ABSTRACT
The reliability and durability of all structures, including the ground, depend on the strength and stability of natural and artificially structured soils. In the process of historical development, the construction develops gradually increasing complexity of the geometric configuration of structures and the growth of additional loads transmitted to the foundation soil. It became necessary to assess the reliability of accounting for the strength of different types of soils. In the presence of soft soils, for example, water-saturated loose sand or clay soils, people began using wooden piles; the presence of weak porous loess soils or bulk soil compacted layers required treading by horses and camels. The main criterion for the reliability of structures associated with a soil base is the depth of its inception on a principle: heavy loads–large depth of embedment. The physical meaning of the coefficient of correlation of limit voltages is described as the ultimate resistance of the soil to the deviatory stresses.
