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A study on mechanical behavior of buried pipe bends for improving its seismic resistance and extending the service life

Research Project

Project/Area Number 17H01495
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Rural environmental engineering/Planning
Research InstitutionKobe University

Principal Investigator

KAWABATA Toshinori  神戸大学, 農学研究科, 教授 (20335425)

Co-Investigator(Kenkyū-buntansha) 井上 一哉  神戸大学, 農学研究科, 准教授 (00362765)
有吉 充  国立研究開発法人農業・食品産業技術総合研究機構, 農村工学研究部門, 主任研究員 (10414442)
澤田 豊  神戸大学, 農学研究科, 准教授 (60631629)
毛利 栄征  茨城大学, 農学部, 教授 (90373224)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥41,990,000 (Direct Cost: ¥32,300,000、Indirect Cost: ¥9,690,000)
Fiscal Year 2019: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2018: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2017: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Keywordsパイプライン / 屈曲部 / スラスト防護工法 / 耐震性 / 長寿命化 / 液状化 / 砕石 / ジオグリッド / 模型実験 / 耐震設計 / スラスト力 / 振動実験 / 遠心力模型実験 / 数値解析
Outline of Final Research Achievements

Judging from the damage cases in the Great East Japan Earthquake or past large earthquakes, bends of buried pipelines tend to be weak points during earthquakes. Generally, heavy concrete blocks have been used as a thrust restraint, whereas a more lightweight thrust restraint is required to improve the seismic resistance of pipeline. In this study, various type model experiments have been conducted in order to reveal mechanical behavior of buried bends against lateral movement and establish the new method in which gravel and geogrid are used. As a result, the new thrust restraint has been verified to be effective in liquefied ground and the estimation method for the lateral resistance by the new method has been proposed.

Academic Significance and Societal Importance of the Research Achievements

営農に不可欠な灌漑用水を,ダムなどの貯水施設から末端圃場まで適確に運ぶために,国内には45,000kmにおよぶ幹線水路網がある.しかしながら,近年の巨大地震や水路施設の老朽化により,その耐震化や長寿命化が急務となっている.また,東日本大震災や過去の被災例から判断して,パイプラインの弱点は屈曲部近傍に集中することは明白である.
このような背景の中,当研究課題では,農業用パイプライン屈曲部の力学挙動を解明するとともに耐震性の高い屈曲部構造を考案およびその有効性を検証したことから,本研究成果は,将来における我が国の農業農村整備事業に貢献するものと考えられる.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (17 results)

All 2020 2019 2018 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (12 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Journal Article] Shaking table tests for buried pipe bends with thrust restraints using geogrid and gravel in liquefied ground2019

    • Author(s)
      Yoko Ohta, Yutaka Sawada, Mina Kawamura, Kohei Ono and Toshinori Kawabata
    • Journal Title

      Proceedings of the 29th International Ocean and Polar Engineering Conference

      Volume: - Pages: 2373-2377

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of angle and interface friction of buried pipe bend on lateral resistance force2019

    • Author(s)
      Mina Kawamura, Yutaka Sawada Yoko Ohta, Kohei Ono and Toshinori Kawabata
    • Journal Title

      Proceedings of the 29th International Ocean and Polar Engineering Conference

      Volume: - Pages: 2378-2382

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Model Experiments on Influence of the Bending Angles on Lateral Resistance Acting on Buried Pipe Bends2018

    • Author(s)
      Yoko Ohta, Yutaka Sawada, Kohei Ono, Hoe I. Ling, and Toshinori Kawabata
    • Journal Title

      Proceedings of the 28th International Society of Ocean and Polar Engineering Conference

      Volume: - Pages: 589-593

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] ジオグリッドを用いた埋設管スラスト防護工法の形状寸法が付加抵抗力に与える影響について2018

    • Author(s)
      太田遥子,澤田豊,小野耕平,河村未奈,河端俊典
    • Journal Title

      ジオシンセティックス論文集

      Volume: 33 Pages: 55-60

    • NAID

      130007644809

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 砕石による圧力管路屈曲部のスラスト対策に関する遠心振動実験2020

    • Author(s)
      太田遥子,喜多田恵,澤田豊,有吉充,泉明良,井上一哉,毛利栄征,河端俊典
    • Organizer
      2020年度農業農村工学会大会講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 圧力管路屈曲部スラスト防護工法の水平抵抗力の推定2020

    • Author(s)
      喜多田恵,太田遥子,澤田豊,河端俊典
    • Organizer
      2020年度農業農村工学会大会講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effects of Angle and Interface Friction of Buried Pipe Bend on Lateral Resistance Force2019

    • Author(s)
      Mina Kawamura, Yutaka Sawada, Yoko Ohta, Kohei Ono and Toshinori Kawabata
    • Organizer
      The 29th International Ocean and Polar Engineering Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Shaking table tests for buried pipe bends with thrust restraints using geogrid and gravel in liquefied ground2019

    • Author(s)
      Yoko Ohta, Yutaka Sawada, Mina Kawamura, Kohei Ono and Toshinori Kawabata
    • Organizer
      The 29th International Ocean and Polar Engineering Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ジオグリッドと砕石を用いた圧力管路屈曲部スラスト対策工法に関する1G場小型振動実験①(耐震性の検討)2019

    • Author(s)
      喜多田恵,太田遥子,河村未奈,澤田豊,河端俊典
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ジオグリッドと砕石を用いた圧力管路屈曲部スラスト対策工法に関する1G場小型振動実験②(液状化地盤での有効性の検討)2019

    • Author(s)
      太田遥子,河村未奈,喜多田恵,澤田豊,河端俊典
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 河村未奈,太田遥子,澤田豊,河端俊典2019

    • Author(s)
      屈曲角度および表面摩擦が異なる曲管の水平載荷実験
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 埋設管の屈曲角度が水平抵抗力に与える影響に関する3次元個別要素法解析2019

    • Author(s)
      廣川慎,寺田健司,澤田豊,河端俊典
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 軽量スラスト防護工法の形状寸法効果に関する一考察2018

    • Author(s)
      太田遥子,河村未奈,澤田豊,河端俊典
    • Organizer
      農業農村工学会京都支部第75回研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 圧力管路屈曲部の角度が水平スラスト抵抗力に与える影響2018

    • Author(s)
      河村未奈,太田遥子,澤田豊,河端俊典
    • Organizer
      農業農村工学会京都支部第75回研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Model Experiments on Influence of the Bending Angles on Lateral Resistance Acting on Buried Pipe Bends2018

    • Author(s)
      Yoko Ohta, Yutaka Sawada, Kohei Ono, Hoe I. Ling, and Toshinori Kawabata
    • Organizer
      The 28th International Ocean and Polar Engineering Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ジオグリッドを用いた埋設管屈曲部のスラスト防護工法に関する個別要素法シミュレーション2018

    • Author(s)
      寺田健司,廣川慎,澤田豊,河端俊典
    • Organizer
      平成30年度農業農村工学会講演会
    • Related Report
      2017 Annual Research Report
  • [Remarks] 神戸大学大学院農学研究科土地環境学研究室

    • URL

      http://www.research.kobe-u.ac.jp/ans-soilenv/

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report 2017 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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