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Research on the collapse prediction of unsaturated Shirasu slopes in earthquake

Research Project

Project/Area Number 08650587
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geotechnical engineering
Research InstitutionKAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY

Principal Investigator

OKABAYASHI Takumi  KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CIVIL ENGINEERING,ASSOCIATE PROFESSOR, 土木工学科, 助教授 (40044630)

Co-Investigator(Kenkyū-buntansha) NAKIYAMA Yoshihiro  KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF MECHANICAL ENGINEERING,LE, 機械工学科, 講師 (40222179)
SUGIO Satoru  MIYAZAKI UNIVERSITY,DEPARTMENT OF CIVIL ENGINEERING,PROFESSOR, 工学部・土木環境工学科, 教授 (70069524)
UTITANI Tamotu  KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CIVIL ENGINEERING,PROFESS, 土木工学科, 教授 (70038107)
SAITO Riichiro  KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CIVIL ENGINEERING,PROFESS, 土木工学科, 教授 (00037821)
OHTAKE Takaaki  KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CHEMISTRY,ASSOCIATE PROFE (80128339)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsShirasu / Earthquake / Collapse / Stress path / Cyclic triaxial test / Liquefaction / Volcanic soil / Shear stress ratio / 斜面崩壊 / 不飽和 / 三軸試験 / 半別分類
Research Abstract

