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Oparno Motorway Bridge, Czech Republic
Comprehensive system solution for arched bridges
The D8 motorway crosses the Oparno Valley, located in the Bohemian area of the Czech Republic, on two parallel positioned arched bridges at a height of 50 m. In a joint Czech-German collaboration, PERI provided an all-in-one comprehensive and cost-effective solution based on a standardised modular system. Using mostly rentable system components from the VARIOKIT engineering construction kit, RCS rail climbing system as well as PERI UP modular scaffold, piers, arched supporting structures and superstructures could be economically built - optimally adapted to the individual project requirements.
The reinforced concrete arches have a span of 135 metres, with a total length between both abutments respectively of 258 m. Using the cantilevered construction method, the arches were formed and concreted in five to six-metre long sections with the help of two customised formwork and scaffolding units. Hydraulic units allowed the moving procedure of the arch cantilever construction to be carried out, mostly without crane support, regardless of the weather. The VARIOKIT engineering construction kit formed the basis of the span-wise construction of the double-webbed T-beam cross-sections. The 53 metre-long formwork carriage and the formwork system itself were optimally configured to one other and mobile hydraulic devices allowed the entire striking and shuttering procedures to take place as conveniently and simply as possible.
During the construction of the piers, the RCS rail climbing system served as climbing formwork scaffold for supporting the VARIO girder wall formwork. The mobile RCS self-climbing concept minimized the costs incurred here for crane-independent climbing. With just one system, the extremely versatile PERI UP Rosett modular scaffold solved numerous construction tasks: for reaching and assembling the temporary bracing for the arched supporting structure, stairs and access ladders as well as working platforms were used; in addition, the PERI UP protective roof construction ensured that rail services in the valley continued to operate as usual during the project without any negative effects on building progress.
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Launched Traveller
PERI UP Rosett
RCS C Climbing Formwork
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Roman Šimáček
Site Manager
“The very strict environmental protection regulations meant that a technically challenging bridge construction was necessary. PERI provided us with a perfect customised, economical and safe solution for the piers and arched construction along with the superstructure.”
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PERI Press Release August 2009
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