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석션버켓을 기초로한 해양구조물의 시공(해상기상탑 및 해상풍력터빈)
곽대진(Kwag, Daejin),홍관영(Hong, Kwanyoung),이태환(Lee, Taehwan) 한국연안방재학회 2017 한국연안방재학회 학술발표대회 논문집 Vol.2017 No.-
최근 국내외로 해상풍력단지 개발이 확대되고 있는데, 국내의 경우 서남해와 제주도를 중심으로 해상기상탑과 해상풍력터빈이 다수 설치되고 있다. 특히 기초 내외부의 수압차를 이용하여 무소음, 무진동으로 기초를 관입하는 개념의 석션버켓 기초는 해상공사의 경제성과 친환경성 측면에서 주목 받으면서 해상기상탑과 해상풍력터빈에 적용을 점차 확대해 나가고 있다.
이주형(Ju-Hyung Lee),곽대진(Daejin Kwag) 한국해양공학회 2014 韓國海洋工學會誌 Vol.28 No.5
For site verification, a prototype GFRP suction pile was produced, and a field test was performed in the field. The prototype hada diameter of 1.8 m and height of 3.0 m. To reduce the penetration resistance and buckling, the tip was reinforced with steel. The test-bed was located international water near the An-ma islands in the West Sea of Korea. The target layer was sedimented sand with SPT N-values of 20~40. The test-bed application showed a self-weight penetration of 0.5 m and a final penetration induced by suction of 2.2 m, which indicated that 96% of its entirebody was successfully penetrated. After penetrating the GFRP suction pile, a diver confirmed the good penetration. Averticality of 1.6° satisfied the criterion of 2.0°. For effective site installation, the site condition (depth, ground condition, etc.) had to be considered carefully to select the suction pressure to apply. The hybrid suction foundations were the group type. Thus, the seafloor condition, waves, and tidal current affected the caisson installation process (e.g., pile installation sequence, suction pressure, and amount of penetration). Therefore, further studies are required to improve the reliability and efficiency.