LOCATION

Sundsvall, Sverige

CLIENT

Trafikverket

BUILDING PERIOD

2012-2014

PARTNERS

JV PBM

The Sundsvall Bridge crosses the Sundsvall Fjord with a total length of 1,420 m as part of the new eastern highway in Sweden. The contract was won in a European competition, by PBM Joint Venture with ISC Consulting Engineers A/S as designers for the bridge superstructure.

The key part of the connection which has a total length of 2.1 km including approach spans, elevated concrete abutments and the 1.42 km long steel bridge. The bridge is designed as a continuous girder bridge with 11spans, a center span of 170 m and side spans of 88 m.

The bridge concept related to geometry is quite outstanding. The steel superstructure is curved in the horizontal plane as well as in the vertical plane, and due to the horizontal curve, one side slopes on the road surface and the bridge width varies from 26.2 m in the center span up to 36.9 m at the southern abutment and 38.8 m at the northern abutment.

The bridge superstructure is designed as a closed box girder bridge with orthotropic bridge deck, wing-shaped with tapered under flanges towards the edges. The height of the box girder is 6.5 m in the center span reduced to app. 3.5 m at the abutments. The box girder is provided with lattice diaphragms in distance app. 4 m and further with longitudinal bulkheads designed as lattice girders located app. at the third points of the cross-sections. None of the 400 bulkheads have equal geometry which requires thorough accuracy in the construction phase of the steel structure. The bridge has a free height at the center span of 33 m in the navigation channel of 90 m. The foundation level is around 30 m below the water surface as a thick layer of mud, and soft soil covers the seabed.

It is anticipated that mass dampers have to be provided in all spans. The box girder spans are supported via a V-shaped support to the concrete pillars. The V-shaped supports consists of tubular members with a maximum diameter of 2 m.

The fabrication of the steel superstructure comprising approx. 22,000 ton is carried out by Max Bögl in Munich in Germany and transported by barge to Stettin, Poland. The bridge elements will be assembled to full bridge spans of app. 2,000 ton, and then the 88 -170 m long bridge sections will be transported to Sundsvall. The work commenced in 2011, and the bridge was taken into service in December 2014. The total cost is approx. 1.5 bill. SKr.

LOCATION

Sundsvall, Sverige

CLIENT

Trafikverket

BUILDING PERIOD

2012-2014

PARTNERS

JV PBM


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