Cairo Metro Line 3

CLIENTThe Egyptian ministry of Transport
10.8 kilometres
of tunnel

Line No. 3 of the Cairo metro connects the city of Cairo to the airport. Bouygues Travaux Publics was awarded the contract to excavate the first phase (4.3km) of this colossal project which will total 33km and 29 stations.

Bouygues Travaux Publics already completed, as part of a Franco-Egyptian consortium, lines 1 and 2 of the Cairo Metro network, with a total length of 66 km.

The construction of Line 3, is the third project delivered by Bouygues for the Cairo metro network and includes:

  • 5 underground stations, built “top down” within diaphragm walls;
  • One bored tunnel, approximately 3.5 km long and with a finished internal diameter of 8.4m;
  • 1 pedestrian link to line 22;
  • A cut-and-cover access to the maintenance shed of 1.15 km.

The tunnel excavation involves a technical innovation as it was driven with an earth-pressure-balance TBM that could be converted into a slurry machine.

Cleopatra was, of course, Egypt’s last queen, but was also the name given to the tunnel-boring machine (TBM) working 30 metres underground, advancing at a rate of 14 rings of precast-concrete segmental tunnel lining per day, between the stations of Abbasiya, Abdu Pasha, El Geish, Bab El Sharia, and Attaba.

The new line greatly alleviated the capital’s chronic traffic congestion that is asphyxiating the city of Cairo.