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  Innovations and Challenges operating the World’s Largest TBM

  The Sparvo Twin Tunnels are part of the “Variante di Valico” project, a new 65km highway link between Bologna e Florence, designed to renew the existing A1 route, the most important one in Italy. The renovation project is divided into 13 lots and, because of its complexity, the Sparvo section overall represents the main work. It is composed by 2.5km long twin tunnels, excavated inside a complex geological context, characterized by the presence of gas and a series of landslides, some of which are active and regionally important, such as the so-called “Grande Frana di Sparvo” (“Great Landslide of Sparvo”).

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