Results experimantal study of acoustic properties of saturated sand in the temperature range –20 — +20 ᵒC
https://doi.org/10.33623/0579-9406-2020-2-89-98
Abstract
In this article we discuss the results of ultrasonic measurements using p and s waves on a sample of full water–saturated sand in the temperature range –20 ᵒC — + 20 ᵒC. The results are: dependence of kinematic and dynamic parameters of the ultrasonic signal on temperature and elastic waves attenuation parameter. We propose method to calculate the attenuation parameter of p and s waves at ultrasonic frequencies for a wide temperature range. The values of the attenuation parameter at negative and positive temperatures differ by 40–50 times for p waves and by 2 orders of magnitude for s waves. A smooth change in the attenuation parameter from –5 ᵒC (–10 C) to 0 ᵒC for p (s) waves was observed. The attenuation affecting the dynamic parameters reacts faster to the thawing of frozen ground than the waves velocity, which is most relevant in the case of plastic–frozen rocks and at temperatures close to 0.
About the Authors
M. S. Sudakova
Lomonosov Moscow State University;
Earth Cryosphere Institute, Tyumen Scientific Centre SB RAS
Russian Federation
Russian Federation
119991, GSP-1, Leninskiye Gory, 1;
625026, Tyumen region, Tyumen, Malygina st., 86
M. L. Vladov
Lomonosov Moscow State University
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
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Review
For citations:
Sudakova M.S., Vladov M.L. Results experimantal study of acoustic properties of saturated sand in the temperature range –20 — +20 ᵒC. Moscow University Bulletin. Series 4. Geology. 2020;(2):89-98. (In Russ.) https://doi.org/10.33623/0579-9406-2020-2-89-98
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