THEORETICAL AND LABORATORY STUDY OF DEEP-BASED STRUCTURES. VOLUME I. TRIAXIAL MACHINE FOR STATIC AND DYNAMIC TESTING OF 12-INCH DIAMETER ROCKS

Design and fabrication of large-scale testing machine for static and dynamic testing of rock cavity reinforcement is described. The machine is patterned after a smaller prototype developed previously for DNA. The larger-scale machine can be used to apply static and dynamic triaxial loads on specimens that are 12 inches (0.3 m) in diameter and 12 to 18 inches (0.3 to 0.45 m) high, with rock cavities 2 inches in diameter. A variety of triaxial loadings are possible which permit laboratory simulation of different loadings imposed on deep-based structures in the field. The machine can apply vertical pressures up to 2 kbar (0.2 GPa) statically and to 1 kbar (0.1 GPa) dynamically. The maximum lateral pressure is 1.5 kbar (0.15 GPa) statically or dynamically. The testing machiine can also be used to apply dynamic loading superimposed on a static preload. The static preload pressures can be as large as 0.2 kbar (0.02 GPa). The tunnel cavity is maintained at ambient pressure, with access at both ends for photography and electrical instrumentation. (Author)

  • Corporate Authors:

    SRI International

    333 Ravenswood Avenue
    Menlo Park, CA  USA  94025-3493

    Defense Nuclear Agency

    6801 Telegraph Road
    Alexandria, VA  USA  22310
  • Authors:
    • Senseny, P E
    • Lindberg, H E
  • Publication Date: 1977-12

Media Info

  • Pagination: 139 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00191803
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: AD-E300-404 Final Rpt.
  • Contract Numbers: DNA001-75-C-0245
  • Files: TRIS
  • Created Date: Jul 11 1979 12:00AM