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STRUCTURAL THEORY 1
GENERAL INFORMATION: LOCATION: Millau, France USE: Motorway Bridge STATUS: In Use COST: € 394,000,000 HEIGHT: 343 meters LENGTH: 2460 meters WIDTH: 32.05 meters WEIGHT: 290,000 tons DURATION OF WORKS: 38 months AWARDS: IABSE Outstanding Structure Award PROJECT TEAMS ARCHITECTURAL: Norman Foster STRUCTURAL: Michel Virlogeux MANAGEMENT: Eiffage Concessions CONSTRUCTION:
• Eiffage TP (Concrete), • Eiffel Company(Steel Roadway), • Enerpac Company (Hydraulic Supports), • Appia (Asphalt Coating), • Forcium (Electrical Installations)
The Millau Viaduct is the world’s tallest and longest bridge constructed as a cable-stay design that began construction in October of 2001. It is a bridge that marveled the world with new inventions and techniques in order to make this incredible structure exist.
ENGINEERING ASPECTS
ü Transportation Engineers developed a way to give solution for the extreme traffic Millau is experiencing.
ü Geotechnical Engineers have to consider the route chosen to be feasible but then, they encountered rock cavities that damaged the limestones which will eventually cause serious landslides. They stabilized the slopes to prevent the repeat.
ü Use of only one set of cables down the center of the bridge instead of the usual two along the sides of the bridge
ü Designed the bridge to have its pylons to split into two instead of having a solid pylon on the way up the bridge. The reasoning behind the split pylon design is not only for aesthetic purposes but also for the purpose of contraction and expansion.
ü Aerodynamic underside to the bridge which actually looks like an airplane wing turned bottom side up. This allows the wind to cut around the bridge in a smooth manner lowering the chance of twisting. To protect the drivers they installed elegant curved wind break grates down the length of the bridge which take the brunt of the force from the wind and pushes it up and away from the roadway.
ü Use of pre-built materials coupled with self moving forms for the pylons.
ü GPS systems were used to assure that pylons would not be off their mark.
ü Use of Hydraulic Pushing System to put the deck in place.
REFERENCES/ACKNOWLEDGMENTS: • Google Sites. Project Millau Viaduct.
Retrieved from https://sites.google.com/site/projectmillauviaduct/
• Structurae. Millau Viaduct. Retrieved from https://structurae.net/structures/millau-viaduct
• Images from Google Images
Pylons
Aerodynamic Underside
GPS Systems
Hydraulic Launchers