Water for future (물과 미래)

Korea Water Resources Association (한국수자원학회)
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Armouring Effect on Local Scour around Bridge Piers

교각의 세굴에 미치는 Armouring 효과

  • 이종규 (정회원, 한양대학교 공과대학 토목공학과)
  • Published : 1993.12.01
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Abstract

The results of laboratory experiments on the clear-water local scour of cohesionless bed sediment at three types of the pier shape are presented. Based on the experimental data, the relative equilibrium depth of local scour is related to the pier shape, the geometric standard deviation of the bed material, the velocity ratio and the pier Froude number. The relative local scour depths were smallest ant the round-nosed pier and remarkably reduced at the non-uniform bed sediment, comparing with those at the uniform bed material. The effect of sediment grading on the local scour reduction was discussed and compared with Raudkivi and Ettema's experiments.

본 연구는 3가지 교각형상에 대하여 국부적 정지상세굴에 대한 수리실험결과를 분석한 것이다. 실험결과에 의하면 국부적 상대세굴심은 교각형사, 하상입경의 기하표준편차, 유속비, 교각 푸르드수와 관계가 있는 것으로 나타났다. 교각의 상대세굴심은 반원사각형교각에서 가장 작고 하상재료가 균일할 때 보다 불균일할 때 현저하게 작게 나타났다. 입도의 불균일성으로 인한 세굴감소효과는 Raudkivi와 Ettema의 연구결과와 비교 검토하였다.

Keywords

References

  1. J. of Hydraulic Eng. v.115 no.10 Scour-Depth Prediction under Armoring Conditions Borah,D.K.
  2. J. of Hydraulic Research v.15 no.3 Local Scour around Cylindrical Piers Breusers,H.N.C.(et al.)
  3. J. of Hydraulic Eng., ASCE v.110 no.9 Live-Bed Scour at Bridge Piers Melville,B.W.
  4. J. of Hydraulic Eng., ASCE v.114 no.10 Design Method for Local Scour at Bridge Piers Melville,B.W.;Sutherland,A.J.
  5. J. of Hydraulic Eng., ASCE v.112 no.1 Functional Trends of Scour at Bridge Piers Raudkivi,A.J.
  6. J. of Hydraulics Div., ASCE v.103 no.HY10 Effect of Sediment Gradation on Clear Water Scour Raudkivi,A.J.;Ettema,R.
  7. J. of Hydraulics Div., ASCE v.108 no.HY9 Stability of Armour Layers in Rivers Raudkivi,A.J.;Ettema,R.
  8. J. of Hydraulic Eng., ASCE v.109 no.3 Clear-Water Scour at Cylindrical Piers Raudkivi,A.J.;Ettema,R.
  9. J. of Hydraulic Eng., ASCE v.111 no.4 Scour at Cylindrical Bridge Piers in Armored Beds Raudkivi,A.J.;Ettema,R.
  10. J. of Hydraulics Div., ASCE v.95 no.HY6 Local Scour around Bridge Piers Shen,H.W.;Schneider,V.R.;Karaki,S.
  11. J. of Hydraulic Eng., ASCE v.109 no.4 Development and Prediction of Bed Armoring Shen,H.W.;Lu,J.Y.
  12. J. of Hydraulic Eng., ASCE v.117 no.10 Study of Time-Dependent Local Scour around Bridge Piers Yanmaz,A.M.;Altinbilek,H.D.
  13. 한국과학재단 보고서 하천교각의 세굴방지대책에 대한 실험적 연구 이정규