Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Characteristics of Wave by Additional Installation of Porous Dual Circular Caissons on the Existing Breakwater

기존 방파제에 투과성 이중 원형케이슨 추가설치에 따른 파랑 특성 분석

  • Park, Min Su (Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology)
  • 박민수 (한국건설기술연구원 인프라안전연구본부)
  • Received : 2020.10.20
  • Accepted : 2020.11.12
  • Published : 2020.12.31
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Abstract

The design and the construction are carried out by installation of new caissons on the back or the front of existing caissons to increase the stability of existing caisson breakwater. In this study, we use the eigenfunction expansion method to analyze the effects of wave structure interaction when new porous dual circular caissons are installed on the back or the front of existing breakwater. The porous dual circular caisson which consisting of a porous outer cylinder circumscribing an impermeable inner cylinder is one type of seawater exchanging breakwater. The comparison of numerical results between present method and Sankarbabu et al. is made, and the wave force and the wave run-up acting on each porous dual circular caisson are calculated for various parameters by considering the wave structure interaction.

기존 케이슨방파제의 안정성을 높이기 위해 케이슨 전면 또는 후면에 추가로 신규 케이슨을 설치하여 보강하는 설계 및 시공사례가 발생되고 있다. 본 연구에서는 기존 방파제 전면 또는 후면에 신규 투과성 이중 원형케이슨이 추가 설치될 경우 파와 구조물간의 상호작용 영향을 분석하기 위해 고유함수전개법을 이용하여 수치해석을 수행하였다. 투과성 이중 원형케이슨은 해수교환 방파제로 내부는 불투과성 원형실린더로 외부는 일정한 공극률을 가진 투과성 원형실린더로 제작된다. 수치해석의 신뢰성을 확보하기 위해 Sankarbabu et al.의 수치 해석결과와 비교를 수행하였으며, 추가로 설치되는 투과성 이중 원형케이슨의 다양한 변수에 따른 개별 원형케이슨에 작용하는 파력 및 파처오름 특성을 분석하였다.

Keywords

Acknowledgement

본 연구는 해양수산과학기술진흥원의 안전한 항만 구축 및 관리기술 개발사업인 "재해안전항만 구축 기술개발(20180323)" 과제를 통해 수행된 연구결과 중 일부임을 밝히며, 연구비 지원에 감사드립니다.

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