METHOD FOR MANUFACTURING A WIDENED CAST-IN-PLACE PILE Russian patent published in 2023 - IPC E02D5/44 

FIELD: pile foundations.

SUBSTANCE: invention relates to the structure of pile foundations for various purposes, in particular the pile foundation of the vehicle rail track made of load-bearing precast concrete elements. The method for manufacturing a widened cast-in-place pile includes drilling an inventory hole with subsequent formation of a heel and filling the resulting cavity with a concrete mixture, or after forming a heel and filling it with a concrete mixture, a hollow reinforced concrete pile is lowered into the well, followed by filling the pile cavity with a concrete mixture. A metal frame is immersed into a pre-drilled inventory well, made of a non-recoverable shell, having a rectangular section with axial cuts on the walls and formed corrugations with a technological height, providing directional radial deformation. The shell is made with a support plate with a guide cone in the lower part, with the injector pipe passing through which and along the axis of the shell. An inventory pipe is installed on the metal frame, on the upper part of which a pressure plate is installed, through which a compressive force is transmitted simultaneously with a pulling force on the injector pipe, with the formation of corrugations by longitudinal compression of the shell walls, and the space for the corrugation of the heel, which is concreted through the inventory pipe and injector pipe.

EFFECT: creation of a reliable and manufacturable method for manufacturing a cast-in-place pile with a heel.

1 cl, 7 dwg