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Temperature effects on the mechanical and environmental behavior of the ground

Research Project

Project/Area Number 18K13828
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Takai Atsushi  京都大学, 地球環境学堂, 准教授 (30598347)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords温度効果 / 温度圧密 / 地盤環境 / コンシステンシー / 溶出試験 / 地盤改良 / 溶出特性 / 地下温暖化 / 軟弱粘土 / 加温実験 / 逐次抽出試験 / 温度変化 / 変形特性 / 重金属 / 熱ー水ー力学ー化学(THMC)相互作用 / 熱的性質 / 室内試験 / 圧密 / カラム試験 / 温度 / 強度変形特性 / 熱ー水ー力学ー化学(THMC)相互作用
Outline of Final Research Achievements

Under the temperature condition of 10 to 50 Celsius, the plastic limit did not change significantly for any clay, but the liquid limit may decrease or increase with increasing temperature. These tendencies and the magnitude of the change can be determined probably by smectite content and sedimentary environment.
The changes in the consolidation coefficient focusing only on the viscosity coefficient of the pore water can be calculated to 0.87, 1.27, and 1.65 times at 17, 35 and 50 Celsius, respectively, as compared with the case of 23 Celsius. These values match well with the change in coefficient of consolidation obtained from laboratory consolidation test, regardless of the type of clay.
From the results of the leaching test, the As leaching concentration of crushed shale rock was up to 10 times higher at 40 Celsius than at 20 Celsius. It is probably because the desorption of colloidal particles containing aluminum was accelerated due to an increase in temperature.

Academic Significance and Societal Importance of the Research Achievements

地盤温度を23℃から50℃に上昇させることで粘土の圧密係数が1.7倍程度に大きくなることから,適切に粘土地盤を加温できれば,完了までに数ヶ月要する粘土地盤の圧密期間を短縮でき,後続の工事を早期に着手できる。また,間隙水の粘性係数から,圧密係数の変化を概ね推定できる。
掘削岩石は盛土材として再生利用することが考えられるが,そのような浅層地盤では地盤深部に比べ地盤温度の日変動,季節変動が大きい。さらなる検討が必要であるが,本研究で得られた成果から,我が国の岩石に広く分布しているAsの溶出量は,温度変化に対して無視し得ないほど高くなることから,利用条件を考慮して適切に溶出リスクを評価する必要がある。

Report

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

    (21 results)

All 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (12 results) (of which Peer Reviewed: 11 results,  Open Access: 3 results) Presentation (7 results) Remarks (1 results)

  • [Int'l Joint Research] UC San Diego(米国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Long-Term Leaching Behavior of Marine Sediment by a Large Column Percolation Test2020

    • Author(s)
      乾 徹・堀 睦・勝見 武・髙井 敦史
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 69 Issue: 1 Pages: 53-56

    • DOI

      10.2472/jsms.69.53

    • NAID

      130007787255

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2020-01-15
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Laboratory tests on arsenic leaching from excavated shale rock by elevated temperatures2020

    • Author(s)
      Atsushi Takai, Yusuke Iwata, Lincoln W. Gathuka and Takeshi Katsumi
    • Journal Title

      2nd International Conference on Energy Geotechnics (ICEGT 2020)

      Volume: 205 Pages: 09006-09006

    • DOI

      10.1051/e3sconf/202020509006

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of temperature on consolidation and consistency of clayey soils2020

    • Author(s)
      Atsushi Ogawa, Atsushi Takai, Takumi Shimizu and Takeshi Katsumi
    • Journal Title

      2nd International Conference on Energy Geotechnics (ICEGT 2020)

      Volume: 205 Pages: 09010-09010

    • DOI

      10.1051/e3sconf/202020509010

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 温度変化が粘性土の間隙水質および圧密特性に及ぼす影響2020

    • Author(s)
      小河篤史・高井敦史・山口和樹・勝見 武
    • Journal Title

      第14回地盤改良シンポジウム論文集

      Volume: - Pages: 577-582

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 掘削岩石に含まれる自然由来ヒ素の溶出特性の温度・時間依存性2019

