APPLICATION OF PILE-RAFT FOUNDATION IN COMPLEX ENGINEERING AND GEOLOGICAL CONDITIONS

Purpose. The purpose of the study is to analyze the existing structures of slab-pile foundations, to determine the features of their application and the possibility of their use in complex engineering and geological conditions, as well as to develop alternative constructive solutions of slab-pile foundations for their optimal operation in earthquake-prone areas with base, which deforms unevenly. Methodology. In the study, an analysis of literary sources, data on built and designed slab-pile foundations, their characteristics and application conditions were determined. Special attention is paid to the work of foundations under seismic conditions. Various engineering approaches were used to model loading processes, in particular ANSYS, ABAQUS, and SOFISTIK software packages, to accurately reflect the behavior of soil massifs. Findings. The result of the performed work is the improvement of the combined slab-pile foundation by filling the cavities between the piles and the slab part with seismic insulators made of elastic material, made of rubber in the shape of a cylinder or cube and installed on the heads of the foundation piles, which are not connected to each other. Originality. A new constructive solution of the foundation is proposed, which takes into account the influence of seismic loads and uneven deformation of the foundation. This constructive solution is innovative due to the use of seismic isolators on pile heads, which allows to minimize negative effects on the foundation in difficult conditions. Practical value. The new constructive solution of the slab-pile foundation can be used for work in difficult engineering and geological conditions on the ground, which deforms unevenly in earthquake-prone territories. This decision will contribute to increasing safety and increasing the service life of buildings and structures.