Performance investigation of emergency ventilation strategies in a new section of a road tunnel

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TypeArticle
Journal titleTunnel Management International Journal
Volume9
IssueJune 2
Pages2226; # of pages: 5
SubjectTunnels
AbstractThe National Research Council of Canada (NRC) conducted a study to evaluate the effectiveness of the current emergency ventilation system (EVS) to control smoke and hot gases originating from fires in a new section of a road tunnel in Montréal, Canada. The project uses the Computational Fluid Dynamics (CFD) technique for simulating smoke movement behaviour. Data from full-scale tests were used to verify the CFD model. The study provided recommendations to improve the effectiveness of the EVS. The study findings indicated that the effectiveness of the EVS was significantly affected by large pressure losses in the ventilation fans plenum and by the obstruction of large concrete beams to airflow. To improve the effectiveness of the ventilation fans, the study recommended the introduction of a ducting system to control airflow losses and to better direct airflow in such a way as to avoid impacting on the beams. With the high ceiling in this section of the tunnel, the possibility of collecting and storing smoke and hot gases at high elevations was investigated by operating the EVS in exhaust mode.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number45565
18736
NPARC number20378168
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Record identifier48f058c3-96c7-48cc-87f3-c7a05750da73
Record created2012-07-24
Record modified2016-05-09
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