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Mechanical Properties of fiber-reinforced granular media based on the multi-scale modeling

Research Project

Project/Area Number 16K06493
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geotechnical engineering
Research InstitutionHachinohe Institute of Technology

Principal Investigator

Kaneko Kenji  八戸工業大学, 大学院工学研究科, 教授 (30333834)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsファイバー混合補強土 / 粒状体 / 強度変形特性 / 数値解析 / 短繊維(ファイバー) / 補強土 / 補強メカニズム / 土質力学 / 粒状体力学 / 短繊維混合補強土
Outline of Final Research Achievements

We clarified the appearance mechanism of optimum mixture ratio which was reinforced soil by mixing short fiber with the tri-axial compression tests and the numerical experiments using four types silica sand. It was clarified that when mixing too much, become too easily slip at boundary between short fiber and soil particles, and that negative effect outweighs positive effect so optimum mixture ratio will be appears. It is very important that there is an optimal solution for the mixture ratio of short fiber mixing reinforced soil. And it can contribute to the elucidation of the improvement mechanism of the mechanical properties of the granular material by mixing of short fibers.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果として,ファイバー混合補強土において強度に対してファイバーの混合率に最適値(最適混合率)が存在することを初めて明らかにした.また,最適混合率が,土粒子サイズに依存する事を発見し,土粒子のサイズが小さい程,最適混合率が大きくなることを実験的に示した.さらに,数値解析によりその補強メカニズムを明らかにした.
これらの成果により,ファイバー混合補強土が普及することで,粘り強い構造物の構築に貢献できる。また,竹チップ・間伐材チップやヤシ繊維などの天然材料を利用した地盤補強技術の普及による環境配慮型インフラ構築への貢献が期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (7 results)

All 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (4 results)

  • [Journal Article] Consideration of reinforcement mechanism in the short fiber mixing granular materials by granular element simulations2017

    • Author(s)
      K. Mori, K. Kaneko and Y. Hashizume
    • Journal Title

      Powders and Grains 2017, 8th International Conference on Micromechanics on Granular Media

      Volume: - Pages: 12020-12020

    • DOI

      10.1051/epjconf/201714012020

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 供試体作製条件に着目した短繊維混合砂の強度変形特性に与える短繊維混合率の影響について2017

    • Author(s)
      盛 健太郎・橋詰 豊・金子 賢治
    • Journal Title

      ジオシンセティックス論文集

      Volume: 32 Pages: 197-202

    • NAID

      130007555591

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Consideration of reinforcement mechanism in the short fiber mixing granular materials by granular element simulations2017

    • Author(s)
      K. Mori, K. Kaneko and Y. Hashizume
    • Journal Title

      Poders and Grains 2017

      Volume: 2017

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] ファイバー混合粒状材料の強度変形特性と混合率の関係の整理2018

    • Author(s)
      盛健太郎,小笠原亮介,橋詰豊,金子賢治
    • Organizer
      第73回土木学会年次学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 締固め度一定条件における短繊維混合粒状材料の繊維混合率と強度特性の関係2017

    • Author(s)
      盛健太郎,橋詰豊,金子賢治
    • Organizer
      第72回土木学会年次学術講演会
    • Place of Presentation
      福岡市・九州大学
    • Year and Date
      2017-09-11
    • Related Report
      2016 Research-status Report
  • [Presentation] 短繊維混合粒状材料における短繊維混合率と締固め特性について2017

    • Author(s)
      盛健太郎,橋詰豊,金子賢治
    • Organizer
      平成28年度土木学会東北支部技術研究発表会
    • Place of Presentation
      仙台市・東北工業大学
    • Year and Date
      2017-03-04
    • Related Report
      2016 Research-status Report
  • [Presentation] 締固め度一定条件における短繊維混合粒状材料の繊維混合率と強度特性の関係2017

    • Author(s)
      盛 健太郎・橋詰 豊・金子 賢治
    • Organizer
      土木学会第72回年次学術講演会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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