Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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A Case Study of Nitrox Usage in Diving Operation of the Busan-Geoje Fixed Link Immersed Tunnel

거가대교 침매터널 잠수작업에서의 나이트록스 사용 사례 분석

  • Woo, Dae-Hee (Department of Maritime Management Technology, Ocean Science and Technology School, Korea Maritime and Ocean University) ;
  • Kang, Sin-Young (Department of Maritime Management Technology, Ocean Science and Technology School, Korea Maritime and Ocean University) ;
  • Lee, Min-Gu (Department of Maritime Management Technology, Ocean Science and Technology School, Korea Maritime and Ocean University)
  • 우대희 (한국해양대학교 해양과학기술전문대학원 해양관리기술학과) ;
  • 강신영 (한국해양대학교 해양과학기술전문대학원 해양관리기술학과) ;
  • 이민구 (한국해양대학교 해양과학기술전문대학원 해양관리기술학과)
  • Received : 2015.09.25
  • Accepted : 2015.12.28
  • Published : 2015.12.31
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Abstract

This study tried to evaluate the safety and economical benefit of Nitrox-diving by comparing with Air diving. We used actual diving data which was recorded in construction site of the Busan-Geoje fixed link immersed tunnel in 2010. The study method was to assort and analyze the diving data by divers, depth, breathing air, and diving table. Furthermore, the study examined the possibility of outbreak decompression sickness by comparing Nitrox diving and Air diving in no-decompression limit time, decompression time, working time. As a result, this study confirms that if certain diver breathe Nitrox for diving and oxygen for decompression, not only the risk of decompression sickness could be minimized, but also duration of decompression could be shortened. Moreover, it was estimated that a remarkable difference(more than 3 times) between actual duration of underwater construction period and virtual construction period by using air. As a result, the study confirmed that Nitrox diving is more efficient and economical than Air diving in physically limited and hazardous diving environment.

본 연구는 나이트록스 잠수와 공기 잠수를 비교하여 잠수작업에서의 안전성 및 경제성 평가를 시도하였다. 연구를 위해서 2010년 거가대교 침매터널 건설시 사용되었던 실제 잠수자료를 사용하였으며, 감압병 발생율, 작업시간, 감압시간 등 두 기체 다이빙의 특징을 분석하였다. 그 결과 잠수사가 호흡기체로 나이트록스를 사용하고 감압기체로 100% 산소를 사용한다면 감압병 발생확률을 최소화 할 수 있으며 감압기간 또한 크게 단축할 수 있음을 확인하였다. 그리고 실제 나이트록스를 사용한 공사기간과 공기 잠수를 하였을 경우의 가상의 공사기간을 비교해 본 결과 최대 3배의 공사기간 단축 효과를 가져왔음을 확인하였다. 결론적으로 시간적, 육체적으로 제한되어있는 환경에서 잠수 시 나이트록스 잠수가 공기 잠수보다 능률적이고 경제적임을 확인하였다.

Keywords

References

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