In a tunnel, safety depends on which way the smoke goes. We model ventilation, smoke backlayering and evacuation conditions.
For critical infrastructure we describe each project as the client has presented it publicly. Details of the analyses stay with the client.
Świnoujście
Świna Tunnel
Road tunnel under the Świna strait
What we checked
Warsaw
Metro Line 2
M2 metro line
What we checked
Photo: Wikimedia Commons, photo by Stanisław123455, CC BY-SA 4.0
Szczecin
S6 tunnel under the Oder
Road tunnel, approx. 5 km
What we checked
Visualisation: GDDKiA Szczecin branch, press material (via NBI)
Warsaw
Rembertów tunnel
Road tunnel under railway tracks, 140 m
What we checked
Visualisation: PKP Polskie Linie Kolejowe S.A., project visualisation
Warsaw
Warszawa Zachodnia
Railway station after reconstruction
What we checked
Nowy Dwór Mazowiecki
Warsaw Modlin Airport
Airport, passenger terminal
What we checked
Photo: Wikimedia Commons, photo by Rado-NDM / fotopolska.eu, CC BY-SA 3.0
Łódź
Cross-city rail tunnel
Double-track railway tunnel
What we checked
Photo: Wikimedia Commons, photo by Travelarz, CC BY-SA 3.0 pl
Łódź
Łódź Kaliska
Railway station with a three-aisle hall
What we checked
Photo: Radosław Drożdżewski (Zwiadowca21), Wikimedia Commons, CC BY-SA 4.0
Koszalin
Koszalin railway station
Railway station with an under-platform tunnel
What we checked
Visualisation: visualisation by PKP/TBiArchitekci, via portalsamorzadowy.pl
No projects in this category.
A tunnel is long and narrow, with two ends. A fire inside turns it into a chimney, and whether people can get out depends on the ventilation.
On tunnels, metro, rail and airports we work for clients who do not publish the details of their fire safety systems. That is why this page describes projects only as they have been presented publicly, and the results of the analyses stay with the client.
All our clients can expect the same: the report belongs to the client, and we talk about a project only to the extent the client has agreed to.
A tunnel model is hundreds of metres long and needs a fine mesh around the fire source. We split it into sections run simultaneously on our servers, so ventilation options are compared in days rather than weeks.
FAQ
The lowest air velocity at which smoke does not backlayer under the roof against the ventilation flow. A CFD simulation shows whether the designed ventilation achieves it for the given fire size and tunnel geometry.
Yes. We combine the evacuation simulation with the CFD result to compare the time needed to reach a cross-passage or an exit with the time during which conditions in the tunnel still allow escape.
Yes: platforms, mezzanines, station concourses and underground passages. In project descriptions we give only the information the client has made public.
Ideally with a conversation about the scope and the scenario assumptions. On that basis we prepare a proposal with a calculation schedule matched to the design stage.
Car parks Jet fan ventilation and smoke control in underground car parks 
Stairwells Smoke venting and pressurisation of stairs, corridors and lobbies 
Complex buildings Stadiums, halls, malls, theatres, museums and towers 
Evacuation simulations Egress models: stadiums, halls, towers, malls 
Comfort simulations Thermal comfort, airflow, wind 
International projects Middle East, Europe, the Americas Send the plans and a description of the ventilation system. We will reply with the scope, the number of scenarios and the report date.
