FONDEDILE PILE WITH INCLINED LOCAL BROADENINGS Russian patent published in 2014 - IPC E02D5/46 

FIELD: construction.

SUBSTANCE: fondedile pile with inclined local broadenings includes chisels, hoses, coupling sleeves and crown sleeves with cavities in drilling blades, in which locking elements are installed. A locking element in each cavity is designed in the form of a valve, consisting of a conical plunger with a return spring fixed inside the cavity, which is arranged at an angle of α₁=45÷60° to the axis of the pile. A diameter of the outlet aperture of the cavity is 1.5-2 times smaller than the diameter of the inlet aperture. The upper edge of the drilling blade is made at an angle of α₂=30÷45° to the perpendicular dropped to the axis of the pile, forming the upper cutting edge of the drilling blade.

EFFECT: reduction of materials consumption, increase of reliability of the structure and the bearing capacity of the fondedile pile under the influence of the pulling and pressing load.

3 dwg