SCREW PILE Russian patent published in 2010 - IPC E02D5/56 

FIELD: construction engineering.

SUBSTANCE: hollow screw body is made of one circular-coiled strip with its turns being interconnected in the tips. The strip is bent along bend lines inclined to its edges to form along the external and internal surfaces the one-way curved pocket-shaped spirals and helixes which can differ both in shape and dimensions on the perimetre of the screw pile. And the bend line distance is equal to the total length of perimetres of pocket geometries within the internal and external surfaces.

EFFECT: technological enhancement.

6 dwg