Alexander Nevsky Bridge across the Neva River

Alexander Nevsky Bridge across the Neva River

St. Petersburg (reconstruction)
Design, Detail Design Development
Project period: 2000 – 2002
Client: Saint-Petersburg Committee for City Improvement and Road Infrastructure

Main parameters of the Bridge:

- length: 910 m (including ramps)
- span layout: 49.8+110,0+123,5 m
- width between railings: 35 m
- carriageway width: 29 m, accommodating tram rails and 3 traffic lanes in each direction 
- the central draw part is a 50 m long double-leaf steel span.

Stroyproekt was invited to be the Designer for the Project in June 2000 when the reconstruction had already started and there was a real danger that the bridge might collapse. Stroyproekt had to cope with several complicated tasks within few days and weeks: develop a new reconstruction concept, reduce construction time using new engineering solutions while excluding any risks for the bridge traffic.

The new design provided for a full reconstruction of the bridge draw span and strengthening of the reinforced concrete deck using external prestressed tendons; the works lasted 2 years.  Every operation had to be well thought out to comply with navigation requirements. Considering an extraordinary complexity of the project and the need for a strict control of operations Stroyproekt set up a permanent engineering support group as part of the Designer's Supervision agreement.  Eventually the traffic on the bridge was interrupted just for 4 months when the draw span was being repaired.

Concrete decks have been strengthened with external prestressed reinforcement. The draw span pavement has been made of guss asphalt.


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