DEVICE FOR FORMATION OF WELLS BY METHOD OF SOIL COMPACTION IN WELL WALL Russian patent published in 2012 - IPC E02F5/16 

FIELD: construction.

SUBSTANCE: invention relates to construction, namely, to erection of foundations on filling piles, as well as for trenchless installation of pipelines, cable communication and power transmission lines. A device comprises an expander in the form of a hub with a helical blade and a conical tip, rigidly connected with a tubular shaft with outlet holes aligned perpendicularly to its axis, a screw leader, the helical blade of which has the same winding and pitch as the helical blade of the expander hub, a source of a gas dynamic pulse connected to the tubular shaft. The screw leader is equipped with a mechanism of obstacle damage, and the tubular shaft is connected to the source of a gas dynamic pulse with a hollow rod, inside of which there is a pipeline mounted for supply of compressed air to drive the mechanism of obstacle damage.

EFFECT: device makes it possible to reduce losses of wells in soils with inclusions of stones and boulders to the minimum.

2 cl, 2 dwg