The seasonally frozen ground has been focused on as research topics such as the frost heaving under the asphalt road rather than the permafrost ground due to the latitudinal location of Korea. However, the recent construction of the second Korean Antarctic research station, the Jangbogo station and the participation on the development of the natural gas pipeline in Russia arouse the research interests on the behavior of the permafrost ground. At the design process of the geotechnical structures on the permafrost ground, the evaluation of the mechanical characteristics of frozen soil is very important. In the laboratory tests, it is crucial to understand the effects of testing conditions such as loading rate and temperature on the mechanical behavior of frozen soils. Therefore, unconfined compression tests are performed to evaluate the loading rate effects on the mechanical characteristics of frozen granular soils. Based on the experimental results, the loading rate affects both the strength and deformation characteristics of the frozen soils. The ASTM standards on the loading rate of the frozen sands are fast enough for the strength evaluations but not for the stiffness evaluations. Furthermore, the loading rate effects are evaluated on the bearing capacity and deformation of pile installed on the permafrost via numerical analyses with experimental results.
Loading rate effects on strength and stiffness of frozen sands
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 20 , 1 ; 208-215
2016-01-01
8 pages
Article (Journal)
Electronic Resource
English
Loading rate effects on strength and stiffness of frozen sands
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