    • Author(s)
      岩田侑祐・Lincoln Waweru Gathuka・高井敦史・勝見 武
    • Journal Title

      第13回環境地盤工学シンポジウム発表論文集

      Volume: - Pages: 23-28

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Leaching characteristics of tsunami deposits under dry-wet cyclic condition2019

    • Author(s)
      Tang, J., Sakanakura, H., Nakagawa, M., Ueshima, M., Takai, A., and Katsumi, T.
    • Journal Title

      第13回環境地盤工学シンポジウム発表論文集

      Volume: - Pages: 39-44

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Influence of temperature and soil-water contact time on the leaching characteristics of excavated shale rock2019

    • Author(s)
      Iwata, Y., Gathuka, L.W., Takai, A., and Katsumi, T.
    • Journal Title

      Geo-Environmental Engineering 2019

      Volume: -

    • Related Report
      2019 Research-status Report
  • [Journal Article] 加温による軟弱粘土地盤の圧密促進に関する室内実験2018

    • Author(s)
      高井敦史・赤間拓朗・乾 徹・勝見 武・小河篤史
    • Journal Title

      第13回地盤改良シンポジウム論文集

      Volume: - Pages: 91-94

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] 散水型カラム浸透試験による海成堆積物の長期溶出挙動の評価2018

    • Author(s)
      乾 徹・堀 睦・勝見 武・高井敦史
    • Journal Title

      第13回地盤改良シンポジウム論文集

      Volume: - Pages: 305-308

    • NAID

      130007787255

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Laboratory tests on thermal improvement of soft clay under elevated temperatures2018

    • Author(s)
      Takai, A., Akama, T., Inui, T., Katsumi, T. and Ogawa, A.
    • Journal Title

      Energy Geotechnics: SEG-2018

      Volume: - Pages: 75-82

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] 掘削泥岩に含まれる自然由来ヒ素の溶出挙動に及ぼす温度と溶出時間の影響2018

    • Author(s)
      高井敦史・乾 徹・勝見 武
    • Journal Title

      Kansai Geo-Symposium 2018-地下水地盤環境・防災・計測技術に関するシンポジウム-論文集

      Volume: - Pages: 25-29

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Column Percolation Tests for Evaluating the Leaching Behavior of Marine Sediment Containing Non-anthropogenic Arsenic2018

    • Author(s)
      Inui, T. Hori, M. Takai, A. and Katsumi, T.
    • Journal Title

      Proceedings of the 8th International Congress on Environmental Geotechnics

      Volume: 1 Pages: 469-477

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] カラム通水試験による異なる温度条件での掘削頁岩の溶出特性評価2020

    • Author(s)
      平岡寛星
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] On-site behaviour of heating of soft clayey ground for thermally-accelerated consolidation2020

    • Author(s)
      Sakr Mohammed
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] カラム試験による掘削頁岩の溶出特性に温度が与える影響の評価2020

    • Author(s)
      平岡寛星
    • Organizer
      2020年度土木学会関西支部年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 掘削頁岩の溶出特性に及ぼす温度と固液接触時間の影響2019

    • Author(s)
      岩田侑祐
    • Organizer
      2019年度土木学会関西支部年次学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 自然由来ヒ素を含む掘削岩石の溶出特性に与える温度と固液接触時間の影響2019

    • Author(s)
      岩田侑祐
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 加温条件下での粘土の圧密挙動に関する実験的検討2018

    • Author(s)
      高井敦史・赤間拓朗・乾 徹・勝見 武・小河篤史
    • Organizer
      第53回地盤工学研究発表会
    • Related Report
      2018 Research-status Report
  • [Presentation] カラム浸透試験による自然由来ヒ素を含む海成堆積物の溶出挙動の評価2018

    • Author(s)
      乾 徹・堀 睦・高井敦史・勝見 武
    • Organizer
      第53回地盤工学研究発表会
    • Related Report
      2018 Research-status Report
  • [Remarks] 社会基盤親和技術論分野

    • URL

      http://geotech.gee.kyoto-u.ac.jp/

    • Related Report
      2019 Research-status Report

URL: 

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

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