Abstract
Studies that are presented in this paper were carried out to define the formation criteria of loess soil degradation. Erosion stability analysis of this soil type will be carried out on the basis of its physical and mechanical characteristics. To describe the established relationships between the individual parameters of loess soil, the study uses mathematical model, that is based on experimentally obtained results of soils? physical and mechanical characteristics, From the presented results of geotechnical tests, mathematical models and functional relations between water regime and loess soils? resistant characteristics; indicators of internal erosion were defined as well as the mechanism of this process. Effects of the practical application of found results are also analyzed in this paper.
Highlights
AND OBJECTIVEStudies that preceded the analysis that will be presented in this paper were carried out on soil samples from the area known as “Stiška Valley”
With statistical indicators: determination coefficient R2 = 0.607, correlation coefficient R = -0.73, standard deviation 2,68. Based on these correlations φ = f(w) and c = f(w) it can be concluded that the loess moisture content of w = 10% reaches the maximum value of the internal friction angle of φ = 210 and the minimum value of the internal friction angle of φ = 90 is achieved when the content of humidity is w = 34%
It is interesting to point out information, which is obvious by monitoring the development of the regression curve that even at lower humidity values of w = 10% decline of the internal friction angle value is noticeable
Summary
AND OBJECTIVEStudies that preceded the analysis that will be presented in this paper were carried out on soil samples from the area known as “Stiška Valley”. Geo-statistical analysis of the results of these studies defined the parameters of which depends the intensity of erosion processes. Parameters of the occurrence and intensity of erosion processes in loess soil are parameters of shear strength, internal friction angle and cohesion in the function of humidity and deformability indicators in the function of dry bulk density (Miljanović I., Gajić G., 2011). In addition to tests of physical and mechanical soil properties, deformability was tested as well, as one of the indicators of the origin and development of the soil erosion mechanism. The origin mechanism of erosion is caused by a variety of factors that are affecting the change of: stress state, physical and mechanical properties and water regime, in the erosion engaged soil (Todorović T .; Gajic G., 1997). Degree and form of loess soil erosions is dependent on the variation of these factors
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