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Communication Dans Un Congrès Année : 2018

Innovative methods for waterway inspection: an application to canal tunnels

Résumé

In this contribution, we propose some innovative methods based on sonar, image and/or laser data acquisition to facilitate the inspection of navigable structures, focusing on canal tunnels. We address the problem of 3D reconstruction of fluvial infrastructures on the basis of fthree research studies conducted during a doctoral work. In the first study, we evaluated the capabilities of a sonar system by comparing the 3D reconstruction of a lock from sonar and laser data. The second research axis focused on the implementation of reconstruction algorithms of the whole canal tunnel, i.e.its above water and under water parts. We relied both on photogrammetric techniques for modelling the above water part of the tunnel and on sonar point clouds for reconstructing the underwater model. Sonar data and images were recorded dynamically and simultaneously from a prototype mounted on a boat. In the absence of GPS signal in the tunnel, photogrammetry is used for computing 3D model of the structure and to estimate he boat trajectory in order to register sonar profiles.The last study aimed at evaluating the experimental 3D model of the tunnel. A reference model of the tunnel has been previously built from static sonar and laser acquisitions. Advanced robust algorithms have been implemented to generate the static model. This evaluation results have shown that the 3D model can locate above water elements with a centimetric accuracy and underwater objects with decimetric accuracy. Finally, we also introduced classification algorithms to automatically detect some defects on tunnels linings.The proposed methods are basic building blocks for the construction of a new generation of inspection methods for waterway infrasctructure.

Domaines

Génie civil
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Dates et versions

hal-02142900 , version 1 (28-05-2019)

Identifiants

  • HAL Id : hal-02142900 , version 1

Citer

Emmanuel Moisan, Philippe Foucher, Christophe Heinkelé, Pierre Charbonnier, Pierre Grussenmeyer, et al.. Innovative methods for waterway inspection: an application to canal tunnels. PIANC – World Congress Panama City, Panama 2018, 2018, World Congress Panama City, France. pp.1-18. ⟨hal-02142900⟩
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