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Development of multiscale multi-physics rock mechanics for swelling rock mass

Research Project

Project/Area Number 16H02361
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionTohoku University

Principal Investigator

Kyoya Takashi  東北大学, 工学研究科, 教授 (00186347)

Co-Investigator(Kenkyū-buntansha) 森口 周二  東北大学, 災害科学国際研究所, 准教授 (20447527)
寺田 賢二郎  東北大学, 災害科学国際研究所, 教授 (40282678)
松原 成志朗  東北大学, 工学研究科, 助教 (40823638)
山田 正太郎  東北大学, 工学研究科, 准教授 (70346815)
大河原 正文  岩手大学, 理工学部, 准教授 (80223741)
加藤 準治  東北大学, 工学研究科, 准教授 (00594087)
長田 昌彦  埼玉大学, 理工学研究科, 教授 (00214114)
高瀬 慎介  東北大学, 工学研究科, 助教 (00748808)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥43,160,000 (Direct Cost: ¥33,200,000、Indirect Cost: ¥9,960,000)
Fiscal Year 2019: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2018: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2017: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2016: ¥21,060,000 (Direct Cost: ¥16,200,000、Indirect Cost: ¥4,860,000)
Keywords膨潤性岩盤 / 地下構造物 / マルチスケール / マルチフィジックス / 数値解析 / スメクタイト膨潤試験 / 膨潤試験装置 / トンネル掘削解析 / 膨潤解析 / 修正カムクレイモデル / 3次元有限要素法 / スメクタイト類 / 膨潤挙動 / 岩盤力学 / 岩石膨潤現象 / スメクタイト鉱物 / 岩盤工学
Outline of Final Research Achievements

In order to resolve the problem of deterioration of underground structures after construction due to swelling of rock mass we have developed a new multiscale multi-physics rock mechanics approach. We carried out laboratory swelling tests of montmorillonite and formulated a thermodynamics model for the swelling behavior. We also formulated a numerical analysis model based on the modified Cam-Clay model that can predict deteriorating strength and stiffness of rock mass along with a rigorous return-mapping algorism. Then we developed a multiscale multi-physics analysis model for swelling rock mass by Incorporating the thermodynamics swelling model into the Cam-Clay type model. A series of analyses of a tunnel within a swelling rock mass predicted displacement and stress distribution around the tunnel in good agreement with measured data. We conclude therefore the validity and effectiveness of this proposed multiscale multi-physics rock mechanics theoretical model.

Academic Significance and Societal Importance of the Research Achievements

近年,建設から数十年経つトンネル等の地下構造物が,岩盤の膨潤によって損傷し,その機能が著しく劣化する事象が多数生起しており,道路や橋梁などと共に社会基盤施設の健全な維持管理の大きな問題の一つとして顕現している.本研究は,そうした維持管理技術の高度化に資する点に社会的意義がある.また,本研究はスメクタイトの化学的な吸水膨潤挙動に対する熱力学モデルの定式化と,岩盤の材料劣化にともなう剛性と強度の低下を表現できる数値解解析モデルを融合させたマルチスケール・マルチフィジックス岩盤解析モデルの開発を通して,岩盤の力学挙動を扱うための新しいアプローチ手法の確立に取り組んだ点に学術的意義がある.

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (5 results)

All 2020 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] 割線剛性を用いた簡便なマルチスケール解析による膨潤性地山のトンネル安定性評価2019

    • Author(s)
      劉暁東,鵜ノ沢均,加藤準治, 京谷孝史
    • Journal Title

      日本計算工学会論文 (Transactions of JSCES),

      Volume: No. 2108004

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 割線剛性を用いた簡便なマルチスケール解析による膨張性地山のトンネル安定性評価2018

    • Author(s)
      劉暁東,鵜ノ沢均,加藤準治,京谷孝史
    • Journal Title

      Transactions of JSCES, Paper No. 2018004

      Volume: 2018 Pages: 0014-0014

    • NAID

      130007497442

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] NUMERICAL ANALYSIS OF THE MECHANICAL BEHAVIOR OF A TUNNEL EXCAVETED IN SWELLING ROCKMASS2020

    • Author(s)
      Xiaodong Liu, Seishiro Matsubaraa, Shotaro Yamadaa and Takashi Kyoya
    • Organizer
      第47回岩盤力学に関するシンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Numerical Analysis of a Tunnel in Swelling Rockmass by a Modified Cam-Clay Based Model2019

    • Author(s)
      Xiaodong Liu, Seishiro Matsubaraa, Shotaro Yamadaa and Takashi Kyoya
    • Organizer
      5th ISRM Young Scholar's Symp. on Rock Mech. and Int. Symp. on Rock Eng. for Innovative Future
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] トンネルの膨潤挙動に対する熱力学的解析モデル2019

    • Author(s)
      山本颯人,京谷孝史,松原成志朗,劉 暁東
    • Organizer
      令和元年度土木学会全国大会第74回年次学術講演会
    • Related Report
      2019 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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