한국지반환경공학회 논문집 (Journal of the Korean GEO-environmental Society)

한국지반환경공학회 (Korean Geo-Environmental Society)
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피복공법 적용 시 파랑에 의한 피복재 침식 실험 연구

Experimental Investigation on In-Situ Capping Erosion by Waves

  • Kong, Jin-Young (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Young-Taek (River and Coastal Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Ryu, Byung-Hyun (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Jangguen (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology)
  • 투고 : 2016.08.02
  • 심사 : 2016.09.23
  • 발행 : 2016.10.01
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초록

피복공법의 설계에서 피복재의 선정은 중요한 설계 변수로 파랑에너지로 발생하는 해저면 유속에도 피복재가 침식되지 않게 설계되어야 한다. 피복공법 관련된 기존 연구는 파랑에너지에 따른 깊이별 유속과 유효입경을 주로 시공경험과 수치해석에 의존하여 수행되었기 때문에 현장에서 시공경험이 미흡한 기술자가 사용하기에는 어려움이 예상된다. 본 연구에서는 파랑에너지에 따른 깊이별 유속과 피복재의 입경에 따른 침식을 판단할 수 있는 간편식을 제시하고 모형수조를 이용한 실내실험을 통해 신뢰성을 확인하고자 한다. 실내실험에서 측정된 깊이별 유속은 이론식과 상당히 일치하며, 유속추정 이론식을 침식 해석에 적용하여 유효입경을 예측하면 침식 유무 판단이 가능하다.

The determination of in-situ capping materials is one of the most important factors to design in-situ capping in order to protect capping materials from erosion. Previous studies have established relationship between the velocity induced by wave energy and effective diameter of sediments, but they are mostly empirical and numerical researches which is too complicated for field engineers to analyze the erosion of in-situ capping materials. This study provides simple analytical solutions and reliability based on hydraulic model test results. Experimental results show that measured flow velocities with respect to depth induced by wave energy are almost the same as estimated velocities and the erosion resistances of the different effective particle diameters can be estimated.

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참고문헌

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