Author(s): A. V. Sadovsky; G. I. Bondarenko; S. M. Tichomiro; A. V. Konstantinov
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Abstract: The results of experimental investigations of strength and deformability properties of artificial sea ice in uniaxial compaction conditions and adfreeze strength of sea ice with offshore bed soil are given in this paper. The method for preparing artificial sea ice with the certain structure and salinity was developed. The initial salinity of sea water ranged from 0.9 to 3.2 ppt, the temperature -15°C to -30 °C. Microscopical and crystal-optical investigations showed that two types of sea ice were formed: B1 and B5, according to N. V. Cherepanov’s classification. The samples of sea ice were tested, and rheological parameters were determined in uniaxial unconfined compactions. Empirical dependence of those parameters from the temperature, salinity and time of loading are given. It is shown that adfreeze strength of sea ice and offshore subsea soil decreases with increase of salinity and rise of temperature. The main decrease of adfreeze strength is due to decrease of cohesion. The angle of friction is practically independent. The results of investigations can be used for designations of artificial iselands for offshore polar regions.
Year: 1990