ABSTRACT
The present article deals with numerical studies on a dependence of the subsoil elasticity coefficient on the diameter of bored piles upon their design for horizontal loading in clayey soil. The article addresses a non-linear dependence between subsoil deformability and the diameter of a bored pile. The purpose of the article is to determine quantitative parameters of the dependence. To achieve that purpose, theoretical studies, including design of horizontally loaded bored piles using Plaxis 3D software and the existing applied design methods, are conducted. The studies are performed for piles with a diameter from 400 to 1,200 mm in diameter increments of 200 mm, that operate in subsoil under the “rigid” arrangement. According to the calculation results, curves of load/displacement are plotted and subsoil elasticity coefficients for the elastic stage of pile operation are determined. An analysis of the results obtained allows revealing a dependence between the subsoil elasticity coefficient and the pile diameter. Scaled coefficient ψ, taking into account the non-linear dependence between subsoil deformability and the pile diameter, is suggested. Following the findings, an increase in the scaled coefficient with an increase in the diameter of a bored pile is noted, and conclusions on the need to use it in design of large-diameter piles are drawn.
