Modeling of the deformation process and evaluation of the bearing capacity of a thin-walled structure in the ground

Estimating the strength and durability of thin-walled plastic pipes in the ground is of particular interest at present. This paper deals with the numerical analysis of the ultimate load causing displacements of the ground in which a polyethylene corrugated pipe is located. An elasticviscousplastic model was developed to describe deformations of a thin-walled structure in the ground. The model takes into account the dilatancy and changes in mechanical characteristics of the ground over time and the effect of temperature on the mechanical properties of polyethylene. Numerical experiments were performed using a finite element code developed by the authors. The results of study show the influence of the geometrical and mechanical characteristics of the plastic pipe on the displacements of the ground. The ultimate load causing this phenomenon is determined.

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