CURVED BEAM ANALOG FOR TUNNEL DESIGN IN MASSIVE ROCK

A curved-beam analog is shown to be valid for tunnel design in massive rock. A "mechanics of materials" analysis is used that retains a physical model of the dominant stress action by assuming an experimentally verifiable deformation, thus radically simplifying the mathematics, and providing a continued insight as complexity is added to the fundamental problem. The specific technique, curves-beam analysis isolates some of the material immediately surrounding the opening in the mass, and bordering on the uniform stress field, as a uniformly loaded ring, for which there is precedent. Qualitative and quantitative studies give an orientation into the mechanisms involved, particularly the deformation-controlled loading along the outer boundary of the ring, which was most simply handled by postulating a "degenerate" beam action. /ASLE/

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00095463
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #4989 Proceeding
  • Files: TRIS
  • Created Date: May 29 1975 12:00AM