Application of adaptive technologies of the finite element method for analysing the stress-strain state of soil

Modeling the interaction of engineering structures with the soil is a non-trivial task that constantly arises in the design of transport structures. Simplification of the design scheme using the hypotheses of the theory of elasticity does not always give correct results. Therefore, to refine the design models, it is necessary to take into account the nonlinear work of the soil using various algorithms of the theory of plasticity and soil mechanics. The authors have developed a software module for determining the stress-strain state of a soil mass, taking into account physical nonlinearity. The paper presents the results of a comparative analysis of calculations of soil mass in a linear and nonlinear formulation at various gradients of the mesh density.