Discuss on Tunnel Design for High Speed Metro Line

摘要

When trains with high speed pass through the tunnel, there is pressure fluctuation in the tunnel which will cause discomfort of the driver and the passengers. Using unsteady one dimensional flow model, the aerodynamic effect caused by the train with speed of 120km/s running through the tunnel was calculated and analyzed. The results show that the routine tunnel size of Ф5.5m for metro lines can not meet the standard for comfort level. Instead, tunnels with inner diameters of 6.8m and 10.36m were recommended.