Upgrading of motorway A1 Milano - Napoli on lots 6 and 7 along section La Quercia-Badia Nuova between Sasso Marconi and Barberino di Mugello.

The project involves construction of new section of 7.5 km motorway , with 2 twin-tube tunnels named "Sparvo" and "Val di Sambro" (4.925 + 5874 linear metres), and 2 viaducts "Molina di Sotto" and "Sparvo" (1.051+ 985 linear metres ). The work also includes 6 security tunnels, 2 carriageable bypass between the twin tubes, 1200 m of embankment and minor road works.

The Val di Sambro tunnel has been excavated using traditional methods. The Sparvo tunnel has been performed by artificial excavation using a TBM-EPB Shield , Martina, specifically designed for this project and equipped with anti-explosive devices.

The " Sparvo" tunnel drilling diameter, 15615 mm , represent a world record in mechanized tunnelling. 

  Area            Employer           Year           Sector 

Italy- Europe                                Autostrade per l´Italia S.p.A                                   2007- 2015                             Roads and Highways