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Research Article

Scour Characteristics of Artificial Reef through Experiment and Numerical Analysis

실내실험 및 수치해석을 이용한 인공어초 세굴 거동 특성 연구

Daeho Yun1
,
Yuntae Kim2*
윤 대호1
,
김 윤태2*
1Member, Graduated student, Department of Ocean engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, Republic of Korea
2Member, Professor, Department of Ocean Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, Republic of Korea
* Corresponding Author
30 September 2019. pp. 23-32
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Abstract

본 연구에서는 실내실험 및 수치해석을 통해 무보강 및 보강 조건에 따른 인공어초의 세굴 특성을 알아보았다. 해저 지반 보강재로는 지오그리드(geogrid)를 이용하였으며, 보강 면적은 인공어초 하부 면적 대비 1배, 3배 및 5배와 같이 다양한 배율로 적용하였다. 2차원 흐름 수조 실험을 통해 모래 및 실트 지반에서 인공어초의 세굴 패턴을 알아보았으며, 실내실험과 동일한 조건으로 수치해석을 수행하여 유속 벡터 분포 및 세굴 패턴을 알아보았다. 실내실험과 수치해석을 비교한 결과 세굴 패턴은 전반적으로 유사한 경향을 띄었으며, 무보강 지반보다 보강재를 설치한 인공어초 지반에서 세굴이 감소하는 것으로 나타났다.

This study investigated the scour characteristics of artificial reef according to unreinforced and reinforced artificial reefs through laboratory test and numerical analysis. In this study, geogrid was used as a reinforcement of seabed. Three different reinforced areas were selected; one time, three times and five times bottom area of artificial reef. Two-dimensional water channel test was carried out to investigate scour patten of sand and silt grounds. Numerical analysis was also performed to see the velocity vector and scouring patten around artificial reef which was same condition with experiment. The numerical results were in good agreements with the experimental test results. It was found that the geogrid-installed soft ground under artificial reef tends to reduce scour, compared to unreinforced soft ground.

Keywords
Artificial reef
Scour
Reinforced ground
Velocity field

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 18
  • No :3
  • Pages :23-32
  • Received Date : 2019-07-30
  • Revised Date : 2019-09-01
  • Accepted Date : 2019-09-16
  • DOI :https://doi.org/10.12814/jkgss.2019.18.3.023
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