Tