Experimental study on ventilation shaft locations for alleviating transient pressure induced by high-speed trains passing through underground station

When a train passes through underground stations quickly, strong transient pressure fluctuations will generated. In this paper, a moving model experimental device is adopted to explore the distribution of transient pressure on the surfaces of train and platform screen doors when the train passes through an underground station. An analysis of the effect of ventilation shaft locations on alleviating transient pressure was also carried out. The findings indicate that the pressure fluctuations of corresponding monitoring points on different platform screen doors are quite different. The ventilation shaft can affect the pressure peak values, and the influence characteristics of the shaft at different locations are quite different. The shaft located next to the platform has the most profound impact on alleviating the transient pressure amplitude on the surfaces of the train and platform screen doors. In comparison to a station without a shaft, the pressure amplitude of the monitoring point H2 arranged on the train surface can be reduced by 47.1%, and the pressure amplitude of the monitoring point P1 on the surface of platform screen doors decreases by 71.3% when the shaft was set near the platform.