Assessment of Pile-Slab Foundation Settlement in Pseudo Non-Linear Formulation

An analytical solution of the problem of interaction between a pile-slab foundation and a 2-layer linearly deformable ground foundation is proposed. To take into account the nonlinear behavior of soils in the elastic formulation, a graph-analytical method was proposed, which limits the bearing capacity of a pile on the lateral surface to the strength value of the adjacent soil and further redistribution of the applied load on the pile toe. In this work, a comparative analysis of the proposed modified analytical solution of the problem, taking into account the nonlinear operation of soils in an elastic formulation, with a numerical solution in an elastic-plastic formulation, is carried out, and the area of application of the proposed modified analytical solution, which takes into account the described mechanism of the nonlinear operation of the soil, has been studied. Numerical modeling was performed in the geotechnical software package Plaxis 2d, the soil behavior was described by the elastic-plastic Mohr-Coulomb model. According to the results of analytical and numerical calculations for various values of soil strength, graphs of the dependence of settlement on loads were constructed, which showed that the qualitative and quantitative convergence of the results is influenced by the strength of the soil. The results of analytical and numerical calculations at different values of soil strength showed that the qualitative and quantitative convergence of the results were influenced by soil strength. At high values of soil strength, the convergence of solutions is higher, however, at low values of strength the application of the proposed modified analytical solution is limited and its refinement is required.

V.V. SIDOROV, Candidate of Sciences (Engineering), Docent of the Department MGiG NIU MGSU, Research Center “Geotechnics named after Z.G. Ter-Martirosyan”,
A.S. ALMAKAEVA, Junior Researcher of Research Center “Geotechnics named after Z.G. Ter-Martirosyan” (This email address is being protected from spambots. You need JavaScript enabled to view it.)

National Research Moscow State University of Civil Engineering (26, Yaroslavskoye Highway, Moscow, 129337, Russian Federation)

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