Influence of Seismic Impacts on Foundation Beds Composed of Weak Soils

In many seismically active regions of Central Asia, weak water-saturated sandy and silty-clayed soils are widely spread; industrial and civil facilities of various purposes are built and operated on them. The operating experience, macro-seismic examinations of earthquake consequences and the results of laboratory and field investigations show that the strength and deformational characteristics of soils under seismic impact deteriorate, which means they should be monitored and the soil-bed properties should be evaluated and calculated. In order to decrease the influence of seismic impacts and improve the seismic resistance of structures and facilities, the construction practice provides for a number of methods aimed at improvement of soils properties; pile foundations are also used for such purposes. The present article summarizes on the results of field experimental investigations of the influence of seismic loads simulated by seismic-explosive impacts on the state of natural and artificial basements, as well the influence of pile foundations on weak water-saturated loess soils.