The article presents the formulation and analytical solution of the problem of determining the settlement and bearing capacity of an incompressible pile in a three-layer soil base, taking into account the elastic and elastic-visco-plastic properties of surrounding and underlying soils. It is shown that the force applied to the pile head is distributed and redistributed between the lateral surface of the shell of pile and its tip in time, and that the stress under the tip of the pile increases in time and may approach the critical load. Formulas for determining the settlement and bearing capacity of the pile in time are obtained depending on the physical and mechanical properties of the surrounding and underlying soils, the length and diameter of the pile by the analytical method.
Abstract.The article provides an analytical solution of the soil pile and surrounding soil cylinder interaction problem, with the possibility of extension of the pile shaft in its construction. Presents a closed solution for determination of radial and tangential stresses in the process of expansion of the pile shaft, as well as the minimum vertical force sufficient for the crushing of the pile material and move it in radial direction to the specified value. The problem is most actual for compacted soil bases with use of piles-drains of sand and sand-gravel mixture.
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