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BRIENZ DRAINAGE TUNNEL (GR)

The job order, awarded to the ARGE Piz Linard consortium consisting of Pizzarotti SA and Matteo Muttoni Costruzioni SA, concerns the excavation of a tunnel with a length of 1,926 m, cross-section of 4.14 m x 4.81 m, and longitudinal gradient between 2 and 12%.

The excavation is protected by anchors, reinforcement meshes, shotcrete with and without steel fibres and partly with steel ribs. The shotcrete vault has no waterproofing. From the 20 niches and the tunnel, various drainage holes are provided.

Client Municipality of Albula/Alvra - Canton of Graubünden