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Development of a Regional Assessment Method for Seismic Vulnerability of Slopes Using a Coupled Sliding Rigid-Block Model

Research Project

Project/Area Number 21K04235
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionTottori University

Principal Investigator

Ono Yusuke  鳥取大学, 工学研究科, 教授 (00346082)

Co-Investigator(Kenkyū-buntansha) 河野 勝宣  鳥取大学, 工学研究科, 准教授 (60640901)
和田 孝志  鳥取大学, 工学研究科, 准教授 (60832996)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords地震 / 地すべり / 斜面崩壊 / ハザード / 地震時斜面崩壊 / 崩壊土 / ハザードマッピング / 剛体すべりブロック / 剛体ブロック / すべり剛体ブロック / 流動土砂 / 到達範囲
Outline of Research at the Start

本研究では,従来手法である独立したすべり剛体ブロックモデルを用いた地震時斜面崩壊の発生予測モデルを発展させるため,新たにすべり剛体ブロック連成モデルを提案する.また,本研究で提案するすべり剛体ブロック連成モデルを用いて,これまでその影響が不明瞭であった地震動の方向性と斜面崩壊危険度の関連も整理する.さらに,すべり剛体ブロック連成モデルで斜面崩壊が生じた後,災害へと発展する過程を予測するため,発生が予測された崩壊土砂の流動を取り扱えるように,すべり剛体ブロック連成モデルと土石流の数値解析モデルとの統合を試みる.

Outline of Final Research Achievements

To achieve wide-area and accurate prediction of landslides and slope failures during earthquakes, we developed an advanced analytical method using a rigid sliding block. Although we couldn't create a coupled model of multiple rigid blocks, we extended the method to include three-dimensional seismic waves, which previous studies hadn't considered. For wide-area seismic slope-slip hazard assessment, we devised a method to discretize slope angle and orientation, determining hazards for each combination using rigid-slip blocks. Applying AHP-GIS-based analysis to slope failure areas from four earthquakes (2008 Hokkaido, 2008 Kumamoto, 2008 Iwate-Miyagi Nairiku, and 2004 Niigata-Chuetsu) showed topographic factors predominantly influence slope failure distribution. We also developed a numerical simulation model considering collapsed soil inflow on flood flow in river channels, confirming the model can represent changes in flo

Academic Significance and Societal Importance of the Research Achievements

国土の大半を山地が占める日本では,比較的規模の大きな地震が発生すると必ずと言えるほど地すべり・斜面崩壊が発生する.地すべり・斜面崩壊は,道路や水道といったライフラインを破壊する他,発生した崩壊土砂が土石流に発展するなどして広域的長期的に地域社会に影響を与える.そのため,地震による地すべり・斜面崩壊を予測する手法は常に発展させていかなければならない.本研究の研究成果は実用的な手法として広く用いられるまでにはギャップが多数残っているものの,これまでよりも技術レベルを一段上げることに貢献できたと考えられる.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (15 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 4 results)

  • [Int'l Joint Research] パダン州立大学(インドネシア)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Landslide Susceptibility Assessment in the Japanese Archipelago Based on a Landslide Distribution Map2023

    • Author(s)
      Kohno Masanori、Higuchi Yuki
    • Journal Title

      ISPRS International Journal of Geo-Information

      Volume: 12 Issue: 2 Pages: 37-37

    • DOI

      10.3390/ijgi12020037

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluating earthquake-induced widespread slope failure hazards using an AHP-GIS combination2022

    • Author(s)
      Kohno Masanori、Higuchi Yuki、Ono Yusuke
    • Journal Title

      Natural Hazards

      Volume: 2 Pages: 1485-1512

    • DOI

      10.1007/s11069-022-05725-w

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 地すべりハザードマップ作成範囲の大きさが地すべり危険度に及ぼす影響-国道9号出雲市多伎町地すべり地域の例-2022

    • Author(s)
      河野勝宣
    • Journal Title

      第11回土砂災害に関するシンポジウム論文集

      Volume: 11 Pages: 245-250

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of a Numerical Model for Deposition and Flood Propagation by Multiple Inflows of Debris Flows and River Floods2021

    • Author(s)
      WADA Takashi、NAKATANI Kana、SATOFUKA Yoshifumi、MIZUYAMA Takahisa、KOSUGI Ken'ichirou、MIWA Hiroshi
    • Journal Title

      International Journal of Erosion Control Engineering

      Volume: 14 Issue: 2 Pages: 20-30

    • DOI

      10.13101/ijece.14.20

    • NAID

      130008128322

    • ISSN
      1882-6547
    • Year and Date
      2021-12-10
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 地震動の三次元入力を考慮した Newmark 滑りブロックモデル2023

    • Author(s)
      小野祐輔
    • Organizer
      第75回 令和5年度(2023)土木学会中国支部研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] A small-scale laboratory test focusing on slope failure process and accumulation2023

    • Author(s)
      Masanori KOHNO
    • Organizer
      13th International Conference on Geotechnique, Construction Materials and Environment
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 崩壊土塊の側方流入に伴う河道閉塞形成と河川流況変化に関する予測モデルの開発2023

    • Author(s)
      和田孝志
    • Organizer
      令和5年度(公社)砂防学会研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] RELATIONSHIP BETWEEN SLOPE FAILURE DISPLACEMENT AND FREQUENCY OF INPUT GROUND MOTION - NUMERICAL STUDY USING THE SPH METHOD2022

    • Author(s)
      Moe Sasaki and Yusuke Ono
    • Organizer
      The 8th Asia Conference on Earthquake Engineering
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Capture Effect by flat ground on slope failure debris - A study using distinct element analysis2022

    • Author(s)
      Yuto Matsuura, Yusuke Ono and Masanori Kohno
    • Organizer
      The 20th Anniversary International Symposium on Geo-Disaster Reduction
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Examination of a method to evaluate earthquake-induced slope failure hazard using the AHP2022

    • Author(s)
      Masanori KOHNO, Yuki HIGUCHI, Yusuke ONO
    • Organizer
      Third International Symposium on Risk Assessment and Sustainable Stability Design of Slopes
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 階層分析法を用いた地震時の斜面崩壊ハザード評価手法の開発2022

    • Author(s)
      河野勝宣
    • Organizer
      鳥取大学工学部附属地域安全工学センター・とっとり防災・危機管理研究会合同報告会
    • Related Report
      2021 Research-status Report
  • [Presentation] 小規模ハード対策による土石流・洪水流複合氾濫時の避難安全性向上効果2022

    • Author(s)
      和田孝志,丸堂真輝,廣地星大,三輪浩,里深好文
    • Organizer
      令和3年度自然災害研究協議会中国地区部会研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] 斜面下の地盤が崩壊土砂の到達距離に及ぼす影響に関する模型実験2021

    • Author(s)
      松浦悠斗,小野祐輔, 河野勝宣
    • Organizer
      第73回(令和3年度)公益社団法人土木学会中国支部研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] AHP法を用いた地震による斜面崩壊ハザード評価手法の検討2021

    • Author(s)
      樋口裕葵, 河野勝宣, 小野祐輔
    • Organizer
      第73回(令和3年度)公益社団法人土木学会中国支部研究発表会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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