STUDY OF THE STRESS-STRAIN STATE OF FOUNDATION ELEMENTS
DOI:
https://doi.org/10.31471/2304-7399-2025-20(76)-310-319Abstract
The foundation is the basis of any construction. Currently, various types of foundations and methods of their construction have been developed. Modern construction is faced with complex geological conditions and limited building space, which requires the use of the latest foundation construction technologies. To replace the existing deep-buried concrete foundations, the Pin Pile foundation is becoming widespread - it is a promising alternative, especially in cases where the use of heavy equipment for the delivery of materials and the construction of traditional foundations is impossible or economically inexpedient. However, it is necessary to study and research promising Pin Pile foundations in order to adapt them to specific operating conditions. For this, it is advisable to use simulation modeling based on the finite element method. To establish the characteristics of the foundation constructed using the Pin Pile technology, its three-dimensional model was built. To simplify the simulation modeling, the calculation scheme and the relationships of the structural elements were adjusted. As a result of simulation modeling, the distributions of equivalent stresses and displacements in the studied foundation model were obtained. According to the distribution of equivalent stresses, their maximum values are concentrated in the piles at the exit from the concrete head pipes. This is explained by the boundary conditions and the principle of operation of the foundation. The maximum value of equivalent stresses is 53 MPa, which is not critical for the selected material of the studied piles. As for the displacements observed in the studied foundation model, their maximum value is 0.4 mm. The value of the contact pressure on the “pile-pipe” surfaces was also determined. The maximum value of this pressure is 6.5 MPa, which, given the properties of the materials from which the pipes and piles are made, is acceptable. In further studies, it is planned to establish the influence of soil properties on the stress-strain state of the foundation and to improve it in order to increase its operational characteristics. The coefficient of friction between the foundation elements and the soil will also be taken into account.
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