Год издания: 2021

Using the example of the Novosibirsk hydroelectric power station, we demonstrate the possibility of using the elastic standing wave method to identify voids under the slopes of the dam embankment slabs and the levee hydraulic structures. The accumulation of amplitude spectra of acoustic noise recordings allows us to determine the frequencies of the first few modes of standing compression-tension waves generated by noise in concrete embankment slab. A twofold frequency increase of the lowest mode of standing waves is an indicator of the appearance of voids under the plates lying on a more rigid base. Areal noise measurements on the surface of the slabs make it possible to outline the voids formed under them.