Water Retaining Structures
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Lurberria Dam, St Pée Sur Nivelle, France
Flexibility and safety in dam construction
The dam in the French Pyrenees is 320 m long and 22 m high. Thus, up to 6 million cubic metres of water from the River Nivelle can be retained on an area of 73 hectares which also contributes to the flood protection measures. The gravity dam was constructed using the RCC process (Roller Compacted Concrete). For adapting to the different building geometries, the PERI formwork and scaffolding solution was based on flexible and modular systems. As a result, the strict safety regulations could be followed as well as guaranteeing problem- free construction progress. In concreting cycle heights of 3.30 m, TRIO panel formwork together with SKS 180 climbing brackets were climbed from cycle to cycle.
The SKS system has been designed for single- sided as well as forward and reverse-inclined use with high concreting loads. For constructing the the massive 6 m high bottom plate, TRIO 330 and TRIO 270 were combined and the loads safely transferred via SB brace frames to the ground. Likewise, the return walls of the 27 m high discharge facility could be efficiently formed with TRIO; support was provided here with CB 240 climbing brackets. Four working levels provided safe conditions for shuttering and striking operations with the 5,35 m standard cycle height as well as risk-free concreting work, which resulted in fast construction progress. In the area at the top of the dam, SRS column elements mounted on the TRIO wall formwork at the front ensured an accurately constructed rounded finish.
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| PERI Systems In Use |
SKS Single Sided Climbing System
TRIO 330
CB Climbing System
TRIO
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Gilbert Dublanc
Site Manager
“We greatly appreciate the close cooperation with PERI. The solutions for all our projects are convincing and for the realization
of the different structural components, everything fits together exactly.”
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Handbook 2011
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