APPROXIMATE TIME-DEPENDENT ANALYSIS OF TUNNEL SUPPORT STRUCTURE CONSIDERING PROGRESS OF TUNNEL FACE

In this study, a method which takes into account the three-dimensional effects of the tunnel face progression in two-dimensional plane strain analyses is proposed by introducing the 'equivalent initial stress'. The proposed method can be easily applied to time-dependent analyses of the behavior of tunnel support structures installed in a visco-elastic medium. The tunnels considered here are circular in shape, being driven in homogeneous isotropic linear visco-elastic media having hydrostatic intial stresses. In the first part of this paper, detailed discussions of the proposed equivalent initial stress are given. The second deals with the mathematical formulations for obtaining closed-form solutions for the pressure acting on tunnel support structures. In the third, numerical results and discussions are given, and special attention is paid to the effects of both the time-dependent mechanical properties of the material and the tunnel face progression. Finally, the theoretical results obtained here are utilized for interpretation of field measurements.

  • Corporate Authors:

    Wiley (John) & Sons, Limited

    Baffins Lane
    Chichester, Sussex  England 
  • Authors:
    • Sakurai, S
  • Publication Date: 1978

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Filing Info

  • Accession Number: 00183808
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 29 1978 12:00AM