Abstract
In this scientific article, the results of research on the influence of external loading and the own weight of loess soil on the seismic resistance of the soil foundations of structures during oscillation are considered. As the results of experimental studies have shown, at the beginning of dynamic (seismic) impacts, the loading and own weight of the soil has a positive effect on increasing their dynamic stability, and in the future their influence will depend on the duration of the oscillation. With prolonged fluctuations, the effect of the soil's own weight and loading on increasing the dynamic stability of the base decreases, i.e. after a violation of the soil structure, the strength characteristics gradually decrease and this will lead to deformation (compaction) of the soil. Sometimes, with prolonged fluctuations in the strength characteristics of the soil, it tends to zero. At such moments (complete liquefaction of the soil), the soil completely loses its strength and stability. In these cases, the loading and own weight of the soil negatively affects the dynamic stability of the soil, i.e. heavy structures can melt into liquefied soil during prolonged earthquakes.