STRUCTURAL TESTS OF CAST-IN-PLACE TUNNEL LINERS

Two tests of circular 10-ft. diameter models of cast-in-place tunnel liners are described. One test specimen was unreinforced and the other was conventionally reinforced with 0.44 percent circumferential deformed bars in the inner and the outer faces. Loading simulated vertical active ground loads and lateral passive resistance as the liner deformed. All external forces were distributed over an 8-in. (203 mm) circumferential distance at 30 deg. intervals. The purpose of the tests was to study the structural response, including nonlinear moment redistribution and failure, of a liner with loading and restraint conditions similar to those encountered in the ground. Results of these two tests are compared with results of similar tests on steel-fiber-reinforced specimens. Comparison of the results provide an indication of the influence of reinforcement and passive force stiffness on behavior and strength. Linear analyses are used to study the influence of more realistic distribution of external forces and shear stress between the liner and medium.

  • Corporate Authors:

    University of Illinois, Urbana-Champaign

    Department of Civil and Environmental Engineering
    205 North Mathews Avenue
    Urbana, IL  USA  61801-2352

    Office of the Secretary of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Paul, S L
    • Sinnamon, G K
    • Ferrera-Boza, R
  • Publication Date: 1976-8

Media Info

  • Features: References;
  • Pagination: 115 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00158940
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT/TST/76T-18 Final Rpt., FRA-ORD-75-94
  • Contract Numbers: DOT-FR-30022
  • Files: NTIS, TRIS, USDOT
  • Created Date: Aug 4 1977 12:00AM