Abstract
In recent years, despite the negative impact of global warming on permafrost, there has been an increase in the length of railways in the Arctic zone. The bearing capacity of thawing permafrost soils at the base of the roadbed is reduced, especially under the influence of increased vibrodynamic load, therefore, the study of their strength characteristics is becoming increasingly relevant. The article examines the adhesion and the angle of internal friction of thawing soil, and presents the results of triaxial tests using the method of orthogonal experiments. The patterns of changes in the strength characteristics of thawing soil under the influence of such factors as the initial temperature of soil samples, humidity and the load stage are determined. Based on the method of dispersion analysis (ANOVA), the influence of initial temperature of soil samples, humidity and the load stage on the strength characteristics of the soil was studied. Based on the results of triaxial tests, the regression equations of the dynamic coupling and the dynamic angle of internal friction were obtained. The results of the research can be used to calculate the bearing capacity of thawing permafrost soils at the base of the roadbed.
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