The Upper Narrows Tunnel on Highway 160 in southern Colorado has been designed with a unique system of escape adits to provide for life safety in the event of emergencies in the tunnel. The use of adits provides for a higher level of safety in this application than would be provided by the more common ventilation system. A summary of the unique project conditions that facilitate such a system is presented, and the methods of analyses and results of calculations used during the design are reviewed.
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References
1.
Parsons Brinckerhoff Quade & Douglas, Inc.SH160—Wolf Creek Tunnel, Tunnel Systems Report. Carter Burgess, Inc.; Haley & Aldrich, Inc., June1999.
2.
Parsons Brinckerhoff Quade & Douglas, Inc.Subway Environment Simulation (SES) Computer Program, Version 3, Part 1: User’s Manual. In Subway Environmental Design Handbook, Vol. 2, U.S. Department of Transportation, Oct.1980.
