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“Viaduc de Millau” Motorway Bridge, France
Highest Bridge Pier Worldwide in Best Architectural Concrete Quality using PERI ACS Self-Climbing Technology
This very spectacular bridge project in southwest France was designed by the English architect, Sir Norman Foster. Eight sections, with lengths of 2 x 204 m and 6 x 342 m, span the River Tarn valley. A total of 7 reinforced concrete pylons of heights between 78 and 245 metres will support the 32 metre wide steel superstructure with its trapezoidalshaped hollow box girders and the steel pylons carrying the stay cables.
The “Viaduc de Millau” is part of the motorway connection between Paris and the Mediterranean area of southern France. The French government granted usage rights for the structure over the next 75 years to the Eiffage construction group and, in return, a warranty for 120 years was agreed to.
PERI''s formwork technology provided a convincing solution. Within a short time, the contractor was able to reach a regular 3-day cycle for one concrete section.
PERI''s formwork and shoring concept
was based on custom steel formwork, which was designed to handle the large areas to be formed as well as producing high quality concrete surface finishes. All external formwork climbed hydraulically and crane-independently from cycle to cycle using ACS self-climbing brackets. The internal formwork was designed to be lifted by crane.
To ensure that the work was carried out on schedule, PERI delivered various formwork and scaffolding systems to the site. Their use was strictly in accordance with the construction schedule on the various piers, which meant use on either different piers or combined together on one.
Altogether, for the double and single piers 6,500 m² of formwork, 196 ACS-R (self-climbing) brackets, 96 SKSF 240 (crane-lifted) brackets and 12 scaffolding modules (special construction) were employed.
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ACS R Self Climbing System
SKS Single Sided Climbing System
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Jean-Pierre Martin
Senior Project Manager
“For this type of construction, the right choice of formwork and climbing systems is the key to success. PERI has proved itself to be an extremely competent partner and the company ´s huge project experience together with its tremendous commitment to the project has contributed greatly to the fact that we are ahead of schedule.”
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PERI Handbook 2005 Formwork
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