Viadotto Sfalassà

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Coordinates: 38 ° 16 ′ 16 ″  N , 15 ° 48 ′ 11 ″  E

Viadotto Sfalassà
Viadotto Sfalassà
use Highway bridge
Convicted A2 Autostrada A2
place Bagnara Calabra
construction Truss bridge
Longest span 110 + 156 + 110 m
Pillar spacing 376 m
height 250 m
start of building 1968
completion 1972
planner Silvano Zorzi et al. a.
location
Viadotto Sfalassà (Italy)
Viadotto Sfalassà

The Viadotto Sfalassà (also Ponte di Bagnara ) is a bridge on the Italian Autostrada A2 . It stands in the mountains above the town of Bagnara Calabra in the metropolitan city of Reggio Calabria , where it crosses the Fiumara Sfalassà gorge .

The bridge was built between 1968 and 1972 on behalf of ANAS according to plans by Silvano Zorzi , Sabatino Procaccia and Luciano Lonardo. It was the third tallest bridge in the world when it opened and is still the largest truss bridge in the world. When the A3 was renewed between 2009 and 2015, it was overhauled and adapted to the new, straightened lines with tunnels at both ends of the bridge. For this purpose, the bridge parts on the slopes on both sides of the main opening were completely renewed.

Its main opening consists of a steel deck that is supported by two steel struts . The main opening is 376 m wide and is divided into spans of 110 + 156 + 110 m by the struts . The road is about 250 m above the valley floor. The carriageway girder is a box girder that is stiffened inside by St. Andrew's cross struts and supports the protruding orthotropic plate of the carriageway girder with lateral cantilever arms .

The pillars on both sides of the main opening and the deck girders they support are made of reinforced concrete or prestressed concrete .

During the construction of the bridge, the lateral concrete pillars and roadway girders were first created. Then the steel struts next to the main pillars were made in a vertical position on their bearings until their ends finally protruded over the pillars. Provisional lattice girders were attached to these ends , the other end of which lay on the roadway girders . After the main pillars were guyed to the slope, the struts were lowered to their final inclined position. The lattice girders were pulled into the horizontal position and now served as auxiliary scaffolding for the production of the road girder. After the deck girders were firmly installed between the pillars and the struts, the remaining 156 m opening could be closed in the cantilever .

Web links

Commons : Viadotto Sfalassà  - collection of images, videos and audio files

Individual evidence

  1. ^ Francesco Romeo: Sfalassà: il gigante della A3. Il Ponte di Bagnara è la struttura ad arco portale più alta del mondo. On ilMetropolitano.it
  2. ↑ Francesco Romeo: A3 Salerno-Reggio Calabria: Sfalassà si rinnova a prova di sisma article of June 9, 2012 in Il Quotidiano della Calabria, on le Strade dell'Informazione.it
  3. ↑ a b Leonardo Fernández Troyano: Bridge Engineering. A global perspective. Colegio de Ingenieros de Caminos, Canales y Puentes, Thomas Telford 2003, ISBN 0-7277-3215-3 , p. 458
View of Bagnara and the bridge