Prediction Method and Characteristics of Micro-pressure Wave on High-speed Railway Tunnel
| Autor: | Seok-Won Kim, Su-Hwan Yun, Seong-Won Nam |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Ballast
Track bed Pressure wave Engineering Field (physics) business.industry Strategy and Management Geography Planning and Development Energy Engineering and Power Technology Transportation Structural engineering Mechanics Track (rail transport) Automotive Engineering Slab Point (geometry) business Civil and Structural Engineering Railway tunnel |
| Zdroj: | Journal of the Korean society for railway. 18:8-14 |
| ISSN: | 1738-6225 |
| DOI: | 10.7782/jksr.2015.18.1.8 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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