Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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A Fundamental Study to Estimate Construction Performance of Subsea Waterjet Trenching Machine

해저지반 굴삭용 워터젯 장비의 시공성능 추정에 관한 기초적 연구

  • Na, Kyoung-Won (Ocean Science and Technology School, Korea Maritime and Ocean University) ;
  • Beak, Dong-Il (Department of Civil Engineering, Korea Maritime and Ocean University) ;
  • Hwang, Jae-Hyuk (Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University) ;
  • Han, Sung-Hoon (Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University) ;
  • Jang, Min-Suk (Ocean Science and Technology School, Korea Maritime and Ocean University) ;
  • Kim, Jae-Heui (Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University) ;
  • Jo, Hyo-Jae (Division of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University)
  • 나경원 (한국해양대학교 해양과학기술전문대학원) ;
  • 백동일 (한국해양대학교 건설공학과) ;
  • 황재혁 (한국해양대학교 조선해양시스템공학과) ;
  • 한성훈 (한국해양대학교 조선해양시스템공학과) ;
  • 장민석 (한국해양대학교 해양과학기술전문대학원) ;
  • 김재희 (한국해양대학교 조선해양시스템공학과) ;
  • 조효제 (한국해양대학교 조선해양시스템공학과)
  • Received : 2015.09.08
  • Accepted : 2015.12.28
  • Published : 2015.12.31
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Abstract

There is drift toward moving offshore structures operating sites to deep water that brings subsea systems and types of apparatus to meet more severe environment than onshore. At this moment, climatic condition and seabed state affect trenching efficiency so trenching process is need to make steady progress in a short time. This paper is research on estimation about construction performance of waterjet trenching machine mounted on ROV trencher. Optimal number of nozzles that can maximize trenching efficiency is selected by considering clearance and angle of nozzles through CFD. Then verified effectiveness of waterjet apparatus on the result of trenching depth and velocity by model test analogized performance for construction work of waterjet trenching machine.

해양구조물의 가동해역이 대수심으로 이동함에 따라 해저파이프라인 및 해저케이블은 육지보다 열악한 시공 환경에 놓이게 된다. 이때 해저지반상태와 해상조건 등은 작업효율에 영향을 미치게 되며 단시간에 효율적인 시공이 필요하다. 본 논문은 해저지반 굴삭을 위해 ROV(Remotely Operated Vehicle) 트렌쳐에 장착되는 워터젯 굴삭기의 시공성능 추정에 관한 연구이다. 먼저 전산유체해석을 통해 노즐간의 거리와 노즐 분사각도를 고려하여 굴삭효율을 극대화할 수 있는 최적 노즐수량을 선정하였고, 모형실험을 수행하여 굴삭기의 시공성능을 유추할 수 있는 최대 굴삭심도와 최대 굴삭속도를 파악하였다. 이를 토대로 실제 운용중인 워터젯 굴삭장비와 비교분석하여 워터젯 장비의 효율성을 확인하였다.

Keywords

References

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