DOI QR코드

DOI QR Code

A study on the selection of optimal cross section according to the ventilation system in TBM road tunnels

TBM 도로터널의 환기방식에 따른 최적단면 선정에 관한 연구

  • 이호근 ((주)비엔텍아이엔씨 기술기획실) ;
  • 강현욱 ((주)비엔텍아이엔씨 기술기획실) ;
  • 김현수 ((주)평화엔지니어링 지반공학부) ;
  • 김홍문 ((주)평화엔지니어링 지반공학부)
  • Received : 2013.03.13
  • Accepted : 2013.03.22
  • Published : 2013.03.28

Abstract

Recently, road tunnels have become longer and the plans for long and deep road tunnel have been underway in urban areas. These long and deep tunnel excavations include NATM and TBM. Shield TBM is applied to around 80% of traffic tunnels in Europe, and approximately 30% of them in other developed countries. However, as much of equipment is imported from foreign countries at high prices and distribution rate of TBM tunnel is considerably low in Korea, NATM excavation method is commonly used. To increase TBM tunnel, it is necessary to do assure economic feasibility with the supply-demand of TBM equipment. For this, the selection of standardized TBM diameter is urgently needed. Therefore, the study aims to estimate the standardized optimum section properties of TBM by examining TBM excavation cross section utilization depending on the volume of traffic, the number of lane and its cross-section type(single or double deck), and ventilation system.

최근 도로터널은 장대화되고 있으며 도심지 등의 장대 대심도 도로터널의 계획이 추진되고 있다. 이러한 장대, 대심도 터널 굴착공법은 NATM과 TBM 공법 등이 있으며 유럽에서는 약 80%, 기타 선진국에서도 약 30%의 교통터널에서 Shield TBM 공법을 적용하고 있다. 하지만 국내에서는 대부분의 장비가 외국에서 고가에 수입되고 있어 국내의 TBM 터널 보급률이 상당히 낮아 NATM 굴착방식이 보편적으로 적용되고 있는 실정이다. TBM 터널의 보급을 늘리기 위해서는 TBM 장비의 국내 수급을 통한 경제성의 확보가 필요하며 이를 위해 표준화된 TBM 구경의 선정이 시급한 실정이다. 따라서 본 연구에서는 도로터널의 표준화된 TBM 최적단면 선정을 위해 교통량에 따라 차로수의 규모 및 내부형상(단층 혹은 복층), 환기방식에 따른 TBM 굴착 내공단면을 활용 방안 등을 검토하여 최적 단면의 산출방안을 제시하고자 하였다.

Keywords

Acknowledgement

Grant : TBM 핵심 설계.부품기술 및 TBM터널의 최적 건설기술개발

Supported by : 국토해양부

References

  1. Kim, H.S., Kim, H.M. (2012), "A study on cross sectional characteristics and available area for using the lower space in TBM road tunnels", Korean Tunnelling and Underground Space Association, Vol. 14-2, pp. 141-157. https://doi.org/10.9711/KTAJ.2012.14.2.141
  2. Ministry of Land, Transport and Maritime Affairs (2009), "National standard of safety facilities installation and management for road tunnel", Korea.
  3. Ministry of Land, Transport and Maritime Affairs (2011), "Handbook of road design", Chapter 6. "Tunnel", Korea.
  4. Korea Expressway Corporation (2012), "Review the tunnel cross-section optimization method"
  5. Byun, S.H., Jeong, J.H., Jun, D.C., Shin, I.J., Sim, D.H. (2011), "A case study on M & E design for double-deck tunnel in urban area", TUNNEL & UNDERGROUND SPACE, Journal of Korean Society for Rock Mechanics, Vol. 21, No. 4, pp. 281-286.
  6. Yoo, Y.H., Kweon, O.S. (2010), "A study on the HRR and fire propagation phenomena for the safety design of deep road tunnel", Korean Tunnelling and Underground Space Association, Vol. 12-4, pp. 321-328.
  7. Lee, S.C., Kim, S.I. (2012), "The effect of grid number and the location and size of the fire source on the critical velocity in a road tunnel fire", Korean Tunnelling and Underground Space Association, Vol. 14-3, pp. 183-195. https://doi.org/10.9711/KTAJ.2012.14.3.183
  8. Korea Expressway Corporation (2006), "CFD analysis method on the selection of critical velocity on expressway tunnel".