The Prime Minister and Minister of Interior H E Sheikh Abdullah bin Nasser bin Khalifa Al Thani attended Qatar Railways Company (Qatar Rail)'s celebration to mark the completion of tunnel digging works for the Doha Metro Project on the south side of the Red Line in Hamad International Airport (HIA) Station.
The tunneling works started in July 2014 and a total of 111km were digged by the Tunnel Boring Machine (TBM).
The program included a presentation about the Doha Metro as well as a video on the 21 TBMs, due to which Qatar Rail was officially recognized by the Guinness World Records for the Largest Number of Tunnel Boring Machines Operating Simultaneously in a Single Project, followed by the recent drilling by TBM three months ahead of schedule. Seventy of the total contracts were awarded to local contractors in support of the local economy.
In order to dig 111 kilometers of tunnels, the Doha Metro Project required 470.497 concrete block for the production of 70,071 tubes. With the completion of the tunnels' drilling, 50% of the Doha Metro Project has been completed.