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Motorway Bridge D1, Považská Bystrica, Slovakia
Cost-effective forming and shoring of bridges with PERI modular systems
With the “Centrum“ D1 motorway junction, a 767-metre long bridge structure, the cross-sections as well as its longitudinal and lateral inclinations change continuously. During construction, single and twin-spaced hollow box cross-sections with variable superstructure widths were to be formed whereby two separate superstructures merged to form one distinct bridge structure. Planning and execution were based on rentable modular construction systems: construction of the hollow box cross-sections for the superstructure was carried out using PERI UP falsework, the external web formwork and cantilever formwork were created by means of variable raised formwork units using VARIOKIT system components.
PERI UP supporting scaffold transferred the vertical and horizontal loads from a height of over 15 m safely into the ground, and the required access means was also integrated. Through its modular structure and metric grid arrangement, the load-bearing system could be optimally adapted to deal with all forces. With 150, 75 and 25 cm standards, the individual loadbearing capacities of 40 kN per leg were combined to deal with higher loads - and virtually multiplied at will. Even for concentrated load points as found in the web areas, several standards could be bundled together using system components.
The hollow box superstructure was realised in two casting segments with the help of VARIOKIT raised formwork units. In the first cycle, the bottom plate complete with webs were formed and concreted whilst the carriageway slab and cantilevers were constructed in the second cycle. Using hinged and friction-locked connections with articulated walers and universal couplings, the latticed framework consisting of GT 24 formwork girders, SRU steel walers and SLS heavy-duty spindles could be accurately adapted to the structure´s geometry and falsework.
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PERI UP Rosett Shear Frame Arrangement
Raised Formwork Units
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Ľuboš Šalváry
Site Manager
“We have been working together with PERI for many years now, and once again we have not been disappointed. For each bridge section, we received the right formwork and scaffolding solution.”
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PERI Press Release 03/2009
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