石川県白山麓の大規模斜面災害現場における落石シミュレーション手法によるリスク予測

抄録

A large rockfall disaster on Hakusan Shirakawa-go White Road occurred on a forest road in Ishikawa Prefecture on December 14, 2018. This is the only important road connecting Ishikawa and Gifu prefecture. Therefore, it was out of service for four and a half years. Fortunately, it was fully opened at May 20 2023. Firstly, this disaster is explained in detail. Subsequently, the rockfall simulation method is introduced that had been developed by the authors. The method is applied to this real slope. The results of the risk evaluation of rockfalls on a road have been concretely shown. A rock shed is located on the road as a protection structure against rockfalls from the steep mountain slope. Finally, the current extent of the risk for rockfalls on the road considering the rock shed been shown.