Kalychava T. Value Criteria of building foundations engineering protection in complicated soil conditions

Methods for determination of optimal protective measures for structures constructing at complicated soil conditions are improved. There is ascertained, all soil deformation and dynamic processes flowing at different geological formations can influence on buildings at form of one action type and two load types only. That gave chance to use the single influence criteria and to develop methods for determination of protection optimal level for four basic processes. They are definite on analogy with appropriate basic processes for other processes.Рrotect level for buildings is determined on condition of non-admission of structure inrushes, which are dangerous for peoples and protect realization on condition non-exceeding of cost of protective measures of probable loss in case their absence. Such methods for calculation of economical performance for used protective measures for buildings give chance to avoid their unfounded overestimation peculiar to nowadays calculation methods. Forthcoming loss is determining at they on limit possible level of base deformation without probability it achievement during building service life take into consideration. There are elaborated methods for probability calculation of uncertainty of action results of deformation processes at complex soil conditions liked to methods recommended by Building Codes for deformation and base bearing capacity calculation. Expediency on building construction without protective measures, with insurance against possible damages at simple soil conditions is proved. Principles of insurance rate defining are proved also. Keywords: soil, deformations, loads, influence criteria, displacement.