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against extreme weather conditons during constructon of the pylon and its 70 m tall approach piers.

At the base the ground plan is 7.8 x 13 m with a 2 m wall thickness, tapering to 7.1 x 7 m with a 0.7 m wall thickness at the top. Careful planning meant that only a single work platorm had to be removed from the SCF assembly, which was done during a pre-scheduled break in construction work. All other adjustments and climbing were carried out safely and without holding up the site work unnecessarily

Seven work levels

The SCF unit provides seven work levels with a total height of 19 m, with the top two used for upstream steel-fxing. As both the external - and unusually also the internal - working platforms were all full-scale, steel-fxing could proceed immediately afer concrete pouring, thus saving tme and increasing safety. On the next two levels, work was carried out on the formwork and the concrete surface heated if necessary. To accelerate work flow, the formwork level also had separate projectng materials platorms served by a crane.

The three trailing platforms round off the rigid, steel-frame climbing pier producton unit. These platorms allowed the concrete to be protected from the weather for two complete cycles after pouring, and again, heated if necessary. The result was that the

concrete could be protected from the weather for almost three whole weeks after pouring, with any patching work carried out in a heated environment – a huge advantage during extreme winter conditons.

72 climbing cycles

To accommodate the tght constructon schedule, the system was specifcally designed to allow adjustments to the self-climbing formwork, and the 72 climbing cycles of 4.5 m, to be performed quickly. Rigid separaton between the steel-fxing levels and the shutering and climbing operatons meant that once the steel-fxing was completed, the formwork could be retracted and cleaned before the climbing shoes were fted and the climbing rails raised and ted for the next pouring cycle.

Protection from the elements

To protect men and materials from the extreme climate - as low as -30º C in the winter and higher than 30º C in the summer, the self-climbing formwork had to be fully enclosed, complete with a modular, movable roof. The enclosure ensured risk-free operatons, even at extreme heights where the wind forces could be exceptonal. It also allowed the work chamber to be heated so that the concrete can set or be patched.

Paving work begins on bridge and access roads

In September, work started on the asphalt paving of the viaduct section of the bridge to the Russky Island from the

Nazimov Peninsula side.

The first asphalt paving section of the span decks is 400-meters long. Two Vogele asphalt pavers and four Hamm oscillating vibratory rollers are operated simultaneously on the roadway.

The use of modifed bitumen is one of the most important measures aimed at improving durability and strength of the roadway pavement of the bridge to the

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Latest paving technology from Roadtec, Vogele and Hamm is used on the Russky bridge and approaches.

Kroll cranes and Harsco formwork system prove their value.

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