ИСТИНА

In the first year of soil construction's functioning rapid changes of soil’s properties, including solid phase, which is traditionally considered as the most stable part of the soil, happen. Such rapid changes from the position of soil evolution are caused by the fact that any mechanical impact on the soil, especially associated with movement of soil layers, leads to the fact that the soil is trying to bring their properties into balance with the surrounding environment. The inclusion of these specifics is especially important during the creating of sustainable soil construction for the purposes of greening. Soil constructions are subjected rapid degradation, especially those, which are situated in conditions of the city, where anthropogenic and technogenic loads are high. The aim of this work was investigating of main physical and chemical properties of soil constructions and their changes in the process of functioning. In this regard model soil constructions with different structure were created: 1) ground (horizon A arable), 2) layered (horizon A arable-peat-sand), 3) mixed (the same components, as in layered). The main properties (ρs, ρb, ε, S, granulometric composition, rheological properties) were studied and monitoring of temperature regime was done. The analysis of soil properties revealed an increase in the density of the solid phase (ρs) on the background of decreasing the content of organic substances, the enrichment of fine fractions. This is particularly noticeable in the mixed variant and in the sandy layer, located under horizons of A arable and peat. Distinct changes were fixed in the rheological properties of soil, which showed the degree of transformation microstructures in the process of soil construction’s functioning.