BORED INJECTION PILE Russian patent published in 2005 - IPC

FIELD: building, particularly for erecting foundations for industrial and civil building, for constructing piles in seasonally freezing ground.

SUBSTANCE: pile comprises upper part made of reinforced concrete, lower part made of ground and reinforced with time-hardening mortar injected in it. Pile has at least one inner injection channel. Upper end of upper pile part comprises means, particularly reinforcement extensions, to connect thereof to structure supported by pile. Lower end of upper part rests upon lower pile part. Each injection channel extends along the full pile length. Upper pile part is made as truncated cone with greater base facing down. Cone has h_u height, b_o and b_u widths of upper and lower bases correspondingly. b_o and b_u are selected from the following: b_u ≤ b_o + 2h_u. Lower pile end is made as convex widening with minimal transversal direction of not less than b_u. Height h_l of lower pile part is determined from a given relation.

EFFECT: increased bearing capacity, provision of lower pile part strength alternating along pile height along with decreased labor inputs and production cost.

3 cl, 5 dwg