[Suspension + Cable-stayed Bridge]
3rd Bosphorus Bridge (Yavuz Sultan Selim Bridge, (Turkish: Yavuz Sultan Selim Köprüsü)) Construction
Bosphorus, Istanbul, Turkey
The 3rd Bosphorus Bridge has a unique construction that is regarded as the bridge of the firsts. It is going to be the widest suspension bridge in the world with a width of 59 meters and the longest spanning one that has 8 lanes of motorway and 2 lanes of railway on it, with a main span of 1408 meters. Another first of the bridge is that it is the suspension bridge with the highest bridge pylons of the world, with a height of 322 meters. A hybrid system that consists of two different construction techniques which are cable-stayed and suspension bridge is used for the 3rd Bosphorus Bridge. The construction of the bridge includes three main parts. Side spans including anchorage and approach block, main span and pylons. Anchorage and approach blocks are built up by conventional methods. Pylons, triangular in cross section and with 1.50 m wall thickness, are raised up by slipforming up to elevation +208.00 and then continue with climbing form up to elevation +322.00. A special formwork was produced by Bygging International, the Swiss company, and used in the construction of pylons.
Project data :
Location: Istanbul, Turkey
Third and largest Bosphorus bridge with a unique pylon cross-section.
Suspension bridge supported by two A-shaped pylons which are amongst the highest in the world.
With the highest concrete bridge piers worldwide, it connects the European and Asian continents.
Construction: suspension bridge
Pylon height: 322 m
Span: 1.408 m
Width: 59 m (with 8 vehicle lanes and 2 railway lines)
Requirements :
Unique pylon cross-section: triangular-shaped basic structure with broken corners, forward and reversed-inclined external walls, tapered cross-section
High number of steel mounting parts with varying dimensions and positioning
High requirements regarding surface quality and dimensional accuracy
Tight schedule
Customer :
General Contractor
ICA – Consortium IC Içtas / Astaldi
