COMPUTATION OF THE COMBINED FOUNDATION SETTLEMENT WITH TAKING INTO ACCOUNT NONLINEAR STRAINS OF THE SOIL BASEMENT
In modern building and construction practice, one of the most promising research in the field of foundation design is about combined pile-plate and pile-strip foundations, where both parts transfer forces from the building structures to the soil basement. At the same time, the aspiration to achieve the maximum possible economic effect without losing the strength properties of constructions contributes to an increasing interest in studying the work of the soil foundation in the stage of nonlinear strains, when the linear dependencies between tensioning and settlement go beyond the limits. The authors of this article, using the example of a solid-cast domestic building, considered options of pile-plate and pile-strip foundations, using prismatic piles, which are set up according to the pile jacking technology. Taking into account the fact that, when designing the buildings and structures basements, it is important to normalize the pressure on the soil, and also to use, when calculating, models and schemes describing the stress-strain state of the soil, the model of the stress-strain state of the soil of the foundation was considered, which takes into account the development of nonlinear strains on the limited depth. In the framework of the task, we made the computation of settlement of various footings, according to the linearly deformable half-space scheme, and also taking into account the nonlinear nature of the dependency between tensioning and deformations of the footings. A technical and economic comparison of the proposed options for combined foundations is made, as well as a conclusion is formulated on the practicability and economic benefits obtained as a result of applying the method of computation of settlement of buildings and structures taking into account nonlinearity.