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Diurnal Variation of the Dust Concentration in a Railway Tunnel

도시철도 터널 내 부유먼지의 일변화 특징

  • Woo, Sang Hee (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Kim, Jong Bum (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Hwang, Moon Se (Rolling Stock Research Team, Seoul Metropolitan Rapid Transit Corporation) ;
  • Tahk, Gil-Hyun (Rolling Stock Research Team, Seoul Metropolitan Rapid Transit Corporation) ;
  • Yoon, Hwa Hyeon (Rolling Stock Research Team, Seoul Metropolitan Rapid Transit Corporation) ;
  • Yook, Se-Jin (Graduate School of Mechanical Engineering, Hanyang University) ;
  • Bae, Gwi-Nam (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology)
  • Received : 2016.04.21
  • Accepted : 2016.06.27
  • Published : 2016.06.30

Abstract

In railway tunnels, dust is generated when trains run due to the contact between the wheels and the rails. The generated dust is suspended due to the train-induced airflow, with some of it deposited due to gravitational sedimentation. In this study, the diurnal variation of the dust concentration was investigated in a railway tunnel. A single lane of a tunnel was selected in which to observe more easily the dust concentration due to the passing of a train. Four particle-measuring instruments were utilized to detect dust ranging from 5nm to $20{\mu}m$. To synchronize the train passing time at the measuring location, a three-dimensional ultrasonic anemometer and a video camera were used. It was found that the dust concentration was significantly increased from $50{\mu}g/m^3$ to $150{\mu}g/m^3$ due to the train. Particularly, the dust concentration was greatly increased to more than $250{\mu}g/m^3$ during the morning rush-hour times.

Acknowledgement

Supported by : 국토교통부

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