MODEL STUDY OF TUNNEL PREREINFORCEMENT

Physical models were designed for the investigation of two prereinforcement systems: (1) Reinforcing far ahead of the main excavation; and (2) spilling reinforcement ahead of the face. In both cases, the use of reinforcement was responsible for premanently stabilizing an otherwise unstable opening. Data from the physical models were used to calibrate a numerical model from which additional information on long-term behavior, methods to account for the capacity of a prereinforcement system, and the mechanisms involved were ascertained. These studies indicated that prereinforcement can stabilize a rock mass effectively as it reduces deformations and thereby deterioration due to strain softening, provides rock mass confinement leading to increased available strength, and maintains rock arch continuity allowing for increased tangential stress in the immediate vicinity of the opening. /Author/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3519342
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Korbin, G E
  • Brekke, T L
• Publication Date: 1976-9

Media Info

• Features: Figures; References;
• Pagination: p. 895-908
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 102
  • Issue Number: GT9
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Behavior; Calibration; Deformation; Deterioration; Excavations; Mass; Mathematical models; Reinforcement (Engineering); Rocks; Soil stabilization; Tunneling
• Uncontrolled Terms: Models; Rock mass; Stabilization
• Subject Areas: Bridges and other structures; Geotechnology; Highways;

Filing Info

• Accession Number: 00142219
• Record Type: Publication
• Report/Paper Numbers: ASCE #12415
• Files: TRIS
• Created Date: Nov 23 1976 12:00AM