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  Ismailia Road Tunnel crossing the Suez Canal

  The Ismailia road tunnel is a twin tube road tunnel that crosses the existing and new Suez Canal north of the city of Ismailia. It is part of a development project in the Suez Canal zone. The completion of the development project including the tunnel has the highest priority in Egypt. The project is to give a boost to economic growth in the region. It is being delivered to the client, the Engineering Authority of the Armed Forces (EAAF) on a tight schedule by contractors Petrojet and Concord for Engineering and Contracting, which means that design and construction run in parallel. This paper will address the major design aspects of this challenging scheme.The tunnel, with two parallel tubes, is being built to a maximum depth of almost 70 meters below ground level. The total length of the bored tunnels will be about 4.8 kilometres. Ramp structures, concrete boxes for the deep sections and U-shaped open approach ramps for shallow sections, were constructed in a trench supported by temporary diaphragm walls and anchors. Four deep shafts were built, to allow inspections and maintenance to the tunnel boring machines, just before and after the Suez Canal crossing. Every 1000 meters cross passages between the traffic tunnels will be built to allow evacuation in case of a calamity in one tube. Ground freezing technology will be used to control groundwater and support the opening of the cross passage. In between the cross passages dedicated emergency exits will allow safe evacuation of tunnel users below road level.

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