DAMAGE TO TUNNELS IN THE OCTOBER 23, 2004 CHUETSU EARTHQUAKE

Abstract

A huge number of landslides induced by the Chuetsu earthquake caused a total of 233 segments of national and prefectural routes in Higashiyama mountain area to be closed to traffic, and total 61 village areas were completely isolated. Since railway and road facilities follow closely the motions of soil, damage to these facilities must be discussed in terms of soil deformations that they experienced. This report highlights cases of some tunnels.