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2019 Vol.21, Issue 6 Preview Page

Research Paper

A study on the operation characteristics of oversized exhaust port applicable to double-deck tunnel

복층터널에 적용 가능한 화재 연동형 대배기구 운영 특성 분석 연구

Jinouk Park1
,
Yongho Yoo2*
,
Yangkyun Kim3
,
Byoungjik Park4
,
Whiseong Kim5
박 진욱1
,
유 용호2*
,
김 양균3
,
박 병직4
,
김 휘성5
1Research Specialist, Fire Research Institute, Korea Institute of Civil Engineering and Building Technology
2Research Fellow, Fire Research Institute, Korea Institute of Civil Engineering and Building Technology
3Senior Researcher, Fire Research Institute, Korea Institute of Civil Engineering and Building Technology
4Research Specialist, Fire Research Institute, Korea Institute of Civil Engineering and Building Technology
5Assistant Technician, Fire Research Institute, Korea Institute of Civil Engineering and Building Technology
1비회원, 한국건설기술연구원 화재안전연구소 전임연구원
2정회원, 한국건설기술연구원 화재안전연구소 연구위원
3정회원, 한국건설기술연구원 화재안전연구소 수석연구원
4비회원, 한국건설기술연구원 화재안전연구소 전임연구원
5비회원, 한국건설기술연구원 화재안전연구소 주임주무원
* Corresponding Author
30 November 2019. pp. 887-895
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Abstract

Recently, the number of underground road development projects has been increasing to solve traffic problems in the national capital region and metropolitan areas with intensified overcrowding, and there has been a tendency to plan underground roads by applying a double-deck tunnel technology that has advantages in constructability and economical efficiency. The double-deck tunnel has a structure where one excavation section is divided into two parts and used as up and down lines, and is mainly used as a road for small vehicles only due to its low floor height. In addition, due to the small cross-sectional area, it has characteristics different from those of general road tunnels in terms of ventilation and disaster prevention. In this regard, this study proposed an operational plan that applies an oversized exhaust system, which is one of semi-transverse ventilation systems, to small cross-sectional tunnels like double-deck tunnel with low floor height, and a comparative analysis between smoke exhaust characteristics according to the fire occurrence locations and oversized exhaust systems was conducted using the Fire Dynamics Simulator (FDS). The results showed that unlike uniform exhaust, intensive smoke exhaust using the oversized exhaust port maximized the delay effect of smoke diffusion and limited the smoke within 50 m above and below the fire point.

Keywords
Double deck-tunnel
Semi-transverse ventilation system
Oversized exhaust port
Local smoke control
Smoke exhaust

인구 초과밀화 현상이 심해지고 있는 국내 수도권 및 대도시에서 발생되고 있는 교통문제 해결을 위해 지하도로 개발 사업이 늘어나고 있으며, 시공성과 경제성의 이점을 가지는 복층터널 기술을 적용하여 다수의 지하도로를 계획하고 있는 추세이다. 복층터널은 하나의 굴착단면을 두 개로 나눠 상하행선으로 사용하는 방식으로 대부분 층고가 낮아 소형차량 전용도로로 사용되고 있는 실정이다. 또한, 이러한 소단면 특성으로 인해 환기 및 방재 측면에서도 일반 도로터널과 상이한 특성을 가지게 된다. 본 연구에서는 복층터널과 같이 층고가 낮은 소단면 터널에 반횡류식 환기방식의 하나인 대배기구 방식을 적용한 운영안을 제시하고 FDS 시뮬레이션을 통해 화재발생 위치와 대배기구 배연 방식 등에 따른 배연 특성을 비교하여 분석하였다. 그 결과 균일배기와 달리 대배기구를 이용하여 집중배연시 연기의 확산지연 효과가 최대화 되고 연기가 화재지점 상하류 50 m안에 제한시킬 수 있었다.

키워드
복층터널
반횡류 환기 시설
대배기구
국부제연
배연
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 21
  • No :6
  • Pages :887-895
  • Received Date : 2019-09-27
  • Revised Date : 2019-10-17
  • Accepted Date : 2019-10-19
  • DOI :https://doi.org/10.9711/KTAJ.2019.21.6.887
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