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Investigation on the formation mechanism of the decollement zone in the viewpoint of geomechanics

Research Project

Project/Area Number 25630200
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Geotechnical engineering
Research InstitutionNagoya Institute of Technology

Principal Investigator

Zhang Feng  名古屋工業大学, 工学(系)研究科(研究院), 教授 (70303691)

Co-Investigator(Kenkyū-buntansha) Sakaguchi Hide  独立行政法人海洋研究開発機構, 数理科学・先端技術研究分野, 分野長 (10235145)
Yamamoto Yuzuru  , 数理科学・先端技術研究分野, 分野長代理 (10435753)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsプレート境界断層 / デコルマ / プロトデコルマ / 動的荷重 / プレート沈み込み運動 / 数値実験 / AMS / SEM / 土・水連成有限変形FEM / 巨視的力学特性 / 微視的構造 / 帯磁率異方性 / 静的・動的載荷 / K0載荷 / Ko載荷 / 等方載荷 / 分岐 / 変形局所化
Outline of Final Research Achievements

Based on the assumption that cyclic loadings may be a main reason for the formation of décollement, siltstone and remolded Fujinomori clay are tested with static/dynamic loads. Meanwhile, anisotropy of magnetic susceptibility (AMS) and SEM are also measured to check the changes of micro-structure of the tested specimen. It is found that no major fabric variation happened though deformation occurred due to cyclic loadings, which is exactly the same as the characteristics of décollement. Furthermore, the process of the oceanic plate subducting beneath into continental plate and the dynamic loading of earthquake are simulated by numerical tests to investigate their influence on décollement. It is found that, the simulated results are similar to the observed micro-structural characteristics of décollement. In other words, the repeated dynamic loading due to earthquake is apparently the main mechanism to form the décollement zone.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (11 results)

All 2015 2014 2013 Other

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 4 results) Presentation (2 results) Remarks (1 results)

  • [Journal Article] Numerical tests on formation mechanism of plate boundary décollement zone due to plate tectonics and earthquake-induced dynamic force2015

    • Author(s)
      Yuhei Kurimoto, Yukimasa Saeda, Feng Zhang
    • Journal Title

      Japanese Geotechnical Society Special Publication

      Volume: 1 Issue: 3 Pages: 11-16

    • DOI

      10.3208/jgssp.JPN-09

    • NAID

      130005095772

    • ISSN
      2188-8027
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanical properties of soft sedimentary rock under K0 and isotropic cyclic loading conditions2015

    • Author(s)
      Yuhei Kurimoto, Yuzuru Yamamoto, Hide Sakaguchi , Feng Zhang and Yukimasa Saeda
    • Journal Title

      JGS special publication

      Volume: Vol.2, No.12 Pages: 498-503

    • NAID

      130005123857

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] プレート沈み込み運動と地震力の複合作用に起因するプレート境界断層の力学挙動2015

    • Author(s)
      栗本悠平,小枝幸真,張鋒
    • Journal Title

      日本計算工学会第20回計算工学講演会論文集

      Volume: Vol.1

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 有限変形FEMを用いた数値実験によるデコルマ形成メカニズムに関する研究2014

    • Author(s)
      栗本悠平,山本由弦,阪口秀,張鋒
    • Journal Title

      日本計算工学会第19回計算工学講演会論文集

      Volume: Vol.1

    • NAID

      40020117663

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical experiments on the influence by shear deformation to the formation of décollement zone2014

    • Author(s)
      Y. Kurimoto, Y. Yamamoto, H. Sakaguchi and F. Zhang
    • Journal Title

      Proc. International Conference of Computational Engineering and Science for Safety and Environmental Problems, COMPSAFE 2014

      Volume: Vol.1 Pages: 150-153

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 有限変形FEMを用いた数値実験によるデコルマ形成メカニズムに関する研究2014

    • Author(s)
      栗本悠平,山本由弦,阪口秀,張鋒
    • Journal Title

      日本計算工学会第19回計算工学会講演会論文集

      Volume: Vol.1

    • NAID

      40020117663

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] 数値実験による巨大水平断層(デコルマ)形成メカニズム解明の試み2013

    • Author(s)
      栗本悠平,西村友宏,小枝幸真,包小華,張鋒
    • Journal Title

      日本計算工学会第18回計算工学会講演会論文集

      Volume: Vol.1

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] 動的繰返し荷重による堆積軟岩の帯磁率異方性発達の実験検証2013

    • Author(s)
      栗本悠平,小枝幸真,張鋒,阪口秀,氏家恒太郎,山本由弦
    • Journal Title

      第25回中部地盤工学シンポジウム論文集

      Volume: Vol.1 Pages: 3-2

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] プレート沈み込み運動と地震力の複合作用に起因するプレート境界断層の力学挙動2015

    • Author(s)
      栗本悠平,小枝幸真,王乾,張鋒
    • Organizer
      第27回中部地盤工学シンポジウム
    • Place of Presentation
      愛知県名古屋市 名古屋大学
    • Year and Date
      2015-08-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] プレート沈み込み運動と地震等の動的外力が複合的に作用するプレート境界断層の力学挙動2015

    • Author(s)
      栗本悠平,小枝幸真,張鋒
    • Organizer
      日本計算工学会第20回計算工学会講演会
    • Place of Presentation
      茨城県つくば市 つくば国際会議場
    • Year and Date
      2015-06-08
    • Related Report
      2015 Annual Research Report
  • [Remarks] 名古屋工業大学 地盤研究室

    • URL

      http://zhang.web.nitech.ac.jp/

    • Related Report
      2014 Research-status Report

URL: 

Published: 2014-07-25   Modified: 2019-07-29  

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