Determination of Ice Thickness Using Standing Waves

Fedin, Konstantin; Kolesnikov, Yu. I.; Ngomayezwe, L.

doi:10.1007/978-3-030-53521-6_3

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2021

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“…This method has already been applied earlier, for example, during physical modeling and field experiments to determine voids in soil sediments, inspect the road surface and determine the thickness of ice Fedin 2015, 2018;Fedin et al 2019). The method is reduced to the registration of acoustic noises on the surface of the object under study and the accumulation of amplitude spectra of a large number of noise records.…”

Section: Methodsmentioning

confidence: 99%

Determination of Cavities Under the Concrete Slab Anchoring the Upper Slopes of the Novosibirsk Hydroelectric Power Station Using Standing Waves

2021

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The possibility of a resonant method for detecting defects in the slab anchoring the embankment dams and levee slopes, using Novosibirsk hydroelectric power station as the study object is shown. The accumulation of amplitude spectra of acoustic noise recordings makes it possible to determine the frequencies of the first few modes of standing compressional waves generated by noise in concrete slab fasteners. A sharp increase in the frequency of the lowest mode of standing waves is an indicator of the appearance of voids or De compaction of the base soils under the slabs.

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Section: Methodsmentioning

confidence: 99%