BORED PILE DEVICE METHOD Russian patent published in 2020 - IPC E02D5/56 

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular, to pile foundations. Bored pile installation method includes well formation in soil by drilling, arrangement of metal frame in pipe cavity and supply of concrete mixture to it. By screwing in the drilled well, the pipe with screw winding is lowered at the lower end of the pipe, at that, the winding has larger diameter relative to the well diameter for formation of contact of the screw worm edge with the well walls. After the frame is placed in the cavity of this pipe, the concrete mixture is supplied through it to the well under pressure and the pipe is unscrewed at the same time; the walls of the well are compacted and the pile is formed with a concrete mixture under the screw worm as the pipe moves.

EFFECT: technical result consists in expansion of arsenal of technical means used in construction of bored piles, providing higher bearing capacity of bored pile due to compaction of walls of well at formation of pile, simplification of technology of erection, reduction of power inputs.

1 cl, 5 dwg