Customer: Public Enterprise ROADS OF SERBIA
Construction period: 03.2008 – 2011
Location: between the cities of Novi Sad and Belgrad near the city of Beska
Country: Serbia
The construction of a new bridge is necessary between the cities of Novi Sad and Belgrad near the town of Beska as part of the full, 4-lane development of the E75 motorway (part of the Pan-European Corridor 10). It will be constructed as a so-called “twin bridge”, i.e. a bridge next to the existing bridge that currently handles the traffic in both directions. The new and old bridge will have the same look.
The Design-Build Contract includes planning and construction of this bridge. With 2,213 m length it will be the longest bridge construction in all of Serbia. The bridge will across the Danube will spans of 60 m + 105 m + 210 m + 105m + 60 m. Three bridge piers will have to be constructed in the river. This poses considerable challenges for the planner (Leonhardt Andra & Partner) and the construction specialists of ALPINE. The bridge will connect to the foreshore bridge on the right-hand side of the Danube with spans of 4 x 45 m. The foreshore bridge on the left-hand side of the Danube will cross the Danube’s flood area with a length of 1,493 m.
First, the bridge piers will be constructed and anchored with deep poles (diameter 120 cm, length 35 m). Next, the left foreshore bridge will be concreted in sections of 45 m, using a formwork carriage fixed to the piers. The construction will progress in single-cell, pre-stressed box girders. This construction methods enables ALPINE to continue with the construction independent of the many months of flood in the wetland. The spans of the right-hand side foreshore bridge will be constructed conventionally in sections with scaffolding and shells. The bridge will have a height above ground of up to 40 m. The “cantilever method of construction” will be used to build the wide spans of the bridge crossing the river. This girders will be concreted and pre-stressed in short, balanced 5-m-sections on both sides of the piers at the same time (balance beams). Once the centre of the span is reached, the framework carriage will be moved to the next pier and the procedure repeats until the overhanging girders join in the middle of a span.
Picture gallery: Bridge across the Danube at the town of Beska
