FIELD STUDY OF TUNNEL PREREINFORCEMENT

A program of field instrumentation was implemented at two tunnel sites to examine the mechanisms by which prereinforcement and, in particular, spiling reinforcement work. The investigation was designed to address questions primarily related to the magnitude, distribution, and time history of the deformation-induced tension and bending of spiles as a result of excavation. Deformation induced tension was shown to be major mechanism by which spiling reinforcement displayed its effectiveness. Results also indicated that the reinforced arch thickness was strongly dependent on ground type, while arch capacity was largely a function of opening size, shape, and depth. A study of reinforced ground-support system interaction revealed two methods by which the loads on internal supports can be predicted. One method considered stress relaxation within the reinforcement, while the other examined the characteristics shape of spile stress distributions. /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: 1978-8

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1091
• Serial:
  • Journal of Geotechnical and Geoenvironmental Engineering
  • Volume: 104
  • Issue Number: GT8
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0241
  • Serial URL: http://ojps.aip.org/gto

Subject/Index Terms

• TRT Terms: Bending; Deformation; Deformation curve; Excavation; Ground handling; Loads; Material reinforcement; Mechanical relaxation; Soil arching; Tension; Tunnels
• Uncontrolled Terms: Ground
• Old TRIS Terms: Ground support; Stress distribution (Soils)
• Subject Areas: Aviation; Bridges and other structures; Geotechnology; Highways;

Filing Info

• Accession Number: 00184867
• Record Type: Publication
• Source Agency: ASCE Journal of the Geotechnical Engineering Div
• Report/Paper Numbers: ASCE 13948 Proc Paper
• Files: TRIS
• Created Date: Feb 3 1979 12:00AM