Viaduct crossing the Loiret: A71 – Detailed Inspection by drone

The viaduct crossing the Loiret is a prestressed concrete bridge carrying the A71 to the PR 102. It crosses The Loiret, linking the municipalities of Olivet and Saint-Pryvé-SaintMesmin. It is 146 meters long. Given the very heavy operating constraints, Cofiroute wished perform the detailed inspection of the structure of the viaduct crossing the Loiret by drone.


Client & Project Manager

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For the processing of data retrieved during our intervention, we used our internal software, Dia-Map V2 ©. It allows us a unique approach to the structure pinning all the collected photos and pathologies mapped on a three-dimensional model of the structure.

  • Box Girder Bridge
  • Length: 146 meters
  • Width : 14 meters

Mission of Diades

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Our task was to perform a monitoring of pathologies on the lateral surfaces and the underside of the entire structure:

  • The outer surfaces of the two cantilever boxes and support by drone, the interior surfaces by foot.