Description
When traveling through tunnels, high-speed trains generate pressure pulses which can significantly increase the pressure within the tunnel. These pulses maintain elevated pressure levels until the train completes its journey. Moreover, the adjoining technical areas connected to the tunnel ambient through access doors, services transits and cross-passage doors, are also impacted by pressure rise due to leakage. If this issue is not addressed during the design phase, the elevated pressure in these secondary technical spaces can give rise to operational complications. These complications may include equipment and structural damage, and even fatal injuries during routine maintenance operations. Hence, it is imperative to identify and mitigate these pressures early in the design stage.
The objective of this study is to examine the increase in pressure within the secondary spaces. To achieve this, we will employ a simplified calculation approach to estimate the level of leakage occurring in the adjoining areas. Following this, the calculated results will be compared with the findings obtained from compressible 3D Computational Fluid Dynamics (CFD) simulations. Ultimately, the study will offer conclusions and discuss potential measures to mitigate and control the rise in pressure within these specific areas.
