ABSTRACT
The Ceneri Base Tunnel (CBT) is a railway tunnel representing the southern continuation of the Gotthard Base Tunnel within the Swiss AlpTransit project. The tunnel is characterized by two single-track bores for a length of 15.4 km and will be excavated entirely in the crystalline bedrock of the Southern Alps. For the most part the tunnel will be excavated in a material with good mechanical characteristics, principally constituted by gneiss, with a maximal overburden of 800 m. Nevertheless, the tunnel will cross local fault zones, the largest of which is named Linea Val Colla (LVC).
