ASSESSMENT OF THE STABILITY OF A LOADED SLOPE IN COMPLEX ENGINEERING AND GEOLOGICAL CONDITIONS

The article presents the results of the analysis of the stress state and stability of the soil slope of a complex geological structure on which the treatment facilities of an industrial enterprise are located. The calculation of stability and stress state is carried out for two variants: the natural state of the soil massif and the state determined by the design decision for its reprofiling, taking into account the device of automobile passage. The height of the slope is 12 meters, and the engineering and geological conditions are characterized by 3 category of complexity. The stability calculation is based on the analysis of the stressed state of the soil massif by the Tsvetkov-Bogomolov method, in which the finite element method is formalized, among other things, to determine stresses in inhomogeneous soil objects. The method of constructing the most probable sliding line is based on the fulfillment of the condition of minimality of the stability margin coefficient at each of its points. All calculations are performed using a computer programs developed by the authors of this article and having state registration. As a result of the study, it was found that the global stability of the slope is ensured, but the stability of the upper ledge of the slope, which is a dirt embankment, is insufficient. In this regard, it is necessary to carry out engineering measures to ensure the operational condition of the object. Taking into account the 3rd category of complexity of engineering and geological conditions and the fact that the destruction of the soil massif can lead to significant damage to the environment, it is necessary to organize constant comprehensive monitoring of the soil massif and the structures located on it. It is necessary to carry out engineering (compensating) measures to prevent the destruction of the surface layers over the entire surface area of the slope in places where plastic deformations are localized (the surfaces of both ledges). According to the results of the monitoring, it is necessary to make a decision on the need to strengthen the soil of the base of the aeration tank in the locations of areas of plastic deformations (left, right, under it) in order to avoid uneven precipitation of the base and rolls of the structure.