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Cause Investigation and Mitigation Method for Long Distance Fluidized Flow in Gently Sloped Soils during Inland Earthquake

Research Project

Project/Area Number 20H02244
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22030:Geotechnical engineering-related
Research InstitutionKyushu University

Principal Investigator

Hazarika Hemanta  九州大学, 工学研究院, 教授 (00311043)

Co-Investigator(Kenkyū-buntansha) Rohit Divyesh・Mohanbhai  九州大学, 工学研究院, 学術研究員 (30944508)
飛田 哲男  関西大学, 環境都市工学部, 教授 (00346058)
岡村 未対  愛媛大学, 理工学研究科(工学系), 教授 (50251624)
清田 隆  東京大学, 生産技術研究所, 准教授 (70431814)
兵動 太一  富山県立大学, 工学部, 講師 (80749078)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2020: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
KeywordsPalu震災 / 直下型地震 / 緩傾斜地盤 / 長距離流動 / 液状化 / 水膜現象
Outline of Research at the Start

2018年スラウェシ島直下型地震によって、低勾配地盤の液状化に伴う高速流動化地すべりが誘発され、2000人以上の方が亡くなったPalu地域を本研究のフィールドとする。まず、研究者らの現地踏査を踏まえ、既に実施してきた詳細な現地調査・原位置試験のデータ並びに測量データに基づき、地形・地質および地盤構造の定量的な評価を行う。次に、地盤特性を考慮した室内土質試験、模型実験および数値シミュレーションを通じて、内陸直下型地震における低勾配地盤のすべりの脆弱性のメカニズムを解明し、流動距離の評価方法を確立する。

Outline of Final Research Achievements

The objectives of this study are: (1) to focus on the long-distance fluidized failure of gently sloped ground in several locations of Palu city caused by the 2018 Central Sulawesi Earthquake (Mw = 7.5), Indonesia, and to determine its causes from both the geological structure and the geotechnical features, and (2) to assess the risk of similar damage caused by earthquakes of similar magnitude in similar regions of the world. Based on data analysis of field investigations, laboratory tests of collected soils, model tests and numerical simulations reproducing the geological structure, the mechanism of vulnerability of gently sloped ground during inland earthquakes was elucidated and methods for evaluating the flow distance was established.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果により、同規模の地震を想定して、我が国で類似の地質構造を有する地域のハザードマップを作成することが可能となり、その地震防災対策の策定およびレジリエントな街づくりに大きく貢献できる。また、大地震時における社会基盤施設の安定性向上について新たな指針を与えることに、本研究は豊富な社会的意義を有している。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (33 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (20 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Book (3 results) Remarks (2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] バンドン工科大学(インドネシア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] タドラコ大学/バンドン工科大学/ハサヌディン大学(インドネシア)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Tadulako University/Bandung Institute of Technology(インドネシア)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 2018年インドネシアスラウェシ島地震の被災地における現地土のせん断弾性係数と細粒分の評価2023

    • Author(s)
      寺迫太陽, 兵動太一, 掛川智仁, ハザリカへマンタ, 前田翼
    • Journal Title

      土木学会論文集

      Volume: 79

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Experimental and numerical simulation on water film formation during the 2018 Sulawesi earthquake2022

    • Author(s)
      Rohit, D., Hazarika, H., Qin, C. J., Maeda, T., Kokusho, T., and Yahiro, Y.
    • Journal Title

      Proceedings of the Institution of Civil Engineers; Forensic Engineering

      Volume: - Issue: 4 Pages: 1-15

    • DOI

      10.1680/jfoen.21.00024

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Forensic investigation of flowslides triggered by the 2018 Sulawesi earthquake2021

    • Author(s)
      Rohit, D., Hazarika, H., Maeda, T., Sumartini, W. O., Kokusho, T., Pasha, S. M. K. and Nurdin, S.
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 8 Issue: 1 Pages: 1-20

    • DOI

      10.1186/s40645-021-00452-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Experimental study on the mechanism of long-distance flow-slide in Palu, Central Sulawesi, Indonesia2020

    • Author(s)
      Hidayat, R. F., Kiyota, T., Nawir, H., Umar, M., Rosiyani and Katagiri, T.
    • Journal Title

      Bulletin of Engineering for Resilient Society Research, Institute of Industrial Science, University of Tokyo

      Volume: 53 Pages: 1-9

    • Related Report
      2020 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Presentation] 礫分含有率が配合珪砂の液状化強度特性に及ぼす影響2023

    • Author(s)
      北川陽士, 兵動太一, 寺迫太陽, 竜田尚希, ハザリカへマンタ, 前田翼
    • Organizer
      令和4年度土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2018年スラウェシ島地震の現地土の細粒分がせん断弾性係数に及ぼす影響2023

    • Author(s)
      寺迫太陽, 兵動太一, 掛川智仁, ハザリカへマンタ, 前田翼
    • Organizer
      令和4年度土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 細粒分含有率を変化させた現地土のせん断弾性係数に及ぼす影響2022

    • Author(s)
      寺迫太陽, 兵動太一, 掛川智仁, ハザリカへマンタ, 前田翼
    • Organizer
      第42回地震工学研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 礫分が配合珪砂の液状化特性に及ぼす影響2022

    • Author(s)
      北川陽士, 兵動太一, 寺迫太陽, 竜田尚希, ハザリカへマンタ, 前田翼
    • Organizer
      第 2回 JGS 北陸支部ユースネットワーク研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 等価骨格間隙比を用いた被災現地土のせん断弾性係数と細粒分評等価2022

