TUNNEL DESIGN CONSIDERATIONS: ANALYSIS OF MEDIUM-SUPPORT INTERACTION

Practical aspects of the application of analytical techniques to geotechnical problems are reviewed with emphasis on medium-support interaction problems in underground structures. It is recognized that the analysis should be carried out in several stages, reflecting the initial state of stress in the medium, the construction process and the period of operation. A finite element program called GEOSYS that is capable of performing this type of analysis is described. The capabilities and the limitations of this and other current analytical techniques in regard to the multi-stage analysis are discussed. The results from a series of two-dimensional, plane-strain, finite element analyses of medium-liner interaction for a circular tunnel are presented. Three types of medium properties are considered, namely, linearly elastic, elasto-plastic and time-dependent. Also considered in these analyses is a simple sequence of excavation and liner placement. A comparative study of the effect of the material properties on the liner forces is made.

  • Corporate Authors:

    University of Illinois, Urbana-Champaign

    Department of Civil and Environmental Engineering
    205 North Mathews Avenue
    Urbana, IL  USA  61801-2352
  • Authors:
    • Ghaboussi, J
    • Ranken, R E
  • Publication Date: 1974-11

Media Info

  • Pagination: 84 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095710
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Report/Paper Numbers: FRA-ORD&D 75-24 Final Rpt.
  • Contract Numbers: DOT-FR-30022
  • Files: TRIS, USDOT
  • Created Date: Jul 15 1975 12:00AM