SCREW PILE Russian patent published in 2015 - IPC E02D5/56 

FIELD: construction.

SUBSTANCE: in a screw pile comprising a screw shaft the screw shaft is made along the perimeter in the form of a hollow cylindrical screw surface with outer laps in the form of helical blades along the entire length of the helical surface made of three or more rectangular strips, identical by width and length, of concave or convex shape relative to the axis of the helical surface coiled into a vertical plane in the longitudinal direction and bent along helical lines in the transverse direction on a cylindrical holder and connected to each other to form laps along the perimeter of the helical surface along the entire length of the helical surface, helical lines and helical curved surfaces in the form of helical grooves of concave or convex shape relative to the axis of the helical surface with centres of curvature, located outside or inside the cross section of the helical surface.

EFFECT: invention provides for shaft submersion into soil, simplified manufacturing and expansion of process capabilities, increased stiffness and vibration resistance.

9 dwg