VENTILATION AND ASPECTS OF SMOKE CONTROL

This article describes some of the key aspects of ventilation systems for transport tunnels to operate safely. Underground railway tunnels have additional complexities because they are often located near residential areas and noise and emissions must be kept to a minimum. For smoke control in a station, the station must be divided into compartments; and fresh air must be supplied without causing escape routes to become smoke clogged. Natural vents are also often needed to reduce the airflow caused by the piston effect of a train entering a tunnel. The only practical ventilation system is by longitudinal air movement, either by reversible fans or jet fans or a combination of both. Road tunnels must be vented to remove pollution and smoke in the case of fire. The ventilation for specific events depends on whether the traffic is free-flowing or congested. Semi-transverse systems and fully transverse systems can both be used, depending on other aspects of the tunnel. Longitudinal ventilation can be used as long as pollution from the tunnel is acceptable at the portals. Otherwise, the pollution has to be dispersed further. Gives additional suggestions for ventilation designs and publications.

• 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:
  • Smith, T W
• Publication Date: 2003-1

Language

• English

Media Info

• Features: Photos; Tables;
• Pagination: p. 38-41
• Serial:
  • Tunnels & Tunnelling International
  • Volume: 35
  • Issue Number: 1
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Atmospheric circulation; Smoke; Tunnels; Ventilation systems
• Subject Areas: Bridges and other structures; Construction; Public Transportation;

Filing Info

• Accession Number: 00938638
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS
• Created Date: Mar 3 2003 12:00AM