Abstract
The concrete superstructure of piled pier is generally exposed to the severe corrosion environment. In the general periodic inspection, that plays a crucial role in the series of maintenance works of superstructures, the undersides of all concrete members were visually inspected for corrosion of reinforcing bars. Inspectors generally access to the underside by boat, therefore, the tidal and wave conditions have a large influence on performing the visual inspection safely. To ensure the safety and efficiency of inspection works, the authors are working to develop the visual inspection device using semi-submergible-type remotely operated vehicles equipped with upward cameras. This paper reports the demonstration test results of the visual inspection of a superstructure by the developed device. Moreover, the diagnostic imaging support software for a superstructure was proposed to achieve the efficient inspection and diagnosis work.
