한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)

한국지반공학회 (Korean Geotechnical Society)
권호 표지

2-Arch 터널의 최적 설계에 관한 연구

Investigation on Optimum Design of 2-Arch Tunnel

  • 유충식 (성균관대학교 건설환경시스템공학과) ;
  • 김선빈 (성균관대학교 건설환경시스템공학과) ;
  • 김주미 (성균관대학교)
  • Yoo, Chung-Sik (Dept. of Civil Engineering, Univ. of Sungkyunkwan Univ.) ;
  • Kim, Sun-Bin (Dept. of Civil Engineering, Univ. of Sungkyunkwan Univ.) ;
  • Kim, Joo-Mi (Dept. of Civil Engineering, Univ. of Sungkyunkwan Univ.)
  • 발행 : 2008.10.10
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초록

This paper concerns optimum design of 2-Arch tunnel. A 2-Arch tunnel adopted in a subway tunnel construction site is considered in this study. A calibrated 3D finite element model was adopted to conduct a parametric study on the lagged distance between left and right tunnel faces. The results of analysis were examined to determine optimum lagged distance for minimizing the interaction between the left and right tunnels. The results indicated that the shotcrete lining stress and the center pillar load are more influenced by the second tunnel excavation than the tunnel deformation. Also shown is that a lagged distance of 20m is sufficient to minimize the interaction between two tunnels. Fundamental mechanism of 2-arch tunnel was also investigated based on the results.

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