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An investigation on effects of countermeasures against liquefaction of sand deposits with structures

Research Project

Project/Area Number 07555445
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field Geotechnical engineering
Research InstitutionTokyo Institue of Technoloty

Principal Investigator

TAKEMURA Jiro (1996)  Tokyo Inst.of Tech., Faculty of Eng., Assosiate Prof., 工学部, 助教授 (40179669)

桑野 二郎 (1995)  東京工業大学, 工学部, 助教授 (30178149)

Co-Investigator(Kenkyū-buntansha) MATSUDA Takashi  Ohbayashi-gumi, Technology Research Center, Vice-senior Researcher, 技術研究所, 副主任研究員
KOUDA Masayuki  Tokyo Inst.of Tech., Faculty of Eng., Research Associate, 工学部, 助手 (10282823)
OKAMUEA Mitsu  Tokyo Inst.of Tech., Faculty of Eng., Research Associate, 工学部, 助手 (50251624)
広岡 明彦  東京工業大学, 工学部, 助手 (70238400)
竹村 次朗  東京工業大学, 工学部, 助教授 (40179669)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordsliquefaction / sand / oil tank / embankment / model test / sheet pile wall / gravel drain / settlement / 矢板壁 / バーチカルドレーン / 矢板
Research Abstract

Centrifuge model tests are carried out to study the effect of various countermeasures against liquefaction of sand deposits with an undergrond structure and a structure on surface. Model tests are conduced on five types of models ; one without any countermeasures and four with countermeasures ; sheet pile walls with or without drainage capability, sheet pile walls of which tops are tied with rods and gravel drains.
Following conludsions are drawn from this study.
1.For foundation soil with an underground structure, upward movements of it take place when excess pore pressure beneath the structure reaches a threshold value. In countermeasures to prevent the upward movement, an attempt should be made to keep the excess pore pressure lower than this threshold.
2.Responses of acceleration of structures depend very much on the excess pore pressures generated in foundation soil. The acceleration responses at the very early stages of input motons are similar for all the cases, but the subsequcnt responsese differ for different types of countermeasure. For the cases without drainage, the acceliration of structure decreases with the generation of excess pore pressure. On the other hand, for the cases with drainage, the acceleration of structure increase.
3.Settlements of structures on a ground surface like oil tank and embankment arise from two reasons ; the compression of sand beneath due to consolidation and the other the lateral movement of hte sand. Increase of lateral movement gives rise to an increase in total settlements of the structure, suppression of lateral spreading is necessary.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] Kimura, T.et al.: "Countermeasures against liquefaction of sand deposits with structures" 1st International Conf.on Earthquake Geotechnical Eng.(pre-print). 163-184 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 郭 家佐 ら: "砂地盤上の既設タンクの液状化対策工に関する研究" 第30回土質工学研究発表会. 2. 1061-1064 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 布川 修 ら: "砂地盤上の既設盛土の液状化対策に関する研究" 土木学会第50回年次学術講演会講演概要集. IIIA. 546-547 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 布川 修 ら: "液状化対策工としての締め切り矢板工法の効果" 第32回地盤工学研究発表会. (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 布川 修 ら: "地震時盛土締切り矢板の挙動" 第32回地盤工学研究発表会. (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kimura, T.et.Al.: "Countermeasures against liquefaction of sand deposits with structures" 1^<ST> International Conf.on Earthquake Geotechnical Eng., Pre-Print. 163-184 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Guo, J.Y.et al.: "Studies on countermeasures against liquefaction of sand supporting a tank structure" 30^<th> Japan National Conference on Soil Mechanics and Foundation Eng.1061-1064 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nunokawa, O.et al: "Study on countermeasures against liquefaction with embankement on sand deposit" Proceedings of the 50^<th> Annual Conf.on the Japan Society of Civil Engineers. III. 546-547

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nunokawa, O.et al: "Effect of sheet pile on stability of embankment on saturated loose sand during earthquake" Proceeding of the 32^<nd> Japan National Conference on Geotechnical Eng.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nunokawa, O.et al: "Behavior of sheet pile in loose sand subjected to fill loading during earthquake" Proceeding of the 32^<nd> Japan National Conference on Geotechnical Eng.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tsutomu Kimura: "Countermeasures against liquefaction of sand deposits with structures" Proc.1st lnt.Conf.Earthquake Geotechnical Engineering. 163-184 (1995)

    • Related Report
      1996 Annual Research Report

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

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