STUDY OF A NEW 220 KM HIGH-SPEED RAIL LINE IN WESTERN ALGERIA

The project aims to create a two-track 220 km High-speed Line (200 km/h for passenger trains and 120 km/h for freight trains) in Western Algeria. This major project is part of the East-West Bypass Route (Annaba-Alger-Oran-Moroccan border) modernization program. The mountainous topography requires the construction of several engineering structures including 12 tunnels (total length 8 km), 99 road grade separations above the railway tracks and 64 railway bridges. Long range spans (up to 120m long) were recommended for viaducts on very high piles (up to 125m high) in order to reduce the number of intermediate piles. Alternative options using metal structures or corbelled pre-stressed concrete boxes were also studied.

Services provided (2005 to 2007)

Dessau was awarded a contract to carry out the preliminary study, preliminary design, detailed final design, and preparation of the shortlist of contractors file (SCF).

The following areas of expertise were provided:

• Topography
• Geology and Geotechnics
• Rail alignment
• Railway infrastructures
• Hydrology and Drainage
• Civil engineering structures (Bridges and Tunnels)
• Signalization and Telecommunications
• Maintenance installation
• Stations and Buildings

Client