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Concrete Lining Behaviors of Subway Tunnels according to Temperature Variations

온도변화에 따른 지하철 터널의 콘크리트 라이닝 거동

  • Yoo, Ji-Hyeung (School of Construction Engineering, Kyungil University) ;
  • Lee, Seung-Won (Department of Construction and Environmental Design, Kyungbok University) ;
  • Kim, Dae-Sung (School of Construction Engineering, Kyungil University)
  • Received : 2014.09.04
  • Accepted : 2014.09.27
  • Published : 2014.12.31

Abstract

In this study, the behavior of urban subway tunnels is measured using instrumentation sensors installed in the lining concrete inside subway tunnels in order to analyze their behavior according to temperature variations. It is observed that the stresses of the concrete lining, tunnel convergence, and cracks change according to the temperature variations. However, the crack deformation differs depending on the size and status of the crack. In addition, this study proposes a correction formula for the lining stress and tunnel convergence through numerical analyses of the concrete lining according to the temperature variations. The results of this research can be used in the tunnel maintenance considering the tunnel behavior depending on the temperature variations in the tunnel.

본 연구에서는 도심지 지하철 터널의 콘크리트 라이닝에 계측센서를 설치하여 터널 내부의 온도변화에 따른 콘크리트 라이닝의 거동을 분석하였다. 계측결과, 터널 내부의 온도변화에 따라 콘크리트 라이닝의 응력과 내공변위, 균열이 변화하는 것을 알 수 있었다. 특히 균열의 경우, 온도변화에 따라 수축과 팽창이 이루어지고 있으나 균열의 크기와 상태에 따라 변화의 폭이 다른 것으로 나타났다. 또한 온도변화에 따른 콘크리트 라이닝의 수치해석을 통하여 터널 내부 온도변화에 따른 콘크리트 라이닝 응력과 내공변위의 보정식을 제안하였다. 본 연구 결과는 도심지 지하철 터널 내부의 온도변화에 따른 거동 파악 및 온도변화를 고려한 터널의 유지관리에 크게 활용될 것이다.

Keywords

References

  1. S.W. Lee, J.H. Yoo, D.S. Kim, M.G. Kang (2012) Behavior measurement according to the temperature variation inside the urban subway tunnel, 2012 Fall Conference of Korean Society for Railway, pp. 1096-1101.
  2. DOOSAN E&C (2012) Dongdaegu station bridge repair exchange and extension construction urban rail 1st tunnel measurement report, Daegu metropolitan city.
  3. J.T. Woo (2008) Construction Measurement Engineering, Goomibook, Seoul, pp. 760-763.
  4. J.T. Woo, S. Lee (2002) The mechanical characteristics of subway tunnel for maintenance monitoring, Journal of Korea Society of Civil Engineering, 22(1), pp. 89-97.