Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Effect of Segment thickness during Shield TBM tunnelling in case study

쉴드TBM 추진시 세그먼트 두께영향에 대한 현장사례연구

  • Received : 2013.05.01
  • Accepted : 2013.05.27
  • Published : 2013.05.31
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Abstract

This paper presents the effect of Segment thickness during Shield TBM tunnelling in case study. In order to perform this study, the ground condition developed in the investigation site are reviewed and analysed. It is also carried out the construction problems occurred in the site during Shield TBM tunnelling. Several Segments were broken partially during advance tunnel by jacking pressure. The data surveyed from site are analysed in order to investigate the cause of Segment break. The numerical and analytical evaluations are carried out to examine the effect of Segment behaviour. From the results, it is found that the main causes of Segment break may be the jacking system and Segment thickness. In addition, new jacking technique is suggested to install safely the Segment during advance tunnel by jacking.

이 논문은 쉴드TBM 추진시 잭킹 force에 의한 세그먼트 두께의 영향에 대한 현장사례연구이다. 이 연구를 위하여 조사현장의 지반 특성에 대하여 분석하고 현장 조사 자료를 통한 쉴드TBM공사시 문제점에 대하여 분석하였다. 실질적으로 잭킹에 의한 터널 추진시 세그먼트가 부분적으로 파손된 것으로 추측되었다. 이에 따라 세그먼트의 파손에 대하여 조사하였으며, 파손 원인에 대하여 다각적으로 수치 해석적 및 이론적으로 평가를 실시하였다. 결과로부터 파손의 주원인들은 잭킹 시스템과 세그먼트의 두께가 얇은데 있다는 것으로 추측되었다. 추가로 연구 결과를 근거로 향후 얇은 세그먼트의 안전한 설치를 위한 추진 잭킹 방법에 대하여서도 제안하였다.

Keywords

References

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