REHABILITATING THE SAN BERNARDINO

The 30 year-old San Bernardino tunnel is showing signs of wear, though it is still safe. Three steps were made to assess damage. The concrete's carbonization depth was determined; electrochemical tests were used to measure the strength of reinforcements; and deformation and shifting of the roadway was measured. The concrete lining was seriously damaged by corrosion at the reinforced lateral joints. Except for that, the top layer of enforcement was practically intact, as long as it was not exposed to oxygen. The intermediate roof was in generally good condition. The rehabilitation project included improvements in tunnel safety by adding a new fire ventilation system and a new system of escape galleries, renewal of the concrete surface slab, better placement of gutters and conduits and improved pavement. Describes the complicated logistics required to carry out the work under trying conditions. The entire project is estimated to take eight years with completion expected in 2006.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0041414X
• Corporate Authors:

  Polygon Media Limited

  Tubs Hill House, London Road
  Sevenoaks, Kent TN13 1BY,   United Kingdom 
• Authors:
  • Wenger, P
  • Schonenberg, L
• Publication Date: 2003-1

Language

• English

Media Info

• Features: Figures; Photos;
• Pagination: p. 27-29
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 35
  • Issue Number: 1
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Chloride content; Concrete; Construction scheduling; Corrosion; Rehabilitation; Safety engineering; Vehicular tunnels
• Identifier Terms: San Bernardino Tunnel
• Subject Areas: Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00938635
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS
• Created Date: Mar 3 2003 12:00AM