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Prediction of damage to tide protection facilities due to liquefaction in the lowlands of eastern Tokyo

Research Project

Project/Area Number 20K04682
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22030:Geotechnical engineering-related
Research InstitutionKobe University

Principal Investigator

Takeyama Tomohide  神戸大学, 工学研究科, 教授 (00452011)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords地震応答解析 / 過圧密比 / 機械学習 / 液状化 / 地盤モデル / ゼロメートル地帯
Outline of Research at the Start

江東デルタの低平地には地下水くみ上げにより広域的に地盤沈下が生じたため、地盤高が満潮位よりも低いゼロメートル地帯と呼ばれる地域がある。首都圏では臨海地域全体への高潮の侵入を防ぐために防潮施設が設置されている。現在、首都直下地震の発生が懸念されており、対策がとられているが、地震による揺れや液状化によって、防潮施設が被災し、機能不全を起こす可能性が全くないわけではない。そのため、首都直下地震による東京都東部低地を対象とした広域的かつ高精度な被害予測が必要である。本研究では、東京東部低地の地震応答・液状化シミュレーションを行い、防潮施設や治水施設に与える被害の程度を評価する。

Outline of Final Research Achievements

In this study, a method was developed to create a three-dimensional ground model using the results of borehole investigations and other data. A machine learning method was developed to estimate the over consolidation ratio, a parameter that represents the stress history experienced by the ground, among the material constants of the ground. Observed earthquake records and simulation results were used to train the neural network. An analysis code for seismic response analysis was developed to enable parallel computation on a GPU. Readability was emphasized so that the analysis code can be easily maintained and extended. A ground model of the 23 wards of Tokyo was created and earthquake response analysis was performed to evaluate liquefaction risk.

Academic Significance and Societal Importance of the Research Achievements

研究成果の学術的意義や社会的意義(200字程度,最大300文字,改行2回まで)
広域の三次元地盤モデルをボーリングデータ等から,ほぼ自動的に構築する技術開発を行った.学術的意義としては,簡易的な地盤調査のみでは困難な過圧密比の推定を機械学習により可能であることを示した.土粒子と間隙水の相互作用を考慮した物理モデルに基づくシミュレーションに使用することを前提とした数値モデルであり,これにより液状化リスク評価を広域にシミュレーションベースで行えることが社会的意義である.

Report

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

    (16 results)

All 2023 2022 2021

All Journal Article (10 results) (of which Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (6 results)

  • [Journal Article] AUTOMATIC CONSTRUCTION OF GROUND MODELS FOR 3D FINITE ELEMENT ANALYSIS BY DATA PROCESSING2023

    • Author(s)
      Tamura Ayana, Tomohide Takeyama
    • Journal Title

      International Journal of GEOMATE

      Volume: 24 Issue: 106 Pages: 37-45

    • DOI

      10.21660/2023.106.3746

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] DEVELOPMENTS OF AN AUTOMATIC SETTING SYSTEM OF INPUT DATA AND A LINKAGE SYSTEM FOR EARTHQUAKE SIMULATION AND TSUNAMI SIMULATION2022

    • Author(s)
      ITO Hikaru、TAKEYAMA Tomohide、O-TANI Hideyuki
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)

      Volume: 78 Issue: 2 Pages: I_889-I_894

    • DOI

      10.2208/jscejoe.78.2_I_889

    • ISSN
      2185-4688
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 地盤応答解析コードのGPU並列化2022

    • Author(s)
      堂ヶ原健,竹山智英,銭谷誠司,橘伸也,飯塚敦
    • Journal Title

      神戸大学都市安全研究センター研究報告

      Volume: 26 Pages: 10-19

    • Related Report
      2022 Annual Research Report
  • [Journal Article] A Probabilistic Liquefaction Hazard Assessment for Urban Regions Based on Dynamics Analysis Considering Soil Uncertainties2021

