Physical and Mechanical Characteristics of Sea Ice in the Kara and Laptev Seas
- Sergey M. Kovalev (Arctic and Antarctic Research Institute) | Victor N. Smirnov (Arctic and Antarctic Research Institute) | Vladimir A. Borodkin (Arctic and Antarctic Research Institute) | Aleksandr I. Shushlebin (Arctic and Antarctic Research Institute) | Nikolay V. Kolabutin (Arctic and Antarctic Research Institute) | Konstantin Alexandrovich Kornishin (Rosneft Oil Company) | Yaroslav Olegovich Efimov (Arctic Research Centre) | Petr Alexandrovich Tarasov (Arctic Research Centre) | Dmitry Alexandrovich Volodin (IK Sibintek LLC)
- Document ID
- International Society of Offshore and Polar Engineers
- International Journal of Offshore and Polar Engineering
- Publication Date
- December 2019
- Document Type
- Journal Paper
- 369 - 374
- 2019. The International Society of Offshore and Polar Engineers
- physical properties, structure, uniaxial compression, comparison coefficient, local strength, Borehole jack
- 3 in the last 30 days
- 3 since 2007
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In the spring period of 2013–2017, the Russian Arctic and Antarctic Research Institute, in cooperation with the Rosneft Oil Company and the Arctic Research Centre, organized four complex expeditions in the Kara and Laptev Seas to study the physical and mechanical properties of sea ice (Fig. 1). Obtained data shows that for level ice with an increase in thickness, its mean temperature, salinity, and density decrease, but mean values of local strength and strength of ice samples at uniaxial compression increase. Failure zones of different intensity developed after the indenter penetration are studied. A range of comparison coefficients for local strength and uniaxial compression strength is updated.
Complex expeditions in the Kara and Laptev Seas were conducted in a period of maximum ice thickness onboard the nuclear icebreaker “Yamal,” with an onboard MI-8 helicopter. The main task was to evaluate the sea ice’s main physical (temperature, salinity, density, texture) and mechanical properties. Ice structures of different age gradations were studied with both borehole indenters and sample coring. A comparison of strength at the uniaxial compression of cylindrical ice samples drilled parallel to the ice cover surface, with the ice strength in conditions of uniform compression (local strength), was performed.
Measurements of ice temperature, salinity, and density, together with texture description, were performed at ice stations on two or more points. Sample coring was made with the core barrel “Kovacs Enterprise” with an internal diameter of 141 mm. Cores for texture analysis were oriented to cardinal directions with a magnetic compass. Taking into account the proximity of coring points, the texture pattern and physical properties of ice were considered as relative to the same ice.
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