Shirasu has large pumice stone. Undisturbed Shirasu is seemed such brittle material as soft rock, but disturbed Shirasu is known as a granula soils. Aseries of undrained monotonic triaxial tests has been performed on a volcanic soil Shirasu which has crushable particles. As a result, the undrained cyclic and monotonic shear behavior of Shirasu is found to greatly dependent on the confining pressure and its density. Testing was performed on disturbed spcimens.
(1) The monotonic and cyclic undrained shear behavior of Shirasu shows a strong dependence on confining pressure, Toyoura sand does not.
(2) In the deviator stress ratio and axial strain for loose Shirasu the deviator stress ratio increased with increasing initial effective confining pressur. The deviator stress ratio for dense Shirasu had the opposite trend of decreasing with increasing initial confining pressure.
(3) The shear behavior of loose Shirasu showed increasing dilative characteristics with increasing initial effective confining pressur. That for dense Shirasu, on the other hand, showed increasingly contractile behavior with increasing initial confining pressur as is generally found for sandy.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 兵動 正幸, 荒牧 憲降, 岡林 巧 他2名: "破砕性土の定常状態と液状化強度" 土木学会 論文集. No.554. 197-209 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 岡林 巧 他5名: "桜島降下火山灰の三軸せん断特性" 平成8年度土木学会西部支部研究発表会講演概要集. 376-377 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] R.SAITO, T.OKABAYASHI, T.OHTAKE, M.MIHARA: "Removal of Manganese and Ironions from The Aqueous Solution by using Shirasu and Volcanic Ash" Proceedings of The Second Kyushu-Taipei International Cangress on Chemical Fngineering. 49-52 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村岡 央基, 岡林 巧 他4名: "「入来」しらす地盤のスウェーデン式サウンディング試験" 平成9年度土木学会西部支部研究発表会講演概要集. 其の1. 476-477 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 野元 剛, 岡林 巧 他6名: "「入来」しらすの非排水単調せん断特性" 平成9年度土木学会西部支部研究発表会講演概要集. 其の1. 396-397 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 村田 聡子, 岡林 巧 他6名: "「入来」しらすの非排水繰返しせん断特性" 平成9年度土木学会西部支部研究発表会講演概要集. 其の1. 398-399 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.OKABAYASHI, M.HYODO, A.F.L.HYDE, H.MURATA, N.YASUFUKU: "PROCEEDING OF THE INTERNATIONAL SYMPOSIUM ON VOLCANIC ASH SOILS IN JAPAN-PROPERTIES AND PRACTICAL USE,IS-TOHOKU,JAPAN" Nobuchika Moroto, 162 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takumi OKABAYASHI,Masayuki HYODO Hidekazu MURATA and Noriyuki YASUFUKU: "Monotonic and cyclic undrained shear behavior of liquefied soil Shirasu" Research reports of Kagoshima national college of technology. No.31. 41-44 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Masayuki HYODO,Noritaka ARAMAKI,Takumi OKABAYASHI,Yukio NAKATA and Hidekaze MURATA: "Steady State and Liquefaction Strengths of Crushable Soils" Proceedings of JSCE. No.554/III-37. 197-209 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takumi OKABAYASHI,Masayuki HYODO,A.F.L.Hyde, Hidekazu MURATA and Noriyuki YASUFUKU: "Monotonic and cyclic undrained shear behavior of liquefied soil Shirasu" Research reports of Kagoshima national college of technology. No.32. 37-45 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Ryosuke KITAMURA,Susumu YASUDA and Takumi OKABAYASHI: "Geotechnical Characteristics of SHIRASU" Proceedings of The International Symposium on Volcanic Ash Soils in Japan -Properties and Practical Use-, IS-TOHOKU,Japan. 16-23 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takumi OKABAYASHI,Masayuki HYODO,A.F.L.Hyde, Hidekazu MURATA and Noriyuki YASUFUKU: "Monotonic and Cyclic Undrained Shear Behavior of SHIRASU" Proceedings of The international Symposium on Volcanic Ash Soils in Japan -Properties and Practical Use-, IS-TOHOKU,Japan. 102-109 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsro YAMAMOTO,Takumi OKABAYASHI,Keisaku KUBO,Nao MATSUMOTO,Kenichi GOU and Tomoyuki MIYABE: "The Disasters Induced by the 1997 Kagoshimaken-hokuseibu and Daini-hokuseibu Earthquakes" Ground Engineering. Vol.15, No.1. 57-73 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 兵動正幸, 荒牧憲降, 岡林巧 他2名: "破砕性土の定常状態と液状化強度" 土木学会論文集. No.554. 197-209 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 岡林巧, 他5名: "桜島降下火山灰の三軸せん断特性" 平成8年度土木学会西部支部研究発表会講演概要集. 376-377 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] R.SAITO, T.OKABAYASHI, T.OHTAKE, M.MIHARA: "Removal of Manganese and Ironions from The Aqueous Solution by using Shirasu and Volcanic Ash." Proceedings of The Second Kyushu-Taipei Intermational Congress on Chemical Engineering. 49-52 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 村岡史基, 岡林巧, 他4名: "「入来」しらす地盤のスウェーデン式サウンディング試験" 平成9年度土木学会西部支部研究発表会講演概要集. 其の1. 476-477 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 野元剛, 岡林巧, 他6名: "「入来」しらすの非排水単調せん断特性" 平成9年度土木学会西部支部研究発表会講演概要集. 其の1. 396-397 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 村田聡子, 岡林巧, 他6名: "「入来」しらすの非排水繰返しせん断特性" 平成9年度土木学会西部支部研究発表会講演概要集. 其の1. 398-399 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.OKABAYASHI, M.HYODO, A.F.L.HYDE, H.MURATA, N.YASUFUKU: "PROCEEDING OF THE INTERNATIONAL SYMPOSIUMON VOLCANIC ASH SOILS IN JAPAN-PROPERTIES AND PRACTICAL USE,IS-TOHOKU,JAPAN" Nobuchika Moroto, 162 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 岡林巧,野頭貴昭,村田秀一 他3名: "桜島降下火山灰の三軸せん断特性" 平成8年度土木学会西部支部研究発表会 講演概要集. 1. 376-377 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 岡林巧,兵動正幸,上久保渡 他3名: "乱した一次しらすの非排水繰返しせん断特性" 平成8年度土木学会西部支部研究発表会 講演概要集. 1. 408-409 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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