Abstract
In Shinkansen lines in areas of heavy snowfall, snow-shelters linking neighboring tunnels are frequently built for snow disaster prevention. These shelters can also become a countermeasure against a micro-pressure wave by installing horizontal slits on their side walls. In this study, a field measurement in an actual snow-shelter section in Shinkansen line is conducted for investigating the micro-pressure wave emitted from the slits of the shelter. Furthermore, a numerical analysis is also conducted under the conditions corresponding to the field measurement. The results of the numerical analysis indicate that the directivity of the micro-pressure wave emitted from the horizontal slits on the shelter is considerably different from that of the micro-pressure wave emitted from the ordinary exit portal of the tunnel.
