THE STUDY OF TECHNOLOGICAL PARAMETERS FOR THE INSTALLATION OF BORED PILES WITH AN ANTIFRICTION LAYER IN COMPLEX ENGINEERING-GEOLOGICAL CONDITIONS.

Abstract

When installing bored piles in complex engineering-geological conditions, it is recommended to use antifriction materials in the contact zone between the pile and the surrounding soil. These materials reduce the impact of negative friction and help increase the load-bearing capacity of the piles. However, there is currently no clearly defined and scientifically substantiated technological scheme for installing bored piles with an antifriction coating in such soil conditions. Existing technological sequences for installing bored piles with antifriction coatings in complex engineering-geological conditions have a number of drawbacks: high labor intensity in applying the coating, difficulty in achieving a quality coating, and insufficient durability and operational reliability of bored piles for building foundations during the operational period. This can lead to premature failure of the coating layer and, consequently, a reduction in the load-bearing capacity of the pile during the building's service life. Additionally, there are challenges in the processes of lowering the reinforcement cage, joining the layers of antifriction coating, and ensuring proper contact between the pile body and the coating. Therefore, there are several directions for improving the technology of applying antifriction coatings on bored piles when constructing in complex engineering-geological conditions: improving the connection of the antifriction coating and enhancing its attachment to the concrete pile body. Improvements in the technological sequences for installing piles with antifriction coatings in similar engineering-geological conditions have been described, as well as methods for improving the application of the antifriction coating to provide stronger adhesion between the coating strips and the pile body. The result of such improvements is a more guaranteed service life of the antifriction coating on the bored pile and a reduction in negative friction between the coating and the pile body during the operation of the pile.