Cable-stayed bridge at St. Petersburg
Currently, the 46.6 km Western Ringroad is the largest infrastructure project in St. Petersburg, Russia. The highway will create a quick connection between the northern and southern parts of the city and the Vasilievsky Island and improve traffic conditions.
At the centre of the project is the 620 m long bridge across the Korabelny channel. Doka is the supplier of an efficient and easily adaptable formwork solution for constructing both pylons and main piers.
The centre section of the Western High Speed Ringroad (WHSD) measures 11.5 km and is the most difficult section of the infrastructure: 7 km of it run across the Gulf of Finland. The topography requires construction of a flyover, a tunnel and three bridges. The cable-stayed bridge across the Korabelny Channel measures a total of 620 m with a 320 m span between the pylons.
These are inclined at 12° from the vertical and are 125 m high overall; the concrete structure measures 99 m and is topped by a steel structure. The bridge superstructure is implemented as a steel structure. For constructing the pylons and the main piers, the Joint Venture ICA Astaldi – IC Ictas – WHSD realizing the project relies on Doka’s expertise.
Telescoping instead of rebuilding
In cooperation with the St. Petersburg branch, the Competence Center for Bridges at Doka Headquarters delivered a high-performing solution that combines crane-lifted and automatic climbing formwork for the pylons, with their sophisticated shapes.
The combination of crane-lifted MF240 climbing formwork and SKE automatic climbing formwork and reduces modification times and, therefore, construction costs in the first eight casting sections. ‘SKE50 plus’ and ‘SKE100 plus’ provide the solution in the typical zones of the pylons.
The cross-sectional area tapers from 63 m² to 18 m². In combination with telescoping platforms, the formwork quickly adapts to the taper of the pylons.