Details
Beam Bridge
Executive plan
Location
Sangro Viaduct – S.S. No.652 “Fondovalle Sangro” (CH)
Principal
TECNIS S.p.A
Contracting company
TECNIS S.p.A.
Team
- COGIP S.r.l
- Eng. PAVESI & C. S.p.A.
Matildi+Partners srl
Activities
Executive plan (scaffolding)
Time Period
2007-2011
Extent and spans
346 m | 58+92+92+60+44
Structural Layout
Structural Layout
Detailed executive plan of the metal deck of the Sangro viaduct, inside the 2nd lot – 2nd Section – 1st Stretch of S.S. 652 “Fondovalle Sangro”.
The new deck is a continuous truss in a composite steel-concrete system with five 58+92+60+42 m spans. The first section of the structure is curved with a radius of curvature of 550 m and then proceeds through a straight Euler spiral.
The concrete slab accommodates the road platform and two pavements, with an overall width of 13.50 m; it is framed on the main girders, which are 9 m apart, and on the intermediate pin beam. The slab, with a total thickness of 27 cm, is cast in situ on self-supporting concrete predalles.
Deck and Assembly
Deck and Assembly
The beams vary in height from a minimum of 2.80 m at the span to a maximum of 5.30 m at the pier and are inclined at an angle of approximately 20° to the normal axis of the lower platform.
They are connected by lattice-type diaphragms positioned at a constant centre distance of 5.5 m and by a lower bracing in the form of a St. Andrew’s cross, which is required to ensure torsion-rigid caisson behaviour.
Assembly of the deck is carried out by lifting the individual beams from below with the aid of a crane truck, after assembly of the segments on the ground and subsequent forward advancement.
