KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Evaluation of Reducing Cross Section of the Partial Drainage Shield Tunnel Segment using the Model Experiments

축소모형실험을 통한 부분배수 쉴드터널의 세그먼트 단면 축소 가능성 평가

  • 마상준 (한국건설기술연구원 지반연구소) ;
  • 이영섭 (한국건설기술연구원 지반연구소) ;
  • 김동민 (한국건설기술연구원 지반연구소)
  • Received : 2014.03.03
  • Accepted : 2015.02.06
  • Published : 2015.04.01
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Abstract

The existing shield tunnel has constructed in the concept of non-drainage uniformly, but the leak has become a problem in the construction and management. The Shield tunnel design allowed for the water and earth pressure bring about the increasing segment thickness and the construction costs. In order to improve these problems, the study of the partial drainage shield tunnel is in progress. In this study, th model experiment was performed to confirm the possibility of the partial drainage shield tunnel. And the water and earth pressure was measured in drainage and undrained condition. Based on the results of model experiments, the effect of water pressure reduction was confirmed by reviewed the structure stability of the real design case.

기존 쉴드터널은 일률적으로 비배수 개념이 적용되고 있지만 시공 및 운영 과정에서 고질적인 누수 발생이 문제가 되고 있으며, 쉴드 세그먼트의 경우 토압 및 수압까지 고려한 설계로 인해 단면이 과다하게 증가되고 세그먼트 재료비 상승을 유발하고 있다. 이러한 문제점들을 개선하기 위해 쉴드터널에 배수 개념을 적용한 부분배수형 쉴드터널에 대한 연구가 진행되고 있다. 본 연구에서는 부분배수 쉴드터널의 적용 가능성을 평가하기 위해 축소모형실험을 통해 배수 및 비배수 조건에서의 토압 및 수압 변화를 측정하였다. 실험 결과를 통해 도출된 수압 저감 효과를 바탕으로 지하수위 아래 위치한 쉴드터널 설계사례에 적용하여 구조 안정성을 검토하였고, 수압 저감을 통한 세그먼트 단면 축소 효과에 대해 평가하였다.

Keywords

References

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