Restoration Work for existing tunnel in Kumamoto

The Tawarayama Tunnel Route, which suffered significant damage during the Kumamoto Earthquake, became impassable. Disaster recovery work was carried out as a national project on the Kumamoto-Takamori Line, specifically between Komori in Nishihara Village and Kawai in Minami-Aso Village (approximately 10 km). This project aims to ensure the smooth flow of logistics in the Aso region, promote tourism, and guarantee safe passage during the winter by expediting the restoration of the damaged sections of the Tawarayama Tunnel and the landslide areas at the tunnel entrances.

We were responsible for the mortar spraying work on the slope protection of the tunnel entrance after cutting and shaping the landslide area. We aimed to complete the work by the end of the year and successfully reopened the route on December 24, 2016. After the reopening, we continued with the construction of the frame work at the tunnel entrance (approximately 10,300 m) and completed the project successfully.

(Location: Kumamoto)