Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Analysis on Freezing Reduction of Road Tunnels with Heat Insulation Method during Winter

단열공법이 적용된 겨울철 도로터널의 동결저감 효과 분석

  • 손희수 (강릉원주대학교 토목공학과) ;
  • 전경재 (강릉원주대학교 토목공학과) ;
  • 윤찬영 (강릉원주대학교 토목공학과)
  • Received : 2017.07.10
  • Accepted : 2017.08.08
  • Published : 2017.08.31
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Abstract

Gangwon province which is located in northeast of Korea is the coldest region where average daily temperature is below zero during winter while the other regions are above zero. However, there have been insufficient researches on the insulation design and the effect of the insulation on the freezing damages, even though freezing damages were reported consistently in the lining of road tunnel during winter. In this study, to investigate the effect of insulations on the reduction of freezing damages, numerical analysis was performed considering geotechnical and meteorological characteristics in Gangwon province during winter. As a result, it was found that thickness of concrete and shotcrete in lining had negligible effect on the freezing depth while the insulation had significant effect on it. In addition, because the freezing depth is greatly affected by the thermal conductivity of the ground behind the lining in the period of cold weather, these effects should be considered in the estimation of the insulation thickness.

우리나라 북동부에 위치하고 있는 강원지역은 겨울철 일 평균온도가 영상권을 유지하는 타 지역들과는 달리 일평균온도가 영하로 떨어지는 가장 추운 지역이다. 이에따라 지속적으로 도로터널의 라이닝부에 대한 동결피해 발생 사례가 보고되고 있으나 동결피해 저감을 위한 단열설계 기준 및 관련 연구는 아직까지 매우 부족하다. 본 연구에서는 단열공법 적용에 따른 도로터널의 동결저감 효과를 분석하기 위하여 겨울철 강원지역 도로터널의 지반특성과 기후특성을 고려한 해석적 연구를 수행하였다. 그 결과, 라이닝부의 콘크리트와 숏크리트 두께의 차이는 동결심도에 큰 영향을 미치지 않는 것으로 나타났으나 단열재의 적용 시에는 동결심도가 크게 감소하는 것으로 나타났다. 또한 배면지반의 열전도율과 외기온도 지속지간의 변화에 따라서 동결심도가 큰 영향을 받으므로 이러한 영향을 고려하여 단열재의 두께를 산정하여 적용한다면 우수한 동결저감 효과를 보일 것으로 판단된다.

Keywords

References

  1. Broch, E., Grov, E., and Davik, K. I. (2002), "The Inner Lining System in Norwegian Traffic Tunnels", Tunnelling and Underground Space Technology, Vol.17, No.3, pp.305-314. https://doi.org/10.1016/S0886-7798(02)00026-3
  2. Hangil Engineering Co., Ltd. (2015), Comprehensive report of precision safety inspection service, National highway No. 38, Dumundongjae tunnel No. 2, Jeongseon Office of Construction Management.
  3. Hwang, Y. C. (2013), "Maintenance Characteristics of Geotechnical Structures in Cold Region for Freeze Damage Analysis", Journal of the Korean Geo-Environmental Society, Vol.14 No.3, pp.35-40.
  4. Inokuma, A. and Inano, S. (1996), "Road Tunnels in Japan: Deterioration and Countermeasures", Tunnelling and Underground Space Technology, Vol.11, No.3, pp.305-309. https://doi.org/10.1016/0886-7798(96)00026-0
  5. ITA Working Group on Maintenance and Repair of Underground Structures (1991), "Report on the Damaging Effects of Water on Tunnels During Their Working Life", Tunnelling and Underground Space Technology, Vol.6, No.1, pp.11-76. https://doi.org/10.1016/0886-7798(91)90005-O
  6. Jin, H. W., Kim, T. S., and Hwang, Y. C. (2017), "Analysis of Temperature Change of Tunnel Lining with Heating Element", Journal of the Korean Geo-Environmental Society, Vol.18, No.1, pp.5-12. https://doi.org/10.14481/jkges.2017.18.1.5
  7. Kim, D. Y. and Lee, Y. N. (2005), "Countermeasures for Frost Protection of Tunnel Lining, KSCE National Conference", KSCE, Jeju, Korea, pp.2674-3677.
  8. Kim, D. Y., Lee, H. S., and Sim, B. K. (2011), "A Study on the Design of Tunnel Lining Insulation based on Measurement of Temperature in Tunnel", Korean Tunnelling and Underground Space Association, Vol.13, No.4, pp.319-345.
  9. Kim, J. M., Shin, H. S., Min, T. K., and Kim, Y. T. (2012), "Numerical Analysis of Reinforced Slopes Stability with Rainfall", Journal of the Korean Geo-Environmental Society Conference, KGES, Seoul, pp.207-213.
  10. Kim, S. O., Suh, M. S., and Kwak, C. H. (2005), "Climatological Characteristics in the Variation of Soil Temperature in Korea", Journal of Korean Earth Science Society, Vol.26 No.1, pp.93-105.
  11. Kwon, O. I., Baek, Y., Koo, H. B., and Bae, K. J. (2005), "Analysis on the Geotechnical Characteristics of Slopes around Tunnel Entrance in National Road of Korea", The Korean Society of Engineering Geology Conference, KSEG, pp.123-128.
  12. Ministry of Land, Infrastructure and Transport (MOLIT) (2016), Road Bridge and Tunnel Inspection Report.
  13. Ministry of Land, Infrastructure and Transport (MOLIT) (2000), Road Design Manual I, Vol. 6 Tunnel.
  14. Park, J. M., Kim, H. C., Lee, Y. M., Shim, B. O., and Song, M. Y. (2009), "Thermal Properties of Rocks in the Republic of Korea", The Korean Society of Economic and Environmental Geology, Vol.42, No.6, pp.596-598.
  15. Shin, K. Y., Chung, M., Kim, S. B., and Kim, J. C. (1998), "Measured Data of Thermophysical Properties of Concrete for a Temperature Range of $20^{\circ}C\;to\;1000^{\circ}C$", Transactions of the Korean Society of Mechanical Engineers - B, Vol.22, No.5, pp.596-606. https://doi.org/10.22634/KSME-B.1998.22.5.596
  16. Son, H. S., Jun, K. J., and Yune, C. Y. (2017), "Numerical Analysis of Frost Depth behind the Lining of Road Tunnel in Gangwon Province", Journal of the Korean Geo-Environmental Society, Vol.18, No.3, pp.15-23.