Rigid plastic FE slope stability analysis combined with rain fall water infiltration

Yu Ando, Kentaro Suda, Shinji Konishi, Hirokazu Akaki

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    This paper presents a new slope stability analysis regarding rainfall-induced landslides by coupling a saturatedunsaturated seepage analysis and a rigid plastic finite element method (RP-FEM). Currently, a more valid and reliable disaster prevention system detecting the risk of slope instability due to sudden intense rainfall is required in Japan. However, conventional slope stability methods often fail to predict this new type of landslides. Therefore, the aim of this study is to propose the new slope stability analysis method in the context of rainfall infiltration. This method introduces the effect of seepage force, an increase of unit weight and a reduction of apparent cohesion due to the change in soil suction to obtain the slope stability load factors and collapse mechanisms. Consequently, this method can provide the relatively accurate and valid analysis results, which can be well compared with experimental data. Moreover, it is ascertained that this method can evaluate the different type of slope failure mechanisms: an initial small failure at the toe of the slope caused by the seepage forces and a large-scale failure due to the degradation of the soil apparent cohesion.

    Original languageEnglish
    Title of host publication6th Japan-China Geotechnical Symposium, SJGS 2015
    PublisherJapanese Geotechnical Society
    Pages23-28
    Number of pages6
    DOIs
    Publication statusPublished - 2015
    Event6th Japan-China Geotechnical Symposium, SJGS 2015 - Hokkaido, Japan
    Duration: 2015 Aug 312015 Sep 1

    Other

    Other6th Japan-China Geotechnical Symposium, SJGS 2015
    CountryJapan
    CityHokkaido
    Period15/8/3115/9/1

    Fingerprint

    Slope stability
    slope stability
    Infiltration
    stability analysis
    Rain
    Seepage
    infiltration
    plastic
    Plastics
    Landslides
    seepage
    Water
    cohesion
    rainfall
    landslide
    Disaster prevention
    Soils
    water
    failure mechanism
    slope failure

    Keywords

    • Infiltration
    • Numerical Analysis
    • Rainfall
    • Slope Stability

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

    Cite this

    Ando, Y., Suda, K., Konishi, S., & Akaki, H. (2015). Rigid plastic FE slope stability analysis combined with rain fall water infiltration. In 6th Japan-China Geotechnical Symposium, SJGS 2015 (pp. 23-28). Japanese Geotechnical Society. https://doi.org/10.3208/jgssp.JPN-21

    Rigid plastic FE slope stability analysis combined with rain fall water infiltration. / Ando, Yu; Suda, Kentaro; Konishi, Shinji; Akaki, Hirokazu.

    6th Japan-China Geotechnical Symposium, SJGS 2015. Japanese Geotechnical Society, 2015. p. 23-28.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Ando, Y, Suda, K, Konishi, S & Akaki, H 2015, Rigid plastic FE slope stability analysis combined with rain fall water infiltration. in 6th Japan-China Geotechnical Symposium, SJGS 2015. Japanese Geotechnical Society, pp. 23-28, 6th Japan-China Geotechnical Symposium, SJGS 2015, Hokkaido, Japan, 15/8/31. https://doi.org/10.3208/jgssp.JPN-21
    Ando Y, Suda K, Konishi S, Akaki H. Rigid plastic FE slope stability analysis combined with rain fall water infiltration. In 6th Japan-China Geotechnical Symposium, SJGS 2015. Japanese Geotechnical Society. 2015. p. 23-28 https://doi.org/10.3208/jgssp.JPN-21
    Ando, Yu ; Suda, Kentaro ; Konishi, Shinji ; Akaki, Hirokazu. / Rigid plastic FE slope stability analysis combined with rain fall water infiltration. 6th Japan-China Geotechnical Symposium, SJGS 2015. Japanese Geotechnical Society, 2015. pp. 23-28
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    abstract = "This paper presents a new slope stability analysis regarding rainfall-induced landslides by coupling a saturatedunsaturated seepage analysis and a rigid plastic finite element method (RP-FEM). Currently, a more valid and reliable disaster prevention system detecting the risk of slope instability due to sudden intense rainfall is required in Japan. However, conventional slope stability methods often fail to predict this new type of landslides. Therefore, the aim of this study is to propose the new slope stability analysis method in the context of rainfall infiltration. This method introduces the effect of seepage force, an increase of unit weight and a reduction of apparent cohesion due to the change in soil suction to obtain the slope stability load factors and collapse mechanisms. Consequently, this method can provide the relatively accurate and valid analysis results, which can be well compared with experimental data. Moreover, it is ascertained that this method can evaluate the different type of slope failure mechanisms: an initial small failure at the toe of the slope caused by the seepage forces and a large-scale failure due to the degradation of the soil apparent cohesion.",
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    AB - This paper presents a new slope stability analysis regarding rainfall-induced landslides by coupling a saturatedunsaturated seepage analysis and a rigid plastic finite element method (RP-FEM). Currently, a more valid and reliable disaster prevention system detecting the risk of slope instability due to sudden intense rainfall is required in Japan. However, conventional slope stability methods often fail to predict this new type of landslides. Therefore, the aim of this study is to propose the new slope stability analysis method in the context of rainfall infiltration. This method introduces the effect of seepage force, an increase of unit weight and a reduction of apparent cohesion due to the change in soil suction to obtain the slope stability load factors and collapse mechanisms. Consequently, this method can provide the relatively accurate and valid analysis results, which can be well compared with experimental data. Moreover, it is ascertained that this method can evaluate the different type of slope failure mechanisms: an initial small failure at the toe of the slope caused by the seepage forces and a large-scale failure due to the degradation of the soil apparent cohesion.

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