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D5 motorway bridge near Pilsen, Czech Republic
PERI VARIO for complicated pier geometry and perfect concrete surfaces
D5 motorway bridge near Pilsen, Czech Republic
On average, around 4,500 trucks drive through the centre of Pilsen every day on their way to Germany which has made life extremely difficult for the local population. For this reason, public expectations have been very high in the wait for a new city by-pass. After years of dispute between the urban authorities on the one hand and the smaller boroughs and ecologists on the other hand, the last stage of the Pilsen motorway relief road project is now taking shape.
Geographical conditions required the construction of a bridge over the valley and the River Uhlava following on after a tunnel which leads the road through the Valik Hill. In each driving direction, eight piers up to 21.60 m high had to be erected – the main features here were the complicated head design in form of specially-constructed pyramidal stubs together with architectural concrete surfaces with a mix of board structure and smooth finishes.
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| PERI system, brukt på byggeplassen |
VARIO GT 24
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A maximum possible number of rentable PERI standard components allowed the experienced site crews used by the contractors, Max Bögl and Krysl KG (Czech Republic), to efficiently carry out construction of the bridge piers. By using PERI VARIO girder wall formwork on KGF climbing brackets, considerable time savings could be achieved during moving from cycle to cycle. The formwork and the climbing brackets could be moved together in one lift whereby required crane time could be reduced. Before the moving process begins, the formwork is retracted 75 cm by means of an integrated formwork carriage and then cleaned whilst on the climbing brackets. Subsequently, the complete unit – formwork and scaffolding – is lifted by crane to the next cycle and re-positioned, thus saving time. |
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For the construction of the complicated pier head geometry, too, PERI engineers in close cooperation with the contractors found an efficient solution. Through a detailed planning process and accurate on-site assembly, specially-made boxed elements positioned on PERI VARIO girder wall formwork were doubled up. This meant that the required pier head form could be accurately pre-determined. The approx. 22-tonne loads from the pier head formwork, the weight of the reinforcement and the concrete pressure could be safely transferred via the horizontally anchored PERI brace frames and climbing cones into the pier shaft. Due to the accurate positioning of the box elements, each with the appropriate formlining, the required high-quality concrete surfaces could be achieved much to the satisfaction of the client and contractors. |
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| Contractor: |
Max Bögl and Krysl KG, Czech Republic |
| Field Service: |
PERI Czech Republic |
| Sales Engineer: |
Dipl. Ing. Karel Vitek |
| Design Engineer: |
Irena Vitochova |
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Avdeling:
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PERI spol. s r.o., Czech Republic
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Press Release, February 2005
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