HISTORY OF THE SEIKAN TUNNEL DISASTER PREVENTION SYSTEM AND DEVELOPMENT POLICY FOR THE NEXT-GENERARION SYSTEM

Abstract

 The Seikan Tunnel Disaster Prevention System consists of three monitoring systems: groundwater inflow, tunnel lining strain, and earthquakes. It has been continuously operating since the opening of the Seikan Tunnel in 1988. Initially installed for the Tsugaru Kaikyo Line, the system has undergone three updates, including after the opening of the Hokkaido Shinkansen in 2016. The knowledge gained from this system has been utilized in determining the specifications for the Shinkansen’s early earthquake warning (EEW) system. Based on past experience, a new system is currently being developed that significantly updates the sensor and network specifications since the tunnel’s opening. Additionally, future plans include implementing functions that not only provide regular monitoring but also contribute to the safety of trains during abnormal conditions.