Abstract
Pressure fluctuations in a tunnel induced by a high-speed train at over 500km/h were investigated in this study, to realize the rational tunnel lining design. Full-scaled measurements of the tunnel pressure were carried out in the Yamanashi Maglev Test Line to understand the characteristics of the pressure fluctuations. Numerical simulations of the pressure fluctuations were also made, and the theoretical formulas to estimated the pressure fluctuations were modified to use in the higher Mach number region of the train speed, based on the numerical results. The evaluated values from the formulas were carefully compared with the data obtained from the full-scaled measurements. The validity of those formulas was confirmed by the results of those comparisons. The maximum pressure fluctuations induced by the train moving through a tunnel were evaluated to design the tunnel lining used in the high-speed train tunnel such as for a maglev linear motor vehicle.