(ROAD TUNNELS: EMISSIONS, VENTILATION ENVIRONMENT)

TUNNELS ROUTIERS: EMISSIONS, VENTILATION ENVIRONMENT

This paper provides new design information for dimensioning longitudinal and semi-transverse ventilation systems for road tunnels. The choice and design of a tunnel ventilation system depends on: (1) tunnel length; (2) number of tubes; (3) whether the tunnel is urban or rural; (4) fresh air requirement under normal and special traffic situations; (5) admissible air pollution around the tunnel portals; and (6) fire safety considerations. The procedure for calculating the fresh air requirement is the same as in previous PIARC reports. This requirement is discussed in relation to: (1) traffic and tunnel data; (2) admissible concentrations of various substances; and (3) exhaust emissions. Relevant formulae, tables of emissions for various vehicle types, and other tables are included. Some specific results are given for tunnel air: (1) out of a portal; (2) out of a chimney; (3) particle filtering; and (4) gaseous cleaning. The choice between longitudinal and semi-transverse ventilation is discussed, and some formulae and results are presented for both types of ventilation.

  • Availability:
  • Corporate Authors:

    PIARC COMMITTEE ON ROAD TUNNELS

    LA GRANDE ARCHE
    PAROI NORD, NIVEAU 1, PARIS LA DEFENSE, CEDEX 04  France  92055
  • Publication Date: 1995

Language

  • Undetermined

Media Info

  • Features: References;
  • Pagination: 64 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00724180
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 2-84060-034-X
  • Files: ITRD
  • Created Date: Aug 19 1996 12:00AM