Evaluation of Subgrade Vertical Deformations of the Building with the Influence of a Deep Pit

The existing methods for calculating the settlements of the foundations of buildings are designed for the case of a short-term static loading. These methods are not able to take into account the actual loading regimes of soil bases, including changes in the mechanical characteristics of soils in the previous stages of loading, the manifestation of rheological properties over time, the formation and development of cracks, as well as changes in loading conditions. In this paper, the method of calculating the settlement of foundation bases, taking into account the changes of abovementioned soil parameters and loading conditions was considered. The modified Pasternak model is taken as a basis and changes are made by transforming the diagrams of soil deformation under three-axis long-term loading. The ultimate stresses in the soil are determined based on the design model of the soil under triaxial compression, developed by I. T. Mirsayapov and I. V. Koroleva for regime loadings. The method proposed in this paper was tested on a real reconstructed object. Deformation plots and settlement values obtained as a result of calculations were confirmed by the results of geomonitoring.