| Title |
Evaluation of Long-Term Deformation Prediction Model on Frozen Sand Considering Fine Contents |
| Authors |
황범식(Hwang, Bumsik) ; 채덕호(Chae, Deokho) ; 조완제(Cho, Wanjei) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.1.0093 |
| Keywords |
동토;크리프 거동;세립분 함량 Frozen soils;Creep behavior;Fine contents;Tertiary creep model |
| Abstract |
Many countries are interested in the development of the Antarctic area because of the abundant resources and living things of high research value. Korea completed the second Antarctic research station in 2014 and spurring the development of the Antarctic area by constructing runway for the airplanes and a third Antarctic research station. However, frozen soils, unlike typical soils, are sensitive to creep behavior due to the influence of ice and unfrozen water. The creep tests for evaluating creep behaviors on the frozen soils require expensive laboratory equipments and large amount of time. Thus, various empirical models had been developed to describe the unconfined compressive creep behavior of frozen soils. In this study, new analytical creep model on frozen sands was proposed by modifying Ting's Tertiary creep model with a new parameter considering fine contents. Thus, the unconfined compressive creep tests were conducted with the frozen specimens of dense Jumoonjin sand with fine contents of 0, 5, 10 and 15% under various loads at -$5^{\circ}C$, -$10^{\circ}C$ and -$15^{\circ}C$. Consequently, the modified Tertiary creep model with a new parameter for fine contents are not enough for the description of the acutal creep behavior of the frozen sand and new framework should be developed. |