2023 Volume 79 Issue 18 Article ID: 23-18003
In recent years, many cavities have been discovered at the back sides of reclaimed sea-walls in harbors and if expansion is progressed without detection, those cavities may result in serious accidents eventually. Generally, the causes of those cavities are varied, ranging from is-sues with the structural and material difference of seawall, natural environmental background and construction history of each structure.
Although Ground-Penetrating Radar (GPR) and scoping surveys are common techniques to detect those cavities, these conventional methods require specialized knowledge to confirm the existence of cavities correctly and cannot provide crucial information of the internal conditions which help to determine the underlying causes of the cavities.
To address these challenges, the authors developed a 3D modeling system that install a small gimbal camera and cloud computing. Then, our field experiments with this system confirmed that it is capable of acquiring detailed images and 3D profiles of the cavity interior, allowing for a better understanding of the process of cavities.
