Blagoveschensky Bridge across the Neva River

Blagoveschensky Bridge across the Neva River

St. Petersburg (reconstruction)
Design, Detail Design Development
Project period: 2005 – 2007
General Designer: Institute Stroyproekt JSC
Client: Committee for City Improvement and Road Infrastructure of St. Petersburg Administration


Originally the bridge had 7 fixed spans with cast iron arches and a draw span consisting of 2 swing sections.

The bridge was 24 m wide and 336 m long. The bridge had an ornamental cast iron lattice parapet designed by A. Bryullov. In 1936 – 1939 the bridge was reconstructed. The cast iron structures were replaced with steel ones. The bridge configuration also changed: light laced arches were replaced with solid beams hanging over the Neva.

The design developed by Stroyproekt included widening of the bridge to be 37 m and a complete replacement of the decks. Individual design solutions for the fixed and draw spans allowed preserving the original foundations on wooden piles.  After the reconstruction the bridge assumed most of its historical appearance. For the construction period, a temporary bridge was built next to the reconstructed one to divert the traffic.

On 15 August 2007 the bridge was opened after reconstruction and recovered its original name. 

On 24 January 2008, in the Hermitage Theater, M. Piotrovsky, Chairman of the St. Petersburg World Club, awarded Alexey Zhurbin, General Director of Institute Stroyproekt, an Honorary Diploma and a Sign of Conformance for the design of Blagoveschensky Bridge reconstruction and a great contribution to the city transport infrastructure improvement.







The bridge became one and a half times wider (36 m instead of 24 m) and was redesigned for nowadays loads, but at the same time we managed to preserve historical foundations of wooden piles. It became possible due to the deck self-weight decrease and a new design solution providing for the draw span deck to be supported not by piers but by fixed decks. Such structure allowed achieving central bearing on the draw piers and excluding eccentricity.


 

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