Inspection of a port dock: Results obtained from 4410 aerial photographs captured by the Sentinel company. Post-processing and image analysis performed by Drones Imaging.
The study of pillar verticality at a port dock using drones represents a significant advancement in the maintenance of port infrastructure. Docks supported by piles, made of reinforced concrete or steel, play a crucial role in the maritime sector. They are particularly well-suited for areas where the natural soil quality is poor but a more load-bearing soil layer exists at a reasonable depth. These piles are designed to withstand the stresses generated by ship loading, unloading, docking, and mooring operations.
The primary objective of the pillar verticality study is to ensure that these structural elements do not undergo excessive stresses over time, which could lead to undesirable movements across the entire dock. To meet this requirement, successive images of the vertical section of the dock, including load-bearing pillars, were captured using drones by the company SENTINEL. These images were then processed by SAS Drones Imaging to create a three-dimensional model of the dock using Agisoft Metashape photogrammetry software.
Subsequently, the analysis of the obtained 3D model was crucial in assessing the verticality of each pillar. This evaluation was based on two contour lines spaced at 0.8 meters vertically (z-axis). Thus, examining the concentricity of these two lines allowed determining whether the pillar was perfectly vertical, and if not, calculating its inclination through the measurement of concentric offset.
This drone-based monitoring approach offers numerous advantages. It enables precise and regular assessment of the pillar’s condition, helping to prevent potential deterioration. Furthermore, it reduces costs and disruptions associated with traditional inspection methods, which may require direct access to the pillars, sometimes proving difficult or costly. In summary, this verticality study represents a significant technological advancement in ensuring the stability and safety of port docks while optimizing their maintenance and durability.