old bridge and old E6 becoming local routes) was SEK 1,400 million. The project is a joint venture of the Swedish and Norwegian road authorities, and all costs are to be financed with tolls (some writings refer to them as "road tax") collected. The new bridge is tolled in both directions and the old bridge is tolled in one direction. The total length of the bridge is 704 metres (2,310 ft) and consists of a substructure in ordinary reinforced concrete together with a steel box-girder superstructure. The main span of the bridge between abutments is approximately 247 metres (810 ft) and consists of a single ordinary reinforced concrete arch which carries two steel box-girder bridge decks, one on either side of the arch. The level of the top of the arch and the bridge deck are +91.7 metres (300.9 ft) and +61 metres (200.1 ft), respectively. Over the part of the bridge where the arch rises above the level of the bridge decking, the two bridge decks are joined by traverse beams positioned at 25.5 metres (83.7 ft) centres. The traverse beams are in turn supported by hangers to the concrete arch.

Construction

The bridge was constructed between 2003 and 2005 and was opened for traffic on June 13, 2005. Unusually for a two hinge concrete arch bridge, the arch was built using cantilever construction supported by temporary cable stays. The bridge was engineered by Bilfinger Berger, who also acted as general contractors. The two halves of the arch were cast using similar climbing formwork, with concrete provided via a cable conveyor. The construction system had an hydraulic self climbing casting mould which was anchored to the most recently completed arch segment, and segments were added at a rate of about 1 per week. Each segment used about 60 cubic meters of k70 class concrete, and there were about 50 segments per side. The arch itself is hollow, and has been provided with heating coils to keep it free from ice and snow build up as well as navigation lights and interior maintenance pathways. Once the arch was in place, the stays, temporary concrete stay towers and cable conveyors were removed, and the roadway segments added. Some were added in place, but the center roadway section under the arch was floated in on barges, as a complete section, and raised into place.