Construction results report of the diagonal web girder for the purpose of the quantity of ballast digging reduction.

[VI-509] Construction results report of the diagonal web girder for the purpose of the quantity of ballast digging reduction.

〇takato ootsuka¹, Tatsuya Yamamoto¹, Mutsumi Yoneyama¹ (1.EastJapanRailwayCompany)

Keywords:Railway construction, Construction girger, Ballast drilling

JR田沢湖線羽後長野・鑓見内間に位置する「斉内川橋りょう」では,斉内川の河川改修に伴い,既設桁54.6mを新設桁70.4mへ架替えを行う.新設桁の架替え当夜の作業を減らすため,架替えに先立ち,既設橋台背面側に工事桁を架設する.本稿ではその工事桁の架設計画と施工実績について報告する.

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