THE SEISMIC THRESHOLD AS A CRITERION FOR THE STABILITY OF THE STRUCTURE OF LOESS SOILS

Loess soils are widely used in Kazakhstan and their engineering and geological surveys are devoted to numerous studies. As a consequence of this phenomenon - the development of deformations of buildings and structures due to uneven precipitation of the loess strata. The report describes the results of experimental studies conducted by the authors on the elucidation of the nature of the seismic subsidence structure of the structure of moistened loess during their shaking. Based on the reasoning of the physical processes in the loess stratum under oscillation conditions, the seismic subsidence threshold is directly dependent on the resistance to soil shear. Based on the studies performed, a formula for calculating the shear resistance (strength) of loess soil is proposed. Here the seismic subsidence deformation of the soil strata is determined. Strength, stability and durability of buildings and structures erected on such soils, largely depends on the complete exclusion of the possibility of soaking the base during operation.

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