Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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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
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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.

지하터널에서 도시철도 운행 중 휠과 레일의 접촉에 의해 먼지가 발생되고, 이 먼지는 도시철도에 기인하는 열차풍에 의해 부유하고, 이 중 일부는 중력침강에 의해 바닥에 침착된다. 이 연구에서는 도시철도 터널에서 먼지농도의 일변화를 조사하였다. 도시철도 운행에 따른 먼지농도의 변화를 쉽게 관측하기 위하여 단일구간의 터널을 측정대상으로 선정하였다. 5nm에서 $20{\mu}m$ 범위의 먼지를 측정하기 위하여 4종류의 입자측정기를 사용하였다. 도시철도가 측정지점을 통과하는 시각을 정확히 파악하기 위하여 3차원 초음파 풍속계와 비디오 카메라를 사용하였다. $50{\mu}g/m^3$ 이하이던 지하터널의 먼지농도는 도시철도의 운행에 의해 $150{\mu}g/m^3$ 이상까지 유의하게 증가하였고, 특히 출근시간대에는 $250{\mu}g/m^3$ 이상으로 크게 높아졌다.

Keywords

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