Aglio viaduct

Part of lot 13, the labour and materials used in this infrastructure meet the very highest technical and quality standards.
The Aglio Viaduct is the most imposing open works on the by-pass: 600 metres of steel and self-compacting concrete, for which construction a number of different project designs were evaluated since 2003.
Albeit different, the project designs shared a common theme: the absence of structural elements on the road's surface, which allowed the new work to be integrated within the context of the surrounding hillside environment with reduced environmental impact, thanks to its essential and clean structural lines.
Autostrade per l'Italia opted for a solution that envisaged the use of prestressed concrete construction technology. Known as "cantilever construction", this consists of a series of deck segments, which are constructed starting from the pier and meet with the segments constructed on the next pier in the centre of the span. Although developed several years ago, this construction technology is still popular today for large-span bridges as it both economical and provides maximum workplace safety guarantees as well as allowing the construction of a structure that is statically very effective.
The architecture of the bridge is also characterised by the particular shape of the pillars, which reflects a static construction need, as well as the search for a high-level architectural design, in line with the Autostrade per l'Italia's desire to create works that are as sustainable as possible in terms of both the environment and the surrounding local area. The bridge was constructed using roadwork equipment boasting the highest levels of excellence, supplied by leading international companies from a technological point of view, and self-compacting concrete which, as well as guaranteeing durability, ensures high-resistance and impermeability on account of its extremely compact, non-porous nature. The mandatory checks performed by packaging technicians (under penalty of rendering the concrete unusable) and the greater cost thereof, are offset by the ease of implementation and increased workplace safety.