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土石流が頻発した雲仙普賢岳の火山災害では, 交通を確保するために緊急連絡橋の建設, 橋梁の土石流対策, 防災工事を行うために交通を確保しながら, 橋梁の架け替えが行われた. また, 導流堤や拡幅された河川を横断するスパンの橋梁が架設されつつある. 本報告では,雲仙普賢岳の火山災害における橋梁の応急・緊急および本復旧対策を述べる.The volcanic disaster of Mt. Fugen are prolonged and enlarged more than four years. Disaster prevention officials of roads and railway recognized the danger of the mountain erupting and considered counterplans to protect their facilities. They also considered emergency and parmanent restoration plans after debris flows attacked their facilities. In this paper, emergency counterplan, damage and both temporary and permanent restoration plans of bridges of roads and railway to volcanic disaster of Mt. Fugen are reported and discussed

DAMAGE AND RECONSTRUCTION OF BRIDGES DURING VOLCANIC DISASTERS OF MT. FUGEN IN UNZEN