Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

For this purpose, a detonation of TNT in a tunnel with a cross-section of up to 55 m2 is considered. Results show good agreement between the numerical simulations and experiments. The transition zone between the three-dimensional (3D) and the 1D wave is well detected. An application to a simplified subway station is also investigated which shows that significant planar waves can be transmitted to the neighboring stations via the junction tunnels.