Stability Analysis by Strength Reduction Method in Shallow Buried Tunnels

Shallow buried tunnels are commonly seen in engineering practice. To understand the failure mechanism of a shallow buried tunnel is of significance in engineering practice. There is a reasonable judging index lacking in tunnel stability. The strength reduction method (SRM) gained limited status of geotechnical materials by reducing the computation parameters. Then, the failure zone can be obtained and shown. Finally, a safety factor can be obtained by this progress. This method has been used in slope stability analysis. The usage of this method is a new field. Based on shallow tunnel computation model under different cover depth, the SRM method is adopted in finding the safety factor of shallow buried tunnels. The displacement curve, changing with the strength reduction factor, is drawn and the catastrophe point is found as the safety factor. Further, in comparison with the failure criteria of plastic zone connection and non-convergence, and also compared with model tests, failure mechanism of shallow buried tunnels is analyzed. Specialty of these safety factors is discussed and it is proved that they maintain accordance. This research is significant for a tunnel safety factors study.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 321-331
  • Monograph Title: Tunneling and Underground Construction

Subject/Index Terms

Filing Info

  • Accession Number: 01531665
  • Record Type: Publication
  • ISBN: 9780784413449
  • Files: TRIS, ASCE
  • Created Date: May 22 2014 3:04PM