A NON-LINEAR RHEOLOGICAL ANALYSIS OF DEEPLY LOCATED TUNNELS

A rheological model which is able to explain the delayed failure phenomenon has been proposed and applied to the analysis of the time dependent behaviour of deep tunnels. The model is the three element Voigt type before yielding and becomes the five element Voigt type after yielding. This means that the stiffness of the model is decreased by yielding. It is assumed that the yielding takes place when the stored elastic energy density of distortion reaches a certain maximum value. Some experiments to determine material constants are proposed. The numerical results clearly exhibited a delayed failure state of the rock masses around the tunnel surface. It was found that the extension of the yielding zone due to tunnel excavation depends on the opering method. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03639061
• Corporate Authors:

  Wiley (John) & Sons, Limited

  Baffins Lane
  Chichester, Sussex  England 
• Authors:
  • AKAGI, T
  • Ichikawa, Y
  • KURODA, H
  • Kawamoto, T
• Publication Date: 1984-9-10

Media Info

• Features: Figures; References;
• Pagination: p. 457-471
• Serial:
  • Intl J for Num & Analytical Methods in Geomechanic
  • Volume: 8
  • Issue Number: 5
  • Publisher: Wiley (John) & Sons, Limited
  • ISSN: 0363-9061

Subject/Index Terms

• TRT Terms: Age; Behavior; Deformation; Failure; Failure analysis; Mathematical analysis; Mathematical models; Rheology; Rock mechanics; Rocks; Structural design; Time; Tunnels; Underground structures
• Uncontrolled Terms: Subterranean; Tunnel design
• ITRD Terms: 1757: Age; 6471: Analysis (math); 9001: Behaviour; 5595: Deformation; 5520: Failure; 6473: Mathematical model; 5442: Rheology; 4154: Rock; 4372: Subterranean; 5414: Time; 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction; Design; Geotechnology; Highways; Public Transportation; I25: Design of Tunnels; I43: Rock Mechanics;

Filing Info

• Accession Number: 00393585
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Apr 29 1985 12:00AM