The current Grenland Bridge is built for two-lane traffic with a total driving width of 10 meters, i.e. two carriageways of 3,5 meters and two shoulders of 1,5 meters. In connection with the extension of the current E18 to a four-lane highway class H9, a new bridge will be built since the existing bridge doesn’t have the capacity for additional lanes.
The New Grenland bridge is a single pylon cable-stayed bridge with a main span of 330m long. Total length of the bridge is 604m (from A1 to A8). The pylon is H-shaped with a top elevation of +166 m. The deck is made of a steel box girder from A1 to P3 and of a steel composite box girder from P3 to A8.
Two parts of the deck are launched (from A1 to P2 and from A8 to P3), these parts of the deck are reinforced by two central beams allowing the launching. The main span is erected by 21 m long steel segments in free cantilever lifted by a derrick travelling on the completed steel structures.
The Design Joint Venture (DJV) composed by Systra SA, Systra The Design Joint Venture (DJV) composed by Systra SA, Systra IBT Dubai and SKC is carrying out the detailed design for the new bridge. This major bridge is part of the design & build contract won by Eiffage Génie Civil for the section of the E18 project, four-lane motorway, which will connect the towns of Langangen and Rugtvedt (Norway).
SYSTRA Korea is mainly involved on the pylon and piers design, providing structural analysis and rebar detailing in 3D model – Tekla.