StartServices Tunnel Safety

Tunnel Safety


Safety in underground transportation facilities is affected by many factors.

Among these, the conservation of smoke-free escape routes is of paramount importance in case of a fire incident.

The tunnel itself, cross passages, escape tunnels or emergency stair cases form complex confined air spaces. Counteracting forces like wind pressure or heat-generated buoyancy have the potential to turn around the anticipated movements of fresh air and to allow smoke entering and blocking escape routes.




Risk assessment and risk analysis studies.


Contribution to the development of a comprehensive tunnel safety concept.


Assessment of possible ventilation and smoke extraction scenarios for a given design and application of appropriate methods to evaluate the safety in these scenarios.


Assistance in finding the optimum tunnel ventilation design in consideration of safety issues, economic feasibility and regulatory or contractual requirements.


The applied methods range from the relatively simple measuring against guidelines and standards to the application of well established empirically and theoretically deducted formulations up to the execution of more complex simulation tools like zone models or field models. Beside a number of tailored inhouse codes and utilities, for the simulation of the aerodynamics and thermodynamics of tunnel fire ventilation, the proven and well established commercial software IDA-RTV (EQUA Simulation AB, Sweden), the public domain code FDS (Fire Dynamics Simulator) and the open source CFD-package OpenFOAM are used.




Please visit our dedicated partner site about tunnel safety.