Experimental study on seismic response of foundation composed of micropiles and soilbags

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  • Doi Tatsuya
    （公財）鉄道総合技術研究所 鉄道地震工学研究センター
  • Oshida Naoyuki
    （公財）鉄道総合技術研究所 鉄道地震工学研究センター
  • Yamada Seiji
    （公財）鉄道総合技術研究所 鉄道地震工学研究センター
  • Murono Yoshitaka
    （公財）鉄道総合技術研究所 鉄道地震工学研究センター
  • Cho Ho
    名古屋工業大学 都市社会工学科

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Other Title
  • 小径杭併用土のう基礎の地震時応答特性に関する実験的研究
  • ショウケイ クイ ヘイヨウ ドノウ キソ ノ ジシンジ オウトウ トクセイ ニ カンスル ジッケンテキ ケンキュウ

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Abstract

<p>The authors propose foundation composed of micropiles and soilbags as a new foundation type. The foundation is characterized by laying soilbags on the pile head and constructing structures on the soilbags. The expected effects are omitting junction structures of piles and footing, reducing diameter of piles, and reducing response acceleration of structures. In this study, shaking table tests and their reproduction analysis targeting piers on the supporting ground, on the micropiles, and on the proposed foundation were conducted. The tests and analysis results showed that bearing capacity of proposed foundation was almost equivalent to that of supporting ground, and that the bending moments of micropiles were suppressed by laying soilbags on the micropiles.</p>

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