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

Korean Geo-Environmental Society (한국지반환경공학회)
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Investigation on the Penetration Resistance of Suction Bucket Foundation in Sand using Model Test

모형실험을 통한 모래지반에서 석션버켓기초의 관입저항력 평가

  • Kim, Keunsoo (Coastal Development & Ocean Energy Research Division, Korea Institute of Ocean Science & Technology) ;
  • Kwon, Osoon (Coastal Development & Ocean Energy Research Division, Korea Institute of Ocean Science & Technology) ;
  • Oh, Myounghak (Coastal Development & Ocean Energy Research Division, Korea Institute of Ocean Science & Technology) ;
  • Jang, Insung (Coastal Development & Ocean Energy Research Division, Korea Institute of Ocean Science & Technology)
  • Received : 2014.03.28
  • Accepted : 2014.05.19
  • Published : 2014.06.01
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Abstract

Suction bucket foundation is installed with the differential pressure created by pumping water out of bucket. Bucket foundation has usually been utilized in mooring anchor for offshore platform or floating oil and gas production facilities in the open sea. After suction bucket foundation successfully was applied as the foundation for offshore wind turbines in Europe, it recently attracts much attention in Korea, too. To estimate the penetration resistance of the suction bucket foundation is one of the important matters that should be considered during its installation. This study carried out a series of model tests to investigate the penetration resistance of suction bucket foundation. And the mobilized soil strength factor was reviewed through comparing the experimental results by two installation ways (e.g., push-in-load and suction) and the results calculated by the conventional equation.

석션버켓기초는 펌프로 버켓 내부의 물을 외부로 배출할 때 발생한 압력차로 지반에 설치되는 기초이다. 버켓기초는 외해의 플랫폼이나 석유 가스 시추시설을 계류시키기 위한 앵커로 주로 사용되었으나, 최근 유럽을 중심으로 해상풍력발전의 기초로 적용되기 시작하면서 국내에서도 큰 관심을 받고 있다. 석션버켓기초의 관입저항력 산정은 석션버켓기초를 성공적으로 시공하기위해 고려해야 할 주요 사항 중의 하나이다. 본 연구는 석션버켓기초를 관입시킬 때 필요한 관입력을 평가하기 위해 실내모형실험을 수행하였다. 실내모형실험은 압입설치 및 석션설치에서 측정한 관입저항력을 관입성능평가에서 많이 사용되는 기존의 이론식과 비교하여 강도감소계수의 적절한 범위를 검토하였다.

Keywords

References

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