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

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Experimental Study for Downfall Pressure on the Floor behind Rubble-Mound Structure by Wave Overtopping: Non-Breaking Condition

월파에 의한 경사식구조물 배후면에 작용하는 낙하파압에 대한 실험적 연구: 비쇄파조건

  • Lee, Jong-In (Department of Civil Engineering, Chonnam National University) ;
  • Moon, Gang Il (Dept. of Marine and Civil Engineering, Chonnam National University) ;
  • Kim, Young Il (Department of Architecture and Civil Engineering, Chonnam National University)
  • 이종인 (전남대학교 공과대학 토목공학과) ;
  • 문강일 (전남대학교 공학대학 해양토목공학과) ;
  • 김영일 (전남대학교 대학원 건축토목공학과)
  • Received : 2022.03.15
  • Accepted : 2022.04.06
  • Published : 2022.04.30
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Abstract

The large uprush could be occurred when the waves hit the coastal structure and this uprush by wave could make the overtopping. The downfall of the wave overtopping water over the structure brought about the vertical impact loads. The vertical impact loads should be evaluated in order to design the pavement behind the crown wall however these loads were still unclear. In this study, the hydraulic model tests for the downfall impact loads by wave overtopping were performed and the various conditions were applied to the tests. The effect of the incident wave condition, the freeboard, the armour crest height and the height of the parapet were investigated. The test results showed that the parapet on the crown wall could reduce the wave overtopping however the inclusion of parapet could lead to the increased downfall wave pressures behind the crown wall. The empirical formulae were proposed for evaluating the maximum downfall pressures behind the crown wall of rubble mound structure.

파랑이 구조물과 만나게 되면 강한 처오름이 발생하게 되며, 이러한 처오름은 월파를 야기하게 된다. 월파에 의해 야기된 월파수괴에 의해 구조물 배후면에 강한 낙하파압이 작용하게 된다. 구조물 배후면의 포장체 등을 설계하기 위해서는 월파 등에 의한 낙하파압이 산정되어야 하지만 여전히 불명확한 부분이 있다. 본 연구에서는 경사식구조물을 대상으로 월파에 의한 낙하파압 계측을 위한 수리실험을 수행하였으며, 수리실험에서는 파랑조건, 여유고, 피복재 높이 및 파라펫의 유무에 따른 낙하파압의 변화를 계측하였다. 상치콘크리트에는 월파의 효과적인 저감을 위해 파라펫이 설치되기도 하지만, 파라펫 설치로 인해 배후면에 작용하는 낙하파압은 증가하는 것으로 검토되었다. 수행된 실험결과를 이용하여 경사식구조물의 상치콘트리트 배후면에 작용하는 최대 낙하파압을 산정할 수 있는 경험식을 제안하였다.

Keywords

Acknowledgement

본 논문은 해양수산부 및 해양수산과학기술진흥원의 연구비 지원(과제번호: 20180323)으로 수행된 연구이며, 연구비 지원에 감사드립니다.

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