SCREW PILE Russian patent published in 2019 - IPC E02D5/56 

FIELD: construction.

SUBSTANCE: invention relates to construction, namely to foundation construction. Screw pile includes a screw shaft. Screw shaft is made along perimeter of sections mounted of two subsets identical in size and shape, made in form of hollow four and more coal prisms, bases of which are turned relative to each other along central axis 0₁-0₁ subsection by angle of up to 45°, with formation along perimeter of hollow subsections of four and more straight lines, four and more internal helical grooves, and four or more smooth curvilinear surfaces of one direction. Forming bases of four and more coal molds of each subsequent hollow subsection are turned relative to previous hollow subsection along section axis by angle of up to 45°, with formation along the perimeter of the section along its entire length and along the whole length of the screw shaft, four and more broken helical lines, four and more broken internal helical grooves, and four and more broken curvilinear surfaces of one direction.

EFFECT: technical result consists in facilitating the dipping of the borehole into the ground, simplification of manufacturing and expansion of technological capabilities.

1 cl, 6 dwg