Unique cable-stayed bridge accurately and safely formed
The 515 m long cable-stayed bridge connects the Bretonic mainland in the northwest of France with the Crozon peninsula. One special feature is the fact that the steel cable-stay supported superstructure is curved in plan and the unique geometry of the pylons form the Greek letter λ (Lambda). The main span is 285 m and the the two pylons each reach a height of around 100 m.
On basis of ACS self climbing technology and the VARIO GT 24 of girder wall formwork system, a solution was developed which, on the one hand, worked crane-independently in all weathers and, on the other, also provided maximum safety. Because in addition to the complicated pylon geometry, high safety requirements were also to be maintained. With help of the ACS climbing device, all four pier sides could be climbed together at the same time without intermediate anchoring. As a result, the working platforms were secured at all times without requiring any additional measures.
The flexibility of the VARIO system allowed the construction crew site to accurately adapt the wall formwork to the continuously changing geometry. This led to smooth and trouble-free construction progress and perfect concrete results.
"With the ACS and VARIO solution, it was possible for us to realize the changing forms of the architecturally challenging
bridge pylons. PERI engineers also provided our construction site team with great support during the project.”
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