Theoretical model for micro-pressure wave emission considering the effect of topography around the tunnel portal

Abstract

This paper introduces a simple prediction model for a micro-pressure wave emitted from a tunnel portal. A theoretical analysis was made of the micro-pressure wave produced when a high-speed train goes through a tunnel, considering the effects of topography around the tunnel portal. Sources of the micro-pressure wave are expressed in the terms of a monopole and a dipole. Model predictions were consistent with the model experiments where the exact Green's function was determined by the method of image.