Kamennoostrovsky Bridge
{{Short description|Bascule bridge in Saint Petersburg, Russia}}
{{Infobox bridge
| name = Kamennoostrovsky Bridge
| image = 300px
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| coordinates = {{Coord|59.977544|N|30.301225|E}}
| crosses = Little Nevka River
| locale = Saint Petersburg
| official_name = Kamennoostrovsky Bridge
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| material = metal
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| architect = {{unbulleted list|P. A. Areshev|V. S. Vasilyev}}
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| engineering = {{unbulleted list|V. V. Demchenko|B. B. Levin}}
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Kamennoostrovsky Bridge spans the Little Nevka River and connects Aptekarsky Island with Kamenny Island in Saint Petersburg, Russia. Originally constructed as a floating pontoon bridge in 1760. Between 1811 and 1813, Kamennoostrovsky Bridge became the first seven span timber arch bridge in Russia. In 1859, the bridge was improved with the addition of strut-supported spans. In 1952, the bridge was rebuilt to its current design with five spans.{{Cite web|url=https://en.mostotrest-spb.ru/bridges/kamennoostrovskij|title=Kamennoostrovsky Bridge|access-date=December 10, 2017}}
Original construction
19th century improvements
Between 1811 and 1813, Project Engineer Agustín de Betancourt replaced the floating bridge with a seven span wooden arch bridge on timber foundations with stone abutments. The total length of the bridge in this form was {{Convert|150|m|ft|1}}.
In 1859, Project Engineer {{ill|Anton Shtukenberg|ru|Штукенберг, Антон Иванович}} conducted a complete reconstruction of the bridge. The arch design was replaced with a complex strut-frame system.
In 1899, during repair work, the bridge was completely rebuilt again. This reconstruction converted the bridge from a seven span to an eleven span simple timber bridge.
20th century improvements
In 1938, the bridge was renovated. Metal I-beams replaced the wooden girders, granite facing replaced old stone abutments, and the intermediate supports were renovated.
In 1953, under Project Engineers {{ill|Vladimir Demchenko|ru|Демченко, Владимир Владимирович}} and B. B. Levin work began to improve the bridge again. Project architects P. A. Areshev and V. S. Vasilyev designed a new five span metal bridge including a central draw span to accommodate increased traffic and load weights. The draw span was a twin-leaf rolling bascule system with fixed counterweights and was powered by an electromechanical drive. Currently, the span is no longer functional.
See also
References
{{Reflist}}
{{commons category}}
{{Little Nevka Bridges}}
Category:Bridges in Saint Petersburg
Category:Cultural heritage monuments of regional significance in Saint Petersburg