不規則波が作用する小段付き離岸堤の平衡断面の推算に関する研究 Study on the Equilibrium Profile of Berm Breakwater under Irregular Wave Attack

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Abstract

小段付き離岸堤に波浪が作用しつづけると堤防の前面斜面は変形して,やがて安定した平衡断面となる。本論文は,小段付き離岸堤の不規則波による平衡断面形状を推定することができる簡便な方法を開発したものである。平衡形状は小段の侵食水平長さ,侵食斜面深さ及び平衡底辺幅で定義され,これらはMeerが導入した安定定数だけではなく,本研究で提案する相対小段高さ(小段高さの水深比)の関数となることを明らかにした。新しく導入した関係式は実際の離岸堤設計に充分役立つものと考えられる。

Berm breakwater is a rubble-mund structure, which is allowed to be reshaped by wave attack. The stonesin the seaward sIope dislocate from the initial slope to the equilibrium profile.A simple analysis procedure is developed to obtain the formulas for designing the seaward slope s equilibriumprofile of the bem breakwater under irregular wave attack. These fomulas include parameters such as the horizontal eroded berm, toe width, the vertical eroded bem, which are fomed after the seaward slope of structurebecome equilibrium, and the stability number.A new parameter of relative bem crest height is defined in the present study, because it slightly influencesthe relationships among some other parameters.The fomulas resulted in the present study may be applicable enough to be used in the field design of bermbreak-water.

Journal

  • Journal of Fisheries Engineering

    Journal of Fisheries Engineering 37(3), 203-207, 2001-02-01

    The Japanese Society of Fisheries Engineering

References:  10

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008273914
  • NII NACSIS-CAT ID (NCID)
    AN10278554
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    09167617
  • NDL Article ID
    5723861
  • NDL Source Classification
    ZR26(科学技術--農林水産--水産)
  • NDL Call No.
    Z18-1327
  • Data Source
    CJP  CJPref  NDL  J-STAGE  JASI 
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