This paper presents a review of the grouting works of Line 2 of the Greater Cairo Metro System. The Nile River alluvial deposits underlying this ancient city provided for a challenging and sometimes difficult grouting project. Permeation grouting using state-of-the-art computerized grouting technqieus, as well as extensive ground treatment by jet grout, was performed for soil consolidation and/or groundwater control. During the project, over 425,000 m~3 of ground was treated, requiring 1.4 million linear meters of drilling and PVC injection pipel, 54, 000 m~3 of bentonite cement and 230,000 m~3 of chemical and mineral grout. In addition, over 70,000 m~3 of ground was treated using the jet grout method. Relative to major international transportation projects, the grouting works for Line 2 of the Cairo Metro represent one of the largest worldwide grouting endeavors to date.
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