診断・補修・補強 (4)

[I-165] Repairing method by using UFC for upper surface of buckle plate on steel railway bridge

*福本 守¹、橋本 雅行²、三田村 浩³、橋本 国太郎⁴ (1. 西日本旅客鉄道株式会社、2. 一般社団法人日本建設機械施工協会　施工技術総合研究所、3. 一般財団法人災害科学研究所　J-ティフコム研究会、4. 神戸大学)

Keywords:buckle plate, steel railway bridge, upper surface repairing, UFC, crack, corrosion

On the buckle plate type steel railway bridge, some situations exist where the waterproof layer and protective concrete deteriorate with age, leading to corrosion on the upper surface of the buckle plate and corrosion-fatigue crack. Against these problems, the authors have developed the new repairing method by increasing the thickness of protective concrete by casting ultra-high-strength fiber reinforced concrete (UFC) on the upper surface of the existing protective concrete, suppressing the corrosion of the buckle plate and reducing the stress of the buckle plate. In this study, in order to verify the effect of this repairing method, the loading test using a full-scale girder was performed.