Topic: Non-invasive diagnosis with underwater GPR surveys
The work aimed to assess the substrate conditions under forebay and afterbay slabs at the Wloclawek hydroelectric power plant, to identify and locate potential zones of discontinuity, ground heterogeneity, or voids affecting the subsurface to a depth of about 2.0 m. For this purpose, we used a specially designed bathyscaphe in which was placed the GPR antenna with a frequency of 250 MHz. Bathyscaphe was fixed to a watercraft and guided by a diver as deep as possible over the surface of the slabs. Thanks to the diver, it was maintained with continuity of connectivity, allowing fast adjustments of the measurement set.
