The article is devoted to the loss in stability of loess soils and their transition to the liquefaction condition under strong seismic impact. The studies were conducted based on the physical and mechanical theory of dynamic disturbance of the structure of cohesive soils. The results of experiments on the study of changes in soil shear resistance under conditions of intense vibration are presented. Formulas are given to determine the values of dynamic pressure and soil connectivity in the prolonged impact of dynamic load.
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