We realized the 3D model of the dike of the fishing port of Sainte-Rose in a logic of patrimonial management. Indeed, this 1000-block ACCROPODE™ I seawall built in the year 2000 had not been monitored by regular inspections until now while it is subjected to strong cyclonic swells.
The port infrastructure manager therefore asked us to carry out a complete state of the structure which will serve as a baseline for future inspections.
To do so, we first performed a high-resolution multibeam bathymetry of the structure and supervised a drone photogrammetric survey performed by a partner company. From these data, the 3D model of the structure was generated in a few days to identify its singularities (broken blocks, risk of block extraction). An inspection dive to control the singularities identified in the 3D model was carried out in addition by our team of professional divers class IB.
The analysis of the condition of the dike was carried out by a partner coastal engineering firm.
The 3D model made in 2021 will be compared to future 3D models made after major swell events to assess block movement and identify if new blocks are broken.
We also performed temporal analyses by updating the 3D model based on new data to observe the evolution of the shells over time following cyclonic swells that occurred during the construction of the structure.
The grouping used this digital twin to facilitate the phase of reception of the work with the project manager and the owner. This model allowed him to prove that some areas considered as problematic by the expert of the project manager were not to be dismantled. In addition, the customer saved on underwater diver inspection costs which were no longer necessary.
In a second phase, we were in charge throughout the year 2022 of carrying out regular bathymetric surveys to control the installation. Data that served as the basis for the regular update of the 3D model.