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1991 Fiscal Year Final Research Report Summary

Study of Earthquake Disaster Prevention of Waterfront

Research Project

Project/Area Number 01302044
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field 基礎・土質工学
Research InstitutionTokai, University

Principal Investigator

HAMADA Masanori  Tokai Univ., School of Marine Science and Technology, Professor, 海洋学部, 教授 (30164916)

Co-Investigator(Kenkyū-buntansha) NODA Shigeru  Tottori Univ., Faculty of Engineering, Associate Professor, 工学部, 助教授 (80135532)
TOWHATA Ikuo  Tokyo Univ., Faculty of Civil Engineering, Associate Professor, 工学部, 助教授 (20155500)
KITAHARA Michihiro  Tokai Univ., School of Marine Science and Technology, Associate Professor, 海洋学部, 助教授 (60135522)
WAKAMATSU Kazue  Waseda Univ., Science and Engineering Laboratory, Research Associate, 理工学研究所, 特別研究員 (10132789)
YASUDA Susumu  Kyushu Institute of Technology, Faculty of Civil Engineering, Associate Professo, 工学部, 助教授 (90192385)
Project Period (FY) 1989 – 1991
KeywordsLiquefaction / Permanent Ground Displacement / Waterfront / Reclaimed Ground / Lifeline / Earthquake Hazard Prevention / Foundation Piles / Buried Pipes
Research Abstract

The summary of the results of the present research is as follows ;
(i) It was pointed out based on the state of the art on lifeline performance in reclaimed ground during past earthquakes that specific research subjects such as earthquake motion in the neighborhood of fault, dynamic response of soft ground, liquefaction-induced ground displacement and its effect on buried lifeline facilities should be proceeded to create earthquake-proof urban societies in waterfronts in Japan.
(ii) Liquefaction can cause several kinds of damage to lifeline structures ; settlement and tilting of structures due to reduction of bearing capacity of ground, floating of buried structures due to the buoyancy of the liquefied soil, collapse of quay walls and retaining walls due to earth pressure increase, failure of earth structures like embankment, and damage to liquefaction-induced large ground displacement.
(iii) The liquefaction-induced ground displacements were found during ten past earthquakes in Japan as … More well as in United States. The ground displacements were oriented from sand dunes and natural levees with a little higher elevation towards old streams of big rivers with a lower elevation. The maximum ground displacement reached over 12 m during the 1964 Niigata earthquake.
(iv) The magnitude of the ground displacement has a close correlation with the thickness of the liquefied layer, but not with the gradient of the ground surface. The mechanism of the occurrence of the liquefaction-related large ground displacement has not been clarified. Therefore, more studies on case histories of ground displacement, numerical analyses, experimental studies are required.
(v) The liquefaction-induced ground displacement caused severe damage to buried structures such as foundation piles and pipelines. It was conjectured from examination of damaged structures and experimental studies that a drag force of liquefied soil was applied to the buried structures.
(vi) A method to prevent liquefaction-induced ground displacement, where flexible inground walls are constructed in liquefiable soil, was proposed and its effectiveness was verified by shaking table tests. Less

  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] M.Hamada,K.Wakamatsu,S.Yasuda: "Liguefaction-Induced Ground Deformation during The 1923 Kanto Earthquake" Technical Report,National Center for Earthaquake Engineering Research,U.S.A. 92-00u. 51-1-38 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hamada,S.Yasuda,K.Wakamatsu: "Large Ground Deformations and Their Effects on Lifecliens:The 1948 Fukui Earthquake" Technical Report,National Center for Earthquake Engineering Research,U.S.A.92-001. 2-1-2-41 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hamada: "Large Ground Deformations and Their Effects on Lifelines:The 1964 Niigata Earthquake" Technical Report,National Center for Earthquake Engineering Reseach,U.S.A.92-001. 3-1-3-119 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Hamada: "Large Ground Deforamtions and Their Effects on Lifelines:The 1983 Nijonkai-Chubu Earthquake" Technical Report,National Center for Earthquake Enguneering Research,U.S.A.92-001. 4-1-4-85 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kitahara: "Depth determintion of surface-breaking cracks by a neural network" Review of Progress in Quantitative Nondestructive Evaluation. 10A. 689-696 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 若松 加寿江: "埋立地の液状化の歴史" 土と基礎. 39ー1. 78-84 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Hamada, K. Wakamatsu, S. Yasuda,: "Liquefaction-Induced Ground Deformation during The 1923 Kanto Earthquake" Technical Report, National Center for Earthquake Engineering Research, U. S. A.92-001. 1-1-1-38 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hamada, S. Yasuda, K. Wakamatsu: "Large Ground Deformations and Their Effects on Lifelines : The 1948 Fukui Earthquake" Technical Report, National Center for Earthquake Engineering Research, U. S. A.92-001. 2-1-2-41 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hamada: "Large Ground Deformations and Their Effects on Lifelines : The 1964 Niigata Earthquake" Technical Report, National Center for Earthquake Engineering Research, U. S. A.92-001. 3-1-3-119 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Hamada: "Large Ground Deformations and Their Effects on Lifelines : The 1983 Nihonkai-Chubu Earthquake" Technical Report, National Center for Earthquake Engineering Research, U. S. A.92-001. 4-1-4-85 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Kitahara: "Depth Detemination of Surface-Breaking Cracks by a Neural network" Review of Progress in Quantitative Nondestructive Evaluation. 10A. 689-696 (1991)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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