The Influence of the Frequency of Dynamic Action on the Violation of the Structure and Compaction of Loess Soils

Abstract

This scientific article presents mainly the results of experimental studies on the influence of the frequency of dynamic (seismic) vibrations on the violation of the structure and deformability (compactness) of moistened loess soils. The research conducted by us and other specialists showed that with an increase in the intensity (accelerations) of vibrations, the strength characteristics of moistened loess and other weak cohesive soils decrease (mainly due to a decrease in connectivity) and this leads to an increase in deformation (compaction) of the soil. It should be noted here that the most significant influence on the destruction of the structure and the increase in compaction of the soil is played by the frequency of vibrations. Analyses of the consequences of many devastating earthquakes show that high-frequency earthquakes are the most dangerous for moistened loess and other subsidence soils, from the point of view of violation of dynamic stability.