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Tunnel ventilation system for the Doha Metro

June 2020

Tunnel ventilation system for the Doha Metro (Photo: Zitrón)
Tunnel ventilation system for the Doha Metro (Photo: Zitrón)

The Doha Metro project is a special feature for all the contractors involved. One of the major challenges is the extremely tight schedule due to the upcoming 2022 FIFA Football World Cup, the main driver of many projects recently launched in the State of Qatar.


Phase I of the Doha Metro is currently the most challenging project for tunnel ventilation systems (TVS) in the world. The Spanish company Zitrón, as a TVS designer and supplier, therefore had to implement an execution package consisting of integral design, manufacture, transport, installation and commissioning at short notice. It included equipping all 42 underground stations as well as some other specific locations along the four new metro lines with a modern tunnel ventilation system. This required, among other things, several hundred pieces of mechanical equipment with fire resistance (250 degrees Celsius for 2 hours); in addition, 1,400 kilometres of cable were laid for fire protection (250 degrees Celsius for 2 hours).


BIM for project completion


For the Doha Metro project, the Zitrón Interface Team recruited a multidisciplinary workforce of civil, mechanical and electrical engineers, supported by a building information modelling (BIM) team of specialist engineers and modelers.

The team’s high performance, flexibility and problem-solving mentality paved the way to successfully integrate the design of the tunnel ventilation system and to deliver it on time and on budget. The BIM used software required all parties to work in the same 3D environment, exchange information in real time and coordinate their activities in a virtual space. Any changes made by architectural or other sub-system designers could be detected in real time, and this helped to improve the implementation of each party’s design or prepare the necessary information to be discussed in the interface meetings and workshops set up to resolve the conflicts that arose.