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Tunneling beneath Cairo

by David W. Campo, P.E., (M.ASCE), Sr. Geotech. Engr.; Parsons Brinckerhoff, NY,
Donald P. Richards, P.E., (F.ASCE), Sr. Tunnel Advisor; Lachel & Assocs., Inc., Golden, CO,


Serial Information: Civil Engineering—ASCE, 2000, Vol. 70, Issue 1, Pg. 36-41


Document Type: Feature article

Abstract:

The second phase of the Greater Cairo Metro system in Egypt included many geotechnical challenges. Thirteen kilometers of the 19-km heavy rail line were constructed underground within the water-bearing Nile Valley alluvium. The underground works included construction of cut-and-cover tunnels and stations using diaphragm walls, top-down methods, and state-of-the-art computerized injection grouting. Engineers devised an innovative new method that was successful in minimizing surface settlements for the project. In addition, the project featured the construction of special hand-mined connections to the bored tunnels, interesting tunnel boring machine entry and exit methods from underground stations, and a major building underpinning effort.

Subject Headings: Underground construction | Construction methods | Underground structures | Tunnels | Subways | Project management | Construction equipment

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