Study of the Strained State of Bored Foundations for Weak Soils by Strengthening the Grillage with Geosynthetic Materials

Construction in northern regions of the Far East is always connected with a high degree of seasonal freezing risk. This is especially true for line transport structures which require a high level of reliability and responsibility. Such structures should provide permissible deformability and bearing capacity of the bases when exposed to moving loads in difficult geological and climatic conditions. The paper considered the development of bridge supports stabilizing structures using mathematical modeling methods and geosynthetic materials. The study used standard methods of engineering calculations using analytical approaches to determine the rational parameters of structural elements and the degree of their operational reliability and durability. In determining the behavior of structures as a whole, with the collaborative interaction of their individual elements with each other, nonlinear soil models of the base of the structures were used. Numerical modeling of bored foundations in an elastic–plastic soil mass allowed to work out effective structural solutions for reducing the deformability of the bridge and increasing the bearing capacity of the pile foundation due to reinforcing measures in the construction of the grillage and creating rational parameters of structures as a whole.