CAIRO METRO LINE 3
|Customer:||Joint Venture VINCI/ BOUYGUES/ ARABCO/ ORASCOM|
Machine Type: EPB Shield
The start of the Cairo subway project dates back to 1950, with the Egyptian subway being the first subway to be planned for Africa.
The first line was constructed during the 1980s. This line, mainly elevated, runs over a distance of 44 km from north to south and serves 33 stations. The second line, which went into service in the 1990s, serves 20 stations over a distance of 22 km. There are plans for a total of six lines by 2022.
An underground rail system is necessary in order to ease traffic congestion in the Egyptian capital. With a population of 17 million and a density of 35,000 inhabitants/km², Cairo is one of the most highly and densely populated cities in the world, way ahead of New York (25,000/km²).
Structure of the Project
Construction began on line 3 in 2007. Eventually, this underground line will cross the city from east to west covering 35 km (29 stations) and will provide a link to the airport by crossing underneath the River Nile. It will go into service in two stages – at the end of 2011 and then at the end of 2013. Line 3 will have the capacity to transport 2 million passengers per day.
MÜHLHÄUSER (former NFM) is supplying an earth pressure balance tunnelling machine with a diameter of 9.46m for the second stage of the project. The machine will excavate the 5,138m linking the stations of Cairo Fair, Stadium, Kolleyet El Banat and El Ahram, through ground composed mainly of clay, sand and sandstone.
At the request of the client, the tunnelling machine will be specifically designed so that if necessary it can be adapted to “slurry” mode.