초록

본 연구과제의 1세부과제 “천해용 대구경 모노파일 시공시스템 개발”에서는 1) 대구 경 해상 모노파일 설계기술 개발, 2) 대구경 해상 모노파일 시공기술 개발，3) 대구 경 모노파일 굴착 시공장비 개발, 4) 대구경 해상 모노파일 테스트베드 실증에 대한 연구를 수행하였으며, 2세부과제 “대수심 버켓기초 시공시스템 개발”에서는 1) 석션 버켓기초 설계기술 개발，2) 대수심 석션버켓기초 시공기술 개발, 3) 석션버켓기초 실증에 대한 연구를 수행하였음.

Abstract ▼

IV. Results

■ Development of the large diameter monopile construction system for shallow sea(Subsection 1)

In this study, monopile design, excavation equipment, construction, field test, monotoring system were proposed for shallow sea at a depth of 30m, and the research for large diame

IV. Results

■ Development of the large diameter monopile construction system for shallow sea(Subsection 1)

In this study, monopile design, excavation equipment, construction, field test, monotoring system were proposed for shallow sea at a depth of 30m, and the research for large diameter monopile as one of the most economical foundations for offshore wind turbine was carried out. In design of monopile, the principle corresponding to ISO 19902 was developed, and a 5m large diameter monopile was designed for rock site condition. In construction of monopile, information management system for marine geological features, construction of transition piece connecting between monopile and tower structure, high quality grouting method, process management model, monitoring system, and operation system for marine equipments are developed. Reverse Circulation Multi Hammers(RCMH) and Vertical Shaft Boring Machine(VSBM) which operate with three times faster excavation speed than RCD and the verticality of 1/300 were developed and verified on the land.

■ Development of bucket foundation construction system for deep sea(Subsection 2)

In this study, monopod and tripod suction bucket foundations for offshore wind foundation at hard ground condition were proposed and design method based on the identification of penetration mechanism and bearing capacity were established. In order to improve the construction technology, selection and application of suction pumps were identified and enhanced suction pump was developed And then, verticality control below 1 degree was achieved in the field condition. The developed tripod suction bucket foundation system was applied to the foundation of met mast, Ocean Mast-1. The whole process including design, construction measurement and maintenance control of developed technology in this study were demonstrated in the offshore field site. In addition, tripod suction bucket foundation was applied to HeMOSU-2 met mast where the water depth is 33m. Through such field applications, we procure the design and construction technology of suction bucket foundation.