Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지
DOI QR코드

DOI QR Code

Field Test of Tunnel Lining Temperature Variation due to Heating Element Attached to Tunnel Lining Surface

터널라이닝 표면에 부착된 발열체로 인한 라이닝의 온도변화 현장실험

  • Received : 2019.02.28
  • Accepted : 2019.03.29
  • Published : 2019.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the cold region, the frozen damages in highway tunnels and regular road tunnels have widely been investigated and reported, but the measurement has not been sufficient made. The average temperature in cold region is below the zero, resulting in that the damage due to freezing at the entrance/exit of tunnel is more severe than in the middle of tunnel. In this study, a heating element was developed to prevent the tunnel lining from being frozen by enforcing to increase the temperature of tunnel lining. Then field tests using the developed heating element were performed and it was ensured that the temperature of tunnel lining increased after a certain time.

국내 한랭지역의 경우 고속도로터널 및 일반도로터널에서 발생하는 동결피해 사례는 조사 및 보고되고 있지만, 이에 대한 방안대책은 미흡한 상황이다. 한랭지역의 경우 영상권을 유지하는 다른 지역들과는 달리 평균온도가 영하로 떨어지는 지역이며, 동일지역 터널 내에서도 기온이 낮은 입출구에서 손상이 좀 더 발생하는 것으로 조사 되었다. 터널 라이닝의 온도저하를 방지하기 위하여 동절기에 라이닝의 온도를 강제로 상승시킬 수 있는 발열체를 제작하였다. 발열체는 실규모 터널의 라이닝에 부착하여 발열체의 열에 의한 터널 라이닝 주변의 온도변화를 측정하였다. 연구결과 발열체의 발열에 의해 라이닝의 온도상승 정도를 확인하였으며, 일정시간이 경과하면 라이닝의 온도상승이 수렴하는 것으로 나타났다. 이러한 결과를 활용하여 동절기 터널라이닝 및 배면의 동결피해를 줄일 수 있음을 확인하였다.

Keywords

HJHGC7_2019_v20n4_17_f0001.png 이미지

Fig. 1. Tunnel specifications

HJHGC7_2019_v20n4_17_f0002.png 이미지

Fig. 2. Concept diagram

HJHGC7_2019_v20n4_17_f0003.png 이미지

Fig. 3. Temperature variation at start point

HJHGC7_2019_v20n4_17_f0004.png 이미지

Fig. 4. Temperature variation at 1.5 m point

HJHGC7_2019_v20n4_17_f0005.png 이미지

Fig. 5. Temperature variation at 3 m point

HJHGC7_2019_v20n4_17_f0006.png 이미지

Fig. 6. Temperature variation with distance (sensor 2.5 cm)

HJHGC7_2019_v20n4_17_f0007.png 이미지

Fig. 7. Temperature variation with distance (sensor 5 cm)

HJHGC7_2019_v20n4_17_f0008.png 이미지

Fig. 8. Temperature variation with distance (sensor 7.5 cm)

Table 1. Characteristic of Carbon Nano Tube

HJHGC7_2019_v20n4_17_t0001.png 이미지

References

  1. 조경진 (2012), 탄소나노튜브의 용도별 활용현황 및 신소재화 가능성, KDB산업은행 미래전략연구소, pp. 49-61 (In Korean).
  2. An, J. W., Seo, J. E., Jung, M. H. and Seong, J. H. (2018), Classification of cold regions and analysis of the freeze-thaw repetition cycle based on heat transfer quantity by freezing test, Journal of Korean Tunnelling and Underground Space Association, Vol. 20, No. 6, pp. 957-972 (In Korean). https://doi.org/10.9711/KTAJ.2018.20.6.957
  3. 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 (In Korean). https://doi.org/10.14481/jkges.2017.18.1.5
  4. Jin, H. W. and Hwang, Y. C. (2017), A study on current extent of damage of road tunnel lining in cold regions (Gangwon-do), Journal of the Korean Geo-Environmental Society, Korean Geo-Environmental Society, Vol. 18, No. 1, pp. 49-58 (In Korean). https://doi.org/10.14481/jkges.2017.18.1.49
  5. Jun, K. J., Hwang, Y. C. and Yune, C. Y. (2017), Field measurement of temperature inside tunnel in winter in Gangwon Korea, Journal of the Cold Regions Science and Technology, Vol. 143, pp. 32-42. https://doi.org/10.1016/j.coldregions.2017.08.011
  6. Kim, D. G. (2018), Long-term performance of drainage system for leakage treatment of tunnel operating in cold region, Journal of Korean Tunnelling and Underground Space Association, Vol. 20, No. 6, pp. 1177-1192 (In Korean). https://doi.org/10.9711/KTAJ.2018.20.6.1177
  7. Zhang, S., Lai, Y., Zhang, X., Pu, Y. and Yu, W. (2004), Study on the damage propagation of surrounding rock from a cold-region tunnel under freeze-thaw cycle condition, Tunnelling and Underground Space Tchnology, Vol. 19, pp. 295-302. https://doi.org/10.1016/j.tust.2003.11.011