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Concreting is under way on one of three ventilation shafts being constructed for the Al Azhar road tunnel in Cairo's ancient Islamic district. Egypt's biggest construction firm, Arab Contractors, is working with French company Campenon Bernard on the £90M design and construct contract. A 2.8km long, 8.35m internal diameter TBM driven tunnel is currently being constructed. A second twin tube will begin alongside once this is finished. The tunnel passes close to buildings which are ...

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