DEVICE FOR FORMATION OF WELLS FOR FILLING PILES Russian patent published in 2012 - IPC E02D7/20 

FIELD: construction.

SUBSTANCE: device for formation of wells for filling piles comprises a working element in the form of a hub with a helical blade and a cone tip rigidly connected by a tubular shaft with exhaust holes aligned perpendicularly to its axis, with a helical leader, the helical blade of which has the same winding and pitch as the helical blade of the hub, the drive of the working element in the form of a hollow rotary stem, the upper end of which is connected with a source of a gas dynamic pulse, and the lower one - to a working element. The stem is fixed to the hub of the working element via a detachable flange, and the shaft of the helical leader has a through hole, at the outlet end of which on the spring there is a bump stop. The device is equipped with a mechanism for damaging obstacles in the form of a hydraulic hammer with an extender fixed on the flange of the replaceable stem, inside of which there is a pipeline mounted for supply of the working fluid to the hydraulic hammer.

EFFECT: increased efficiency of device performance, higher bearing capacity of a filling pipe arranged in a well, provides for overcoming obstacles when arranging wells.

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