ASSESSMENT OF COEFFICIENT OF STABILITY MARGIN OF SMOOTH LOADED SLOPE ON THE BASIS OF THE ANALYSIS OF STRESS STATE OF SOIL MASS AT VARIOUS COEFFICIENT VALUES OF LATERAL SOIL PRESSURE
On the basis of the analysis of stress state of soil mass the influence of coefficient value of lateral soil pressure on coefficient value of stability margin of smooth loaded slope is investigated. It is established that for slopes with various geometrical parameters composed by cohesive soil with wide range of changes of physical and mechanical properties, exists (for each slope its own one) minimum value of intensity of evenly distributed load and when this load is exceeded the size of coefficient of lateral soil pressure does not have a significant influence on its stability margin. It is stated that in certain cases the difference of numerical values of the external load intensity, corresponding to given beforehand coefficient of stability margin, can increase at rise of lateral pressure coefficient from 0,4 to 0,95 by 30 % and more. On this basis the conclusion about the necessity to consider the value of lateral pressure coefficient as variable calculated parameter at certain values of geometrical characteristics of a slope, the external load intensity and physical and mechanical properties of soil.