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1994 Fiscal Year Final Research Report Summary

On the limit and rate of erosion of river bank

Research Project

Project/Area Number 05452243
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 水工水理学
Research InstitutionHIROSHIMA UNIVERSITY (1994)
Tokyo Institute of Technology (1993)

Principal Investigator

FUKUOKA Shoji  Department of Civil and Environmental Engineering, Hiroshima Univ.Professor, 工学部, 教授 (30016472)

Co-Investigator(Kenkyū-buntansha) TAKEMURA Jiro  Department of Civil Engineering, Tokyo Inst.of Technology, Associate Professor, 工学部, 助教授 (40179669)
Project Period (FY) 1993 – 1994
KeywordsNatural bank / Overhanging and Collapse / Countermeasure / Failure of embankment / Centrifuge model test / Field Test
Research Abstract

Silt channel and clay channel were dug on the flood plain of the Ara river and Rokkaku river, respectively, where erosion rate of bed and bank were investigated in detail. Erosion process of silt channel consists of formation of overhanging bank, collapse, and transport. Analytical model which provides physical explanation was constructed. Erosion process of clay bank was influenced by water content, density, and clay sedimentation process. Evaluation of these effects on erosion rate was attempted. Critical length at the instant when the overhanging bank is about to collapse was estimated. The countermeasure against the bank erosion was studied in the aspect of hydraulics : installation of vane array, utilization of live vegetation beside the bank such as reed, making the bank gentler. We developed a basis of technology and learning for protection method corresponding to hydraulic condition and bank soil condition by synthesizing of these knowledge.
Two series of centrifuge model tests were carried out to investigate the stability of loose embankments subjected to a seepage flow. One is a modelling of prototype for an unreinforced embankment with the prototype height of 3.5m under 25g and the other is tests for embankments reinforces with piles under different conditions of pile density and protile of water surface. Observed behavior in the model embankment was very similar to that in the large scale 1g model. It was found that the deformation at the initial stage cannot be prevented by reinforcement with pile, however the catastrophic failure followed by the deformations can be prevented by the reinforcement.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 渡辺明英、福岡捷二: "河岸侵食を防止するベーン工の設計法の研究" 土木学会論文集. 485/II-26. 55-64 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福岡捷二、西村達也、大東道郎: "ヒサシ状河岸の流れと河床変動の解析" 都市急流河川の流れと河床変動の数値解析に関するシンポジウム. 171-174 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shoji Fukuoka: "Erosion Processes on Natural River Bank" Proc.1st Int.Symp.on Hydraulic Measurement. 223-229 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福岡捷二、渡辺明英、新井田 浩、佐藤健二: "オギ・ヨシ等の植生の河岸保護機能の評価" 土木学会論文集. 503/II-29. 59-68 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] J.Takemura,T.Kimura and A.Hiro-oka: "Failure of embankments due to seepage flow and its countermeasure" Proc.International Conference Centrifuge 94. 575-580 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 金縄知樹、岩本敏彦、竹村次朗、広岡明彦、村石 尚: "降雨時の斜面崩壊対策について" 第29回土質工学研究発表会講演集. 3. 1797-1798 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 福岡捷二、西村達也、三宮 武、藤原 剛: "土木学会論文集" 緩傾斜河岸を設置した河道弯曲部の流れと河床形状, 13 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akihide Watanabe and Shoji Fukuoka: "Design Method of Vane Works for Preventing Bank Erosion" Journal of Hydraulic, Coastal and Environmental Engineering, Japan Society of Civil Engineers. No. 485/II-26. 55-64 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shoji Fukuoka, Tatsuya Nishimura and Michio Daitoh: "Analysis of Flow and Bed Topography in Channels with Overhanging Bank" Symposium on Flow and Bed Topography in Urbanized River, Committee on Hydraulic Engineering, JSCE. 171-174 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shoji Fukuoka: "Erosion Processes on Natural River Bank" Proc. 1st Int. Symp. on Hydraulic Measurement. 223-229 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shoji Fukuoka, Akihide Watanabe , Hiroshi Ni-ida and Kenji Sato: "The Bank Protecting Functions of Common Reed and Ditch Reed" Journal of Hydraulic, Coastal and Environmental Engineering, Japan Society of Civil Engineers. No. 503/II-29. 59-68 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Jiro Takemura, Tsvtomu Kimura and Akihiko Hirooka: "Failure of embankments due to seepage flow and its countermeasure" Proc. International Conference Centrituge 94. 575-580 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tomoki Kanenawa, Toshihiko Iwamoto, Jiro Takemura, Akihiko Hirooka and Hisashi Muraishi: "Countermeasures of Slope Failure during rainfall" The 29th Japan National Conference on Soil and Foundation Engineering. Vol.3. 1797-1798 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shoji Fukuoka, Tatsuya Nishimura, Takeshi Sannomiya and Tsuyoshi Fujiwara: "Flow and Bed Profiles in Curved Channels with Gentler Bank Slopes" Journal of Hydraulic, Coastal and Environmental Engineering, Japan Society of Civil Engineers. No.509/II-30. 155-167 (1995)

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

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Published: 1996-04-15  

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