ИНЖЕНЕРНО-ГЕОЛОГИЧЕСКОЕ МОДЕЛИРОВАНИЕ ПРОСТРАНСТВЕННОЙ НЕОДНОРОДНОСТИ ГРУНТОВ

Abstract

The article discusses the problem of soil properties heterogeneity in the massif and possible ways of estimating the regularities of its manifestation by means of three-dimensional numerical modeling of spatial fields of the studied parameters within the framework of geostatistical approach are considered. The results of such modeling are analyzed on the example of a fairly diverse in composition and structure soil massif. It is demonstrated that the structure of geological parameter fields a) differs for different stratigraphic-genetic complexes of soils and rocks, b) can be simpler than the combination of engineering-geological units, c) the proposed approach is able to identify and explain significant deviations from the normal or lognormal distribution in its upper and lower quartiles, present practically in any geological subdivisions of the section. These outbursts in the maximum and minimum ranges are themselves an additional characteristic of soil heterogeneity; they testify to the non-randomness of such “outbursts”, their typicality, which should be taken into account, but they are usually rejected in standard statistical processing due to the smallness of data samples. Such analysis of heterogeneity allows us to see the general picture of the structure of the massif or its part and can be especially useful in case of mottled structure and frequent alternation of soil varieties, which complicates detailed division of the profile. It also provides additional useful information about the potential for the development of unfavorable geological processes in them, for example, to identify suffusion-unstable sand varieties in the massif profile.