Abstract:

Indoor pollutant balance equation of operating Metro works is established by multibox model. The reliability of the equation is analyzed. The variation characteristics of CO2 concentrations in Metro stations and running tunnels are analyzed on basis of the timedependent variation rules of the passenger flows of Metro works. The analysis results show that the pollutant concentrations in Metro stations is stable and the air quality is good, while the pollutant concentrations in running tunnels vary with the passenger flows and the air quality is poor. The air quality in the running tunnels can be improved by increasing the fresh air supply.

Key words: Metro, air quality, pollutant, ventilation