METHOD OF COMPUTING A ROCK REINFORCEMENT SYSTEM WHICH IS STRUCTURALLY EQUIVALENT TO AN INTERNAL SUPPORT SYSTEM

A rock reinforcement system may be computed which is structurally equivalent to an internal support system. The amount of reinforcement required depends on the ability of the reinforcement to strengthen the rock mass. Rock reinforcement increases the shear strength properties of a rock mass by increasing the confining pressure in the rock adjacent to the opening. The amount of shear strength increase is a function of the friction angle of the rock mass. A large angle of friction results in a substantial increase in allowable rock stress even though the increase in rock mass confinement due to the rock reinforcement might be quite small. The equivalent pattern of rock reinforcement ultimately selected will depend on the size of the tunnel and established guidelines for length and spacing of reinforcement.

• Supplemental Notes:
  • Proceedings of 16th Symposium on Rock Mechanics, University of Minnesota, Minneapolis, September 22-24, 1975.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Bischoff, J A
  • Smart, J D
• Conference:
  • Proceedings of 16th Symposium on Rock Mechanics, University of Minnesota, Minneapolis, September 22-24, 1975.
• Publication Date: 1977

Media Info

• Features: References;
• Pagination: p. 179-184

Subject/Index Terms

• TRT Terms: Friction; Material reinforcement; Rock mechanics; Shear strength; Stresses; Structural supports; Tunneling; Tunneling machines
• Uncontrolled Terms: Rock reinforcement
• Old TRIS Terms: Supports; Tunnels and tunneling
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways;

Filing Info

• Accession Number: 00164954
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: May 18 1978 12:00AM