Soil tunnel Interaction under Medium Internal Blast Loading
A series of numerical simulations were carried out to study the interaction between subway tunnels and soils subjected to medium internal blast loading 200 kg of TNT equivalent) The excess pore water pressure was studied with an existing soil model (FHWA) that can simulate pore water pressure and effective soil pressure. A recently developed blast loading scheme that removes the necessity of modeling the explosive in the numerical models but still maintains the advantages of nonlinear fluid structure interaction was used to study the process of blast wave propagation in the air domain inside the tunnel.