Method of making built-in-place reinforced concrete piles

A method of making reinforced concrete piles, comprising forming a borehole in the ground;

• filling the borehole with a concrete mix;
• introducing a tool into the filled borehole to compact the mix and form an axial cavity;
• deforming a tubular reinforcing framing in the radial direction;
• placing the deformed framing in the axial cavity along its entire length;
• filling the cavity with a concrete mix and successively axially introducing into and withdrawing from the filled cavity an expanding tool of a size to compact the mix and radially expand the borehole to a predetermined diameter while radially expanding the reinforcing framing.