ABSTRACT
The Chuo Alps Tunnel on the Chuo Shinkansen (high speed rail) between Shinagawa and Nagoya, is a 23.3 km long double-track mountain tunnel that runs through the Kiso Mountains (Chuo Alps). The Yamaguchi construction section locates at the end of the tunnel, straddling Nagano and Gifu prefectures, and has a length of approximately 4.7 km. The geology alongside the route is mainly of Mesozoic Cretaceous granite porphyry, and there are several active faults. Among them, approximately 1.5 km of the tunnel intersects the Atera Fault, one of the major active faults in Japan. In this paper describes the construction plan and results of the construction in the fault zone, which is considered to have been formed by the activity of the Atera Fault in the Yamaguchi section of the Chuo Alps Tunnel, and the quantitative evaluation and results of the ground level of the tunnel.
