Comparison and Analysis of Different Dilution Standards of Pollutants in Tunnel Ventilation

This study is conducted to make detailed comparisons and discussion of different dilution standards of pollutants in tunnels based on domestic specifications JTJ026.1-1999 and PIARC2012 (World Road Association). From three aspects (the method for calculating required air volume in tunnel ventilation, emission of vehicles, and admissible in-tunnel concentrations of toxic gases) this paper has made a comparative analysis between domestic specification JTJ026.1-1999 and PIARC2012. Taking the Donghu tunnel in WuHan for instance, the research calculates the required airflow volume in the Donghu tunnel based on the two different sets mentioned above. The calculation results show that there is a huge gap between the two sets for tunnel ventilation. The results of field measurement in Yan'an Donglu Tunnel also prove that the concentration of CO is relatively low, in fact. JTJ026.1-1999 is conservative in reduction coefficient of CO. Nitrogen oxides and non-exhaust particulate matter emissions are becoming dominant factors instead of CO in calculating required air volume for normal operation of tunnel. In order to keep pace with future traffic volume and vehicle emission standards in China, domestic specifications should be improved in terms of vehicle emissions and threshold value of toxic gases so as to make calculation for required air volume in tunnel more reasonable and economical.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 547-557
  • Monograph Title: Tunneling and Underground Construction

Subject/Index Terms

Filing Info

  • Accession Number: 01531606
  • Record Type: Publication
  • ISBN: 9780784413449
  • Files: TRIS, ASCE
  • Created Date: May 22 2014 3:05PM