    • Author(s)
      寺迫太陽, 兵動太一, 掛川智仁, ハザリカへマンタ, 前田翼
    • Organizer
      第 2回 JGS 北陸支部ユースネットワーク研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2018年インドネシア・スラウェシ島地震における地盤地震応答解析と簡易液状化評価2022

    • Author(s)
      堀蓮, 井上和真, 池田隆明, 清田隆
    • Organizer
      土木学会 第12回インフラ・ライフライン減災対策シンポジウム
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Presentation] Effect of artesian pressure on liquefaction-induced flow-slide: A case study of the 2018 Sulawesi Earthquake, Indonesia2022

    • Author(s)
      Kiyota, T., Shiga, M., Katagiri, T., Furuichi, H. and Navir, H.
    • Organizer
      4th International. Conference on Performance-based Design in Earthquake. Geotechnical Engineering
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 砂の非排水せん断試験結果に及ぼす間隙水温度の影響2022

    • Author(s)
      清田隆, 片桐俊彦, 志賀正崇
    • Organizer
      第57回地盤工学研究発表会
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Presentation] Effect of pressurized groundwater environment on the occurrence of long-distance flow-slide in the 2018 Sulawesi earthquake2022

    • Author(s)
      Kiyota, T., Shiga, M., Nawir, H. and Mori, K.
    • Organizer
      Proc. of 5th International Conference on Earthquake Engineering and Disaster Mitigation
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 地震による緩傾斜地の地すべりに対するSPH法の適用性2022

    • Author(s)
      上野友彰、飛田哲男、小野祐輔
    • Organizer
      2022年度土木学会関西支部年次学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 液状化した緩斜面の間隙再配分に関する遠心模型実験2021

    • Author(s)
      須山瑞紀、岡村未対
    • Organizer
      第56回地盤工学研究発表会
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Presentation] 液状化した緩斜面の局所変形による流動に関する遠心模型実験2021

    • Author(s)
      新藤依佐希,岡村未対,小野耕平
    • Organizer
      令和3年度四国支部技術研究発表会,土木学会四国支部
    • Related Report
      2021 Annual Research Report
  • [Presentation] Forensic evaluation of long-distance flow in gently sloped ground during the 2018 Sulawesi Earthquake Indonesia2021

    • Author(s)
      Hazarika, H., Rohit, D., Kiyota, T., Okamura, M., Pasha, S.M.K. and Nurdin, S.
    • Organizer
      7th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics (7th ICRAGEE)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] One-dimensional soil column simulation on water film formation during earthquake2021

    • Author(s)
      Rohit. D., Hazarika, H., Qin, C., Maeda, T., Kokusho, T. and Yahiro, Y.
    • Organizer
      1st International Symposium on Construction Resources for Environmentally Sustainable Technologies (CREST 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental study on earthquake-induced long-distance flow-slide in torsional shear test using water inflow concept2021

    • Author(s)
      Hydayat, R. F., Kiyota, T. and Umar, M.
    • Organizer
      1st International Symposium on Construction Resources for Environmentally Sustainable Technologies (CREST 2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 緩斜面の遅れ流動破壊現象に対する数値解析的検討2021

    • Author(s)
      大西宏実、飛田哲男
    • Organizer
      第56回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 液状化した緩斜面の局所変形による流動に関する遠心模型実験2021

    • Author(s)
      新藤依佐希,岡村未対,小野耕平
    • Organizer
      令和2年度土木学会四国支部技術研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Earthquake Induced Fluidized Flow in Gently Sloped Ground - Two forensic Investigations2020

    • Author(s)
      Hemanta Hazarika
    • Organizer
      International Webinar on Recent Advances in Geotechnical Engineering Research and Practice (RAGeo-RP)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 2018年スラウェシ島地震による長距離地盤流動の発生メカニズムに関する中空ねじりせん断試験2020

    • Author(s)
      清田隆, Hidayat, R. F. and Nawir, H.
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Flow deformation behavior of clean sand caused by water inflow under constant shear stress2020

    • Author(s)
      Hidayat, R., Kiyota, T., Rosiyani and Katagiri, T.
    • Organizer
      第75回土木学会年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Book] Latest Developments in Geotechnical Earthquake Engineering and Soil Dynamics2021

    • Author(s)
      Hazarika, H., Rohit, D., Kiyota, T., Okamura, M., Pasha, S. M. K., and Nurdin, S.
    • Total Pages
      34
    • Publisher
      Springer Nature
    • ISBN
      9789811614682
    • Related Report
      2021 Annual Research Report
  • [Book] Advances in Sustainable Construction and Resource Management2021

    • Author(s)
      Rohit, D., Hazarika, H., Qin, C. J., Maeda, T., Kokusho, T., and Yahiro, Y.
    • Total Pages
      11
    • Publisher
      Springer Nature
    • ISBN
      9789811600777
    • Related Report
      2021 Annual Research Report
  • [Book] Proceedings of the Indian Geotechnical Conference 20192021

    • Author(s)
      Rohit, D., Pasha, S. M. K., Hazarika, H., Kokusho, T., and Nurdin, S.
    • Total Pages
      13
    • Publisher
      Springer Nature
    • ISBN
      9789813365643
    • Related Report
      2021 Annual Research Report
  • [Remarks] 防災地盤工学研究室 グローバル地盤災害環境適応学グループ

    • URL

      https://kyushu-univ-hazarika.wixsite.com/global-geo-disaster/home-1

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] 九州大学 防災地盤工学研究室 グローバル地盤災害環境適応学グループ

    • URL

      https://kyushu-univ-hazarika.wixsite.com/global-geo-disaster/

    • Related Report
      2020 Annual Research Report
  • [Funded Workshop] Towards the Thought Process of Slope Disaster Prevention in the Digital Era2022

    • Related Report
      2022 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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