SIMULATION OF FIRE IN A RAILWAY SYSTEM WITH LONG DOUBLE TRACK TUNNELS ESCAPE STRATEGIES

On an alternative with double track tunnels, called "Paradise Alternative", for a high speed train project, consideration has been given to an operation strategy of the section of railway affected by an accident, with the help of the TRANSIT program, which is used to model fires in complex underground networks. The stretch includes the three main tunnels that make up the new railway access proper, the high speed train infrastructure (TAV), linked, by means of galleries, to other parallel, auxiliary tunnels, VAL infrastructure (Light Auxiliary Vehicle). The different simulations performed take into account the "chimney" effect, caused by the weather conditions around the tunnel entrances, the "piston" effect, caused by the crossing of another train and a fire power that reaches 50 MW in 20 minutes. Out of the 48 defined scenarios, six have been assessed. From the relevant simulations, the escape strategies to be recommended were determined, so that they could be included in the Operation Safety Manual and automatically incorporated into the measures to be taken in the operation safety system of the section. For the covering abstract see ITRD E114957.