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Diurnal Variation of the Dust Concentration in a Railway Tunnel
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 Title & Authors
Diurnal Variation of the Dust Concentration in a Railway Tunnel
Woo, Sang Hee; Kim, Jong Bum; Hwang, Moon Se; Tahk, Gil-Hyun; Yoon, Hwa Hyeon; Yook, Se-Jin; Bae, Gwi-Nam;
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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 . 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 to due to the train. Particularly, the dust concentration was greatly increased to more than during the morning rush-hour times.
 Keywords
Dust;Railway;Rush hours;Tunnel;
 Language
Korean
 Cited by
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