The local variation of the overlying soils geotechnical properties in the karst susceptibility assessment

The technique of karst susceptibility assessment in the territory of Ust-Kishert village is presented. The environmental conditions of predominantly gypsum and carbonate-gypsum karst area are analyzed. The zonation map of karst cavities and crushed zones density is created. The distribution of the overlying soil geotechnical property values within the classes of different subterranean karst form density is carried out and presented in the form of histograms and distribution curves. The computer simulation of the soil stress condition is used to demonstrate that karst cavity affects the mechanical properties of the overlying soils and alters the initial stress in the soils. In our research, the anomalous values of the overlying soil geotechnical properties are applied as the indicators of the karst cavities and crushed zones location. The anomalous value intervals are determined by one-dimensional statistical analysis. The analysis of the overlying soil geotechnical properties is resulted in the integral model of karst susceptibility in the research area.