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http://dx.doi.org/10.7782/JKSR.2015.18.1.8

Prediction Method and Characteristics of Micro-pressure Wave on High-speed Railway Tunnel  

Yun, Su-Hwan (Korea Railroad Research Institute)
Nam, Seong-Won (Korea Railroad Research Institute)
Kim, Seok-Won (Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Railway / v.18, no.1, 2015 , pp. 8-14 More about this Journal
Abstract
This paper describes a prediction method for micro-pressure wave emitted from a tunnel on the Kyung-bu high-speed railway. Pressure and micro-pressure wave were measured simultaneously to obtain some constants for the prediction method. The change of a micro-pressure wave were analyzed according to the speed of the train, the track bed type, and the distance from a tunnel portal. At a train speed of 300km/h, the micro-pressure wave of 4.0km long ballast track tunnel is about 7.5Pa; that of 3.3km long slab track tunnel is about 14.3Pa The strength of the micro-pressure wave decreases in inverse proportion to the distance and becomes about 0.5~1.0Pa at a point of 100m from the tunnel exit. Micro-pressure waves were predicted using the formula with the obtained the constants. Using a comparison between the predicted data and field measurement data, it was confirmed that micro-pressure wave can be predicted easily through the prediction formula.
Keywords
Micro-pressure wave prediction; Pressure wave; Field measurement; High-speed train;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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