ABSTRACT
The Kerenzerbergtunnel (L = 5.7 km) is part of the highway N03 connecting Zürich with the eastern part of Switzerland. After 37 years of operation it needs a general refurbishment and an upgrading to fulfill with the new safety regulations. The main adjustments include the realization of a new service tunnel, a modification of the ventilation system and the full refurbishment of the road tunnel. The service tunnel has a length of 5.5 km and will be excavated with a double shield TBM. The tunnel design follows an innovative approach: the tunnel acts simultaneously as a safety and ventilation gallery (double function). The main structural elements are realized by precast concrete elements in order to increase the degree of mechanization and reduce the construction time. The TBM supply is carried out by innovative self-driving vehicles, which don’t need any mechanical guidance thanks to their modern control sensors.
