DEVICE TO FORM BORE PILES Russian patent published in 2011 - IPC E02D5/56 

FIELD: construction.

SUBSTANCE: device to form bore piles comprises a working element to create a well for a pile in the form of a hub with a cone tip, equipped with a helical blade, in the end of which on the hub there is a cone segment fixed at the angle of helical blade lift with its top towards it, and rigidly fixed by means of a tubular shaft with exhaust holes with an anchor, a helical blade of which has the same winding and pitch as the helical blade of the hub, the working element drive in the form of a hollow rotary stem, where there is a sleeve installed movably with a vibrator fixed on it, at the same time the lower end of the stem is connected with the tubular shaft of the working element, and the upper end of the stem, while the working element is being screwed, is connected to a source of gas-dynamic pulse, and after screwing - with the pump to supply soil-reinforcing mixture or concrete.

EFFECT: increased bearing capacity of bore piles.

1 cl, 3 dwg