Stability analysis of a 2 arch tunnel considering excavation sequence

Kwang-Ho You; Yeon-Jun Park

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2002 Vol.4, Issue 2 Preview Page

Stability analysis of a 2 arch tunnel considering excavation sequence 굴착단계를 고려한 2 아치 터널의 안정성 해석

30 June 2002. pp. 167-174

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Abstract

In this study, a numerical stability analysis was performed for a large tunnel considering excavation sequence. In most cases, stability of a tunnel is analyzed based on the stability of the final excavation stage only. In this study, stability analysis of a tunnel was performed at each excavation stage. In summary, it can be inferred that there is no problem in stability of the tunnel. However, thorough and careful measurements are recommended. Also, it is found that the stability of the tunnel at the 5th excavation stage when the right half of the main tunnel is excavated is rather lower than that of the tunnel at the final excavation stage.

Keywords

Excavation sequence

2 arch tunnels

stability analysis

본 연구에서는 시공순서를 고려한 대단면 터널의 안정성 평가를 수치해석에 의해 수행하였다. 일반적으로 터널의 안정성은 최종 굴착 후의 안정성에 의해 판단하는 것이 보통이나, 본 연구에서는 굴착단계별 안정성을 비교․검토하였다. 해석결과를 종합하면, 터널의 안정성에는 별 문제가 없을 것으로 판단되며, 이곳을 시공할 때 계측을 철저히 하는 등의 각별한 주의가 요구된다. 또한, 굴착단계별 안정성을 비교한 결과, 우측 본선터널 상부 반단면 굴착시 (5 단계)의 안정성이 오히려 최종굴착 후의 안정성보다 취약한 것으로 나타났다.

키워드

단계별 굴착

2 아치 터널

안정성 해석

References

(주)대신구조엔지니어링 (2001), 지반조사보고서 석수동 도시계획도로 (중로1-54, 55호선) 개설공사.

Itasca Consulting Group, Inc. (1999) FLAC, Fast Lagrangian Analysis of Continua, Version 3.4,

Marc Vandewalle (1997), Tunnelling the world, 5th Edition, N. V. Bekaert S. A., p93.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 4
No :2
Pages :167-174

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

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