EXPERIMENTAL STUDY OF ASEISMIC RETROFITTING METHOD FOR ABUTMENTS BY LINKING ABUTMENTS TO SOIL-MIXED COLUMN-WALLS

DOI Web Site 4 Citations 2 References
  • IKEMOTO Hirofumi
    東日本旅客鉄道株式会社 JR東日本研究開発センター フロンティアサービス研究所
  • TAKASAKI Hideaki
    東日本旅客鉄道株式会社 JR東日本研究開発センター フロンティアサービス研究所
  • FUJIWARA Torajiro
    東日本旅客鉄道株式会社 構造技術センター
  • SANAGAWA Taisuke
    公益財団法人鉄道総合技術研究所 構造物技術研究部
  • NISHIOKA Hidetoshi
    公益財団法人鉄道総合技術研究所 構造物技術研究部

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Other Title
  • 柱列状改良体の連結による橋台耐震補強工法に関する実験的検討

Abstract

 In this study, methods of aseismic retrofitting were developed for abutments in which soil-mixed column walls are linked to abutments along the sides of tracks, utilizing ground improvement techniques. A shacking table test in gravity field was conducted on a model scale of 1/15 to verify the effect of the proposed method. As a result of the shaking table test, the backfill, which was located between the abutment and the soil-mixed column walls, behaved together with the abutment and the soil-mixed column walls. The abutment collapsed in sliding mode and a failure plane was formation that on the backside of the soilmixed column walls. Thus, it was confirmed by experiment the proposed method improves earthquake resistance since the soil-mixed column walls resisted external force by the subgrade reaction and shear resistance at the bottom and the sides of the soil-mixed column walls during shaking.

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