Grand Port Maritime de La Rochelle analyses damage to the Chef de Baie seawall.
After a drone inspection in 2019, the Grand Port Maritime de La Rochelle (GPMLR) commissioned the analysis of this protective rockfill structure for port facilities:
- Drone RTK data acquisition,
- Production of the digital twin of this 15,000m² rockfill embankment,
- Characterisation of changes since 2019.
Automation of the process, from 3D modelling to surveying of changes, provided decision-making information in record time.
The Atlantic winter climate is easily a match for the Lorraine snow!
Rockfill seawalls were previously mainly monitored empirically (comparing photos taken from the sea, inspections from the top of the seawall, etc.). With the service provided by A2D, we now have a 3D model of the seawall that instantly tells us its slope at any location, compares rock movements between different photogrammetric surveys (by drone, bathymetry or other means), as well as offering other features such as displaying photos at a requested point. This tool is also secure for monitoring structures showing signs of ageing, such as rock settling and sliding at the base of the seawall. In the event of a storm, a new drone pass quickly allows factual observation of the structure’s movements and scheduling of remedial work if necessary.
