Tunneling beneath Cairo
by David W. Campo, P.E., M.ASCE, (Sr. Geotech. Engr., Parsons Brinckerhoff, NY) and Donald P. Richards, P.E., F.ASCE, (Sr. Tunnel Advisor, Lachel & Assocs., Inc., Golden, CO)
Civil Engineering—ASCE, Vol. 70, No. 1, January 2000, pp. 36-41
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| 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. |
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