One in four lanes really damaged
• Origins. – This bridge dates from 1953. It is a metal structure of the lateral beam type, on which reinforced concrete slabs rest. In particular, we monitor signs of infiltration, corrosion, oxidation and aging in reinforced concrete.
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• The observation. – The experts visited on November 20. The greatest damage is on the left bank span, on the Richemont side. The concrete and steel are very damaged. The other spans are less worrying.
Gantry cranes against trucks
• The works. – The four hatches will be repaired to allow the exclusive and secure circulation of light vehicles (LV) before the end of the year. A filtering device will be installed at both ends of the bridge. The work will consist of planing the surface of the asphalt at the level of the access hatches, installing a reinforced metal plate, and covering it with concrete with a peripheral bituminous joint to ensure a good connection with the existing wearing course. This work will be carried out by the companies Berthold and Jean Lefèbvre, starting this Monday, December 2. They should last all week. Then, gauge limitation gantries will be installed on December 9 and 10 to restrict access to heavy goods vehicles.
• Reopening. – It should take place on December 12, for light vehicles only. Heavy goods vehicles will be dependent on the results of complementary expertise on steel and concrete.
