DRIVING METHOD OF DRIVEN HOLLOW PILE WITH A WIDENED BASE Russian patent published in 2019 - IPC E02D5/44 

FIELD: construction.

SUBSTANCE: method of hollow driven pile organization consists in that pile with axial cavity is immersed into soil of base with closed lower end and broadened base is formed. Pile is pierced at preset depth with bottom end closed by lost puncher, after which inventory rod with detachable tip through axial cavity of pile at design depth of widened base end face of removable tip is dipped in soil shoe-punch to form cavity under bottom end of pile. Then, expanding shoe is lowered into the inner cavity of the shoe-punch. Hard soil material is poured over it into the formed cavity above it in an end face of the removable tip of the pipe-bar to the bottom butt end of the pile with formation of the widened base. Pile is produced with immersion of its end face into broadened base to failure state.

EFFECT: device of pile foundations from driven (pressed) hollow round piles with open ends, as a rule, with diameter of up to 600 mm, square prismatic piles with round inner cavity with size in cross section up to 400 mm et cetera is described mainly in weak wet and waterlogged soils underlain by bearing layer of soil with required physical and mechanical characteristics.

3 cl, 4 dwg