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Practical study on rainfall water infiltration and slope failure mechanism in natural stratified slopes based on distributed sensor observations

Research Project

Project/Area Number 18H01674
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 25030:Disaster prevention engineering-related
Research InstitutionGunma University

Principal Investigator

Wakai Akihiko  群馬大学, 大学院理工学府, 教授 (90292622)

Co-Investigator(Kenkyū-buntansha) 笹原 克夫  高知大学, 教育研究部自然科学系理工学部門, 教授 (90391622)
Bhandary NetraPrakash (N.P Bhandary)  愛媛大学, 社会共創学部, 教授 (10363251)
蔡 飛  群馬大学, 大学院理工学府, 准教授 (20312902)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywords斜面 / 変形 / クリープ / 繰返し降雨 / 地すべり / 崩壊 / 構成則 / 有限要素法
Outline of Final Research Achievements

In this study, the attention was paid to the repeated rainfall conditions which follow the process such as rainfall, quiet period, and re-rainfall. In order to clarify the effect of rainfall on slope stability and its creep deformation, field observations, model experiments, and element tests were carried out. In addition to development a mechanical model to simulate characteristic phenomena that may be observed at an early stage before the slope failure, a few important findings related to the essence of such complicated phenomena relevant to rainfall-induced slope failures were obtained. Furthermore, a finite element code that implements the above model was developed and the possibility of applying it to the practice of disaster prevention was validated. The obtained results is an important clue to prevent slope disasters in the rainy season when rainfall continues intermittently, and contribute to the sophistication of warning and evacuation standard.

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は,斜面変動のメカニズムを多面的に解釈した点にあり,成果は斜面変動予測の実務に資する。現地計測との連携などを通じて,急傾斜地対策工事における突発的な土砂災害の防止,あるいは,豪雨時や融雪時などに急速に速度を増加させる恐れのある地すべり運動の監視業務等において,現場技術者の適切な意思決定を支援することにもつながる。また,斜面近傍の住民や社会基盤施設の安全確保のための早期警戒避難の発令や降雨後の警報解除の適切な時期選定を考える上での基準雨量の高度化に資することが期待され,地球規模の気候変動に伴う今後の極端気象災害防止に向けた実践的な研究として,社会的意義も大きい。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (34 results)

All 2021 2020 2019 2018

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 3 results) Presentation (24 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Numerical simulation of a creeping landslide case in Japan2021

    • Author(s)
      Akihiko Wakai, Deepak Raj Bhat, Kenta Kotani, and Soichiro Osawa
    • Journal Title

      Understanding and Reducing Landslide Disaster Risk, ICL Contribution to Landslide Disaster Risk Reduction

      Volume: Vol.4 Pages: 273-280

    • DOI

      10.1007/978-3-030-60706-7_26

    • ISBN
      9783030607050, 9783030607067
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 安全率とすべり速度の経験則を粘性定式化に応用した地すべり運動の有限要素シミュレーション2021

    • Author(s)
      若井明彦,小谷健太,大澤宗一郎,Deepak Raj Bhat,相楽 渉
    • Journal Title

      日本地すべり学会誌

      Volume: 第58巻,第1号 Pages: 1-15

    • NAID

      130007985900

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of Intervals Measuring Surface Displacement on Time Prediction of Slope Failure Using Fukuzono Method2021

    • Author(s)
      Naoki Iwata and Katsuo Sasahara
    • Journal Title

      Understanding and Reducing Landslide Disaster Risk, ICL Contribution to Landslide Disaster Risk Reduction

      Volume: - Pages: 307-313

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Velocity and Acceleration of Surface Displacement in Sandy model Slope with Various Slope Conditions2021

    • Author(s)
      Katsuo Sasahara
    • Journal Title

      Understanding and Reducing Landslide Disaster Risk, ICL Contribution to Landslide Disaster Risk Reduction

      Volume: - Pages: 315-320

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Landslide Field Experiment on a Natural Slope in Futsu City, Chiba Prefecture2021

    • Author(s)
      Hirotaka Ochiai, Katsuo Sasahara, and Yusuke Koyama
    • Journal Title

      Understanding and Reducing Landslide Disaster Risk, ICL Contribution to Landslide Disaster Risk Reduction

      Volume: - Pages: 169-176

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of groundwater vulnerability to nitrate in shallow aquifer using multi-layer fuzzy inference system within GIS environment2020

    • Author(s)
      Dhundi Raj Pathak and Netra Prakash Bhandary
    • Journal Title

      Groundwater for Sustainable Development

      Volume: 11 Pages: 100470-100470

    • DOI

      10.1016/j.gsd.2020.100470

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Evaluation of an instability for a full-scale model slope under multi-step excavation based on the monitoring of 2-dimensional displacements2019

    • Author(s)
      笹原克夫,平岡伸隆,吉川直孝,伊藤和也
    • Journal Title

      Japanese Geotechnical Journal

      Volume: 14 Issue: 4 Pages: 363-375

    • DOI

      10.3208/jgs.14.363

    • NAID

      130007772736

    • ISSN
      1880-6341
    • Year and Date
      2019-12-25
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 高知県小島地すべりにおける異なる深さのせん断帯の変位量増加に対する降雨の影響の相違2019

    • Author(s)
      笹原克夫
    • Journal Title

      日本地すべり学会誌

      Volume: 56(2) Pages: 3-12

    • NAID

      130007635244

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 高知県小島地すべりにおける異なる深さのせん断帯の変位量増加に対する降雨の影響の相異2019

    • Author(s)
      笹原克夫
    • Journal Title

      日本地すべり学会誌

      Volume: 56(3) Pages: 3-12

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 地盤の変形特性に応じた貯留係数の算定と堤防浸透に与える影響の検討2021

    • Author(s)
      佐藤杏一、蔡飛
    • Organizer
      第56回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 被圧地下水を考慮したクリープ性地すべりのFEM解析2020

    • Author(s)
      大澤宗一郎,小谷健太,若井明彦
    • Organizer
      第75回土木学会年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 福島県で発生したクリープ性地すべりを対象とする弾粘塑性FEM解析2020

    • Author(s)
      大澤宗一郎,Deepak Raj Bhat,若井明彦,笹原克夫,Netra Prakash Bhandary,蔡飛
    • Organizer
      第59回日本地すべり学会研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 異なる斜面条件を有する砂質模型斜面の変位速度-加速度関係2020

    • Author(s)
      笹原克夫
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 京都府綾部市安国寺裏斜面測線1における表層崩壊に着目した動態観測結果(2019年度)の一考察2020

    • Author(s)
      小泉圭吾,小田和広,伊藤真一,藤本将光,矢野晴彦,鏡原聖史,笹原克夫
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 京都府綾部市安国寺の現地雨量に対するアメダス綾部の雨量と解析雨量の適用性2020

    • Author(s)
      神原陵祐,小田和広,矢野晴彦,小泉圭吾,伊藤真一,藤本将光,鏡原聖史,笹原克夫
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 地下水位上昇速度が異なる砂質斜面の変位速度と崩壊時刻2020

    • Author(s)
      笹原克夫
    • Organizer
      日本地すべり学会 第59回研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 京都府綾部市安国寺裏斜面の体積含水率と地下水位の考察(その2)2020

    • Author(s)
      清水大雅,綾部大吾,加藤諒,小田和広,矢野晴彦,小泉圭吾,伊藤真一,藤本将光,鏡原聖史,笹原克夫
    • Organizer
      土木学会第75回学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Possibilities of resonance in ground-building shaking in the Kathmandu Valley during the 2015 Nepal Earthquake2020

    • Author(s)
      Netra Prakash Bhandary
    • Organizer
      The 18th International Symposium on Geo-disaster Reduction, 20-23 November 2020, Beijing, China
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Residual-state shear creep behavior of clayey materials and its implications in understanding landslide creep failure2020

    • Author(s)
      Netra Prakash Bhandary
    • Organizer
      International Webinar on Recent Advances in Geotechnical Engineering Research and Practice, 1-10 July 2020, India
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 比貯留係数が降雨時斜面内の水圧変化に及ぼす影響の検討2020

    • Author(s)
      荒木将太、蔡飛
    • Organizer
      第17回地盤工学会関東支部発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] FEM-based numerical analysis of a creeping landslide2019

    • Author(s)
      Deepak Raj Bhat, Kenta Kotani and Akihiko Wakai
    • Organizer
      第58回日本地すべり学会研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 弾粘塑性有限要素法による地下水位と連動した地すべり運動のパラメトリックスタディ2019

    • Author(s)
      小谷健太,大澤宗一郎,若井明彦
    • Organizer
      第58回日本地すべり学会研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 繰り返し降雨を受ける砂質模型斜面の変位速度-加速度関係2019

    • Author(s)
      笹原克夫
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Residual-state Shear Creep Behavior of Landslide Clay Materials2019

    • Author(s)
      Bhandary N.P.
    • Organizer
      Nepal Geotechnical Society Silver Jubilee Memorial Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] GIS解析を用いた平成30年7月豪雨による広島県呉市東部広域傾斜地の不安定化マップの作成2019

    • Author(s)
      矢野貴洋,バンダリ・ネトラ・プラカシュ,内藤周平
    • Organizer
      平成31年度地盤工学会四国支部技術研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Use of XRAIN data in analyzing localized influence of rain intensity on slope failure in Kure area of Hiroshima during the 2018 heavy rain-induced disasters2019

    • Author(s)
      Maria D. S. R.N.J., Bhandary N.P., Kato R.
    • Organizer
      平成31年度地盤工学会四国支部技術研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 地盤の形状に応じた比貯留係数の算定と地盤内に与える影響に関する検討2019

    • Author(s)
      佐藤杏一,蔡飛
    • Organizer
      第16回地盤工学会関東支部発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 平面ひずみ状態の貯留係数の算定と堤防の浸透に与える影響に関する検討2019

    • Author(s)
      佐藤杏一,蔡飛
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Numerical Simulation of a Creeping Landslide: A Case Study2018

    • Author(s)
      Deepak Raj Bhat, Akihiko Wakai and Kenta Kotani
    • Organizer
      第53回地盤工学研究発表会講演集
    • Related Report
      2018 Annual Research Report
  • [Presentation] クリープ性地すべりのモデル化とパラメトリックスタディ2018

    • Author(s)
      小谷健太,Deepak RAJ BHAT,若井明彦
    • Organizer
      第53回地盤工学研究発表会講演集
    • Related Report
      2018 Annual Research Report
  • [Presentation] すべり面の間隙水圧と変位速度の履歴経路を再現するための解析的試み2018

    • Author(s)
      若井明彦,Deepak Raj Bhat,小谷健太
    • Organizer
      第57回日本地すべり学会研究発表会講演集
    • Related Report
      2018 Annual Research Report
  • [Presentation] Finite element simulation for the creeping behaviour of a landslide induced by snow melt water2018

    • Author(s)
      Wakai, A., Raj Bhat, D. and Kotani, K.
    • Organizer
      Proc. 7th Technical Conference in Eastern Asia on Geo-Natural Disasters
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高知県小島地すべりにおける異なる深さのせん断帯での変位に対する降雨の影響の相異2018

    • Author(s)
      笹原克夫
    • Organizer
      第57回日本地すべり学会研究発表会
    • Related Report
      2018 Annual Research Report
  • [Book] Introduction -Testing, Modeling and Risk Assessment, B. Tiwari et al. (eds.), Understanding and Reducing Landslide Disaster Risk, ICL Contribution to Landslide Disaster Risk Reduction, pp.1-8, AG20212021

    • Author(s)
      Binod Tiwari, Beena Ajmera, Sabatino Cuomo, Katsuo Sasahara and Ryosuke Uzuoka
    • Publisher
      Springer Nature Switzerland
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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