Technical Assistance & Construction Supervision of the Ashrafieh – Nahr- Sin El Fil Link

This important link of two major east-west thoroughfares joined together across the Beirut River was conceived 25 years ago, but its implementation was delayed until 1994.
The project includes a series of underpasses and bridges inlaid in a dense urban fabric over a difficult topography and bad soil conditions.
Work involved extensive utility relocation which included 1000 mm and 600 mm water mains, a network of waste water and storm water drainage, potable water, power and telephone networks.
The construction included: reinforced concrete underpasses and overpasses, post tensioned prestressed concrete box-girder bridges, reinforced earth embankments reaching 15 m height, high reinforced concrete retaining walls with tie back anchors, and 80 cm diameter reinforced concrete pile foundation drilled to a depth of more than 35 meters in river bed critical soil conditions.
The components of the project include:

• 220 m long, 10 m wide bridge on a steep grade and horizontal curve, on piers reaching 12 m height, founded on piles reaching 25 meters depth,
• 30 m length tunnel, 7 m wide, on a sharp curve,
• Highway embankments, 7 m high,
• 125 m tunnel, 20 m wide, 10 m each carriageway,
• 60 m bridge, 10 m wide,
• Dual bridge over railroad, two independent structures, prestressed concrete, 30m span,
• Dual bridge over River Beirut, two independent structures of 105m long each, 3 spans (36-37-32 meters) of post-tensioned prestressed concrete box-girder, founded on piles reaching 35 meters depth,
• A series of underpasses and walls in reinforced earth reaching a height of 11 m,
• 20 m high retaining walls with permanent tie back anchors shoring high residential buildings,
• Foundation soil treatments including soil replacements and sand draining piles & others,
• Partial demolition and rehabilitation of existing buildings partially expropriated ,
• 600 m of D.C.I water pipe of 1000 mm diameter, 3500 m of waste water and storm water conduit pipes and channels with appropriate appurtenances and houses connections,
• Complete traffic control system and safety equipment including: traffic light signalization, control signs, road marking paints and concrete and steel safety barriers.