Model Test and Numerical Analysis for Failure Behaviour of Shallow Tunnel Considering Unsupported Tunnel Length

굴진장을 고려한 얕은 터널파괴거동에 대한 모형실험 및 수치해석

  • 김영민 (전주대학교 토목환경공학과)
  • Published : 2005.12.01

Abstract

During excavation of shallow tunnels in soft ground, failure mechanism around the tunnel face have major influence on the stability of tunnels. In this paper, a series of laboratory tests under plane strain condition on the small scale of a shallow tunnel considering unsupported tunnel length has been performed. The results have shown that tunnel failure mechanism changes from failure mode 1 to failure mode 2 as unsupported tunnel length increases. By comparing the experimental and the numerical results, the loosening pressure for the shallow tunnel and progressive failure have been investigated.

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