Doka’s fine form

Doka’s SKE50 automatic climbing formwork are being used on two suspension towers for a new multi-lane cable-stayed bridge alongside an older viaduct in Zaporozhye, south-east Ukraine. On completion, this large-scale infrastructure project is set to massively reduce the traffic burden on the existing bridge and significantly improve the daily traffic situation at what is a major river crossing. The two separate roadway slabs are cable-stayed off twin H-shaped suspension towers 150metres high. Lead project co
June 18, 2012 Read time: 3 mins
Doka formwork is being used on two suspension towers for the new multi-lane cable-stayed bridge in Zaporozhye, Ukraine
203 Doka’s SKE50 automatic climbing formwork are being used on two suspension towers for a new multi-lane cable-stayed bridge alongside an older viaduct in Zaporozhye, south-east Ukraine.

On completion, this large-scale infrastructure project is set to massively reduce the traffic burden on the existing bridge and significantly improve the daily traffic situation at what is a major river crossing. The two separate roadway slabs are cable-stayed off twin H-shaped suspension towers 150metres high. Lead project contractor Mostobud are said to have chosen Doka for its smooth cooperation on previous builds, topped by what it saw as the firm’s acclaimed competence on technologically challenging automatic climbing projects.

For the sake of strength, the two suspension towers are of solid cross-section to the full height of the first two concreting sections. The section is hollow from the 11metre level up. Per tower leg there are eight SKE50 automatic climbers carrying 100 m² of Doka Top 50 beam formwork, plus a set of Doka shaft formwork, repositioned with a single lift of the crane.

“The Doka formwork has proved the perfect solution for building the two suspension towers quickly and economically,” says project manager Volodymyr Klymenko.

Up to where the cross-beam ties in at the sixth concreting section, the legs of the towers are inclined at an angle of 5.3° off the vertical. Above that beam level, the tower legs are climbed at an angle of 5.6°. The polygonal cross-section tapers 5cms per concreting section. Aggregated over the total of 40 concreting sections, that equates to a difference of 2metres between the first and last sections in the towers’ tapering cross-section.

The hollow-section cross-beam is 6metres high and 20metres long to carry the roadway slab and is formed with Doka Top 50 large area formwork. This formwork is supported at a height of around 25metres by easy-to-use, easily erected Staxo 100 load-bearing towers. The integrated ladderways and a multiplicity of attachment options for personal protective equipment are said to enable the falsework towers to be erected rapidly, yet also in total safety. Starting from the top surface of the cross-beam, the automatic climbing platforms are set to the new angle of 5.6° from the vertical. A catwalk, suspended from the self-climbing system, forms another connecting link between the two legs of the tower. The walkway means that per tower, one passenger hoist is enough to bring the crew to their workplaces. The catwalk is said to be a special solution developed specifically for the build by Doka.
Road Structures

For more information on companies in this article

Related Content

  • Austria's first PPP project takes shape
    July 31, 2012
    North of the Austrian capital Vienna, one of the region's biggest transport infrastructure projects for decades is currently under construction, the A5 Nordautobahn. This will give the Greater Vienna region its first-ever high-capacity link to the Czech motorway and arterial road network, greatly easing congestion on the old main road. In the first phase of construction, 22.7km of motorway are to be built. Work on the second section, all the way through to the Czech border, is to start in 2010. The A5 Norda
    Read More
  • São Paulo's landmark bridge construction
    February 21, 2012
    To improve access from the east to São Paulo city centre, main contractor Construbase Engenharia is building a road complex comprising three viaducts and access ramps. The greatest challenge in Brazil's largest city is the showpiece Padre Adelino viaduct, a 122m long single-arch, single-span, cable-stayed concrete bridge moulded in situ with a parabola-shaped arch and a single-cell post-tensioned cantilever caisson
    Read More
  • Doka’s Voest Bridge bypass project
    February 10, 2020
    The Voest Bridge over the Danube River is part of the A7 Mühlkreis Autobahn through Linz, Austria, is 40 years. Two bypass bridges are being constructed alongside the existing cable-stayed bridge as part of the client ASFINAG’s strategy to boost traffic capacity - around 100,000 vehicles cross the old bridge each day.
    Read More
  • Emergent markets key for formwork sector growth
    May 21, 2014
    Central and south-east Europe are hotbeds for new highway infrastructure projects utilising cutting-edge formwork solutions, while a number of leading formwork manufacturers are also looking at emergent markets for growth. Guy Woodford reports Travelling between Hungary’s capital Budapest and Southern Dalmatia now takes less time thanks to the Pan-European Corridor Vc – European route 73. Numerous tunnels and bridges are erected along the 397km stretch of the European route 73 through Bosnia owing to the
    Read More

Highlighted Content