Key block analysis method for observational design and construction method in tunnels

터널의 정보화 설계시공을 위한 키블럭 해석기법

  • 황재윤 (부산광역시의회 정책연구실)
  • Received : 2010.05.07
  • Accepted : 2010.05.28
  • Published : 2010.05.31

Abstract

Recently, the observational design and construction method in tunnels has been becoming important. Rock masses include various discontinuities such as joints, faults, fractures, bedding planes, and, cracks. The behavior of tunnels in hard rocks, therefore, is generally controlled by various discontinuities. In this study, a new key block analysis method for observational design and construction method in tunnels is proposed, and then applied to the actual tunnel with a super-large cross-section. The proposed analysis method considers finite persistence of discontinuities. The new analysis method can handle concave and convex shaped blocks. To demonstrate the applicability of this key block analysis method for observational design and construction method in tunnels, the analysis results are examined and compared with those of the conventional method.

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