    • Author(s)
      Chen Jian、O-tani Hideyuki、Takeyama Tomohide、Oishi Satoru、Hori Muneo
    • Journal Title

      Journal of Earth Science

      Volume: 32 Issue: 5 Pages: 1129-1138

    • DOI

      10.1007/s12583-021-1431-1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Automatic Construction of Three-Dimensional Ground Model by Data Processing2021

    • Author(s)
      Takeyama Tomohide、O-Tani Hideyuki、Oishi Satoru、Hori Muneo、Iizuka Atsushi
    • Journal Title

      IEEE/ASME Transactions on Mechatronics

      Volume: 26 Issue: 6 Pages: 2881-2887

    • DOI

      10.1109/tmech.2021.3105062

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] LEANING PAGODA OF AYUTTHAYA ANALYSIS WITH THREE-DIMENSIONAL EFFECTS AND GROUND UNCERTAINTY2021

    • Author(s)
      Ito Hajime、Ishida Yuko、Sansaard Veerasak、Takeyama Tomohide、Iizuka Atsushi
    • Journal Title

      International Journal of GEOMATE

      Volume: 20 Issue: 82 Pages: 161-169

    • DOI

      10.21660/2021.82.j2108

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A PROCEDURE TO DETERMINE MATERIAL PARAMETERS BASED ON BOREHOLE DATA IN DYNAMIC ANALYSIS2021

    • Author(s)
      Takeyama Tomohide、Honda Kazuya、Tachibana Shinya、Iizuka Atsushi
    • Journal Title

      International Journal of GEOMATE

      Volume: 21 Issue: 85 Pages: 1-9

    • DOI

      10.21660/2021.85.j2228

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] LIQUEFACTION RISK ASSESSMENT IN THE 23 WARDS OF TOKYO USING ELASTOPLASTIC ANALYSIS2021

    • Author(s)
      Honda Kazuya、Takeyama Tomohide、Tachibana Shinya、Iizuka Atsushi
    • Journal Title

      International Journal of GEOMATE

      Volume: 21 Issue: 86 Pages: 48-54

    • DOI

      10.21660/2021.86.j2270

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 温度勾配による不飽和ベントナイト中の水分移動シミュレーション2021

    • Author(s)
      有井拓也、太田有祐、橘伸也、竹山智英、飯塚敦
    • Journal Title

      Kansai Geo-Symposium 論文集

      Volume: 9 Pages: 218-222

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 機械学習による過圧密比深度分布推定2021

    • Author(s)
      陳冉,竹山智英,銭谷誠司,橘伸也,飯塚敦
    • Journal Title

      神戸大学都市安全研究センター研究報告

      Volume: 25

    • Related Report
      2020 Research-status Report
  • [Presentation] 地盤データの自動構築を目的にした大規模データ検索インベントリ2021

    • Author(s)
      伊関亮太、飯塚敦、竹山智英
    • Organizer
      地盤工学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 広域の三次元有限要素モデルの自動構築とFEM解析プログラムへの適用2021

    • Author(s)
      伊藤輝、竹山智英、大谷英之
    • Organizer
      地盤工学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 動的解析を用いたアーチ効果の液状化への影響評価2021

    • Author(s)
      林啓太、竹山智英、橘伸也、飯塚敦
    • Organizer
      地盤工学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 地盤グリッドモデルを用いた数値解析モデルの自動生成2021

    • Author(s)
      田村彩奈、本田和也、竹山智英、橘伸也、飯塚敦
    • Organizer
      地盤工学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 過圧密比の深度分布と地表面加速度の相関性2021

    • Author(s)
      林勇佑、本田和也、竹山智英、橘伸也、飯塚敦
    • Organizer
      土木学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 過圧密比の深度分布と地表面加速度の相関性2021

    • Author(s)
      林勇佑,本田和也,竹山智英,橘伸也,飯塚敦
    • Organizer
      土木学会
    • Related Report
      2020 Research-status Report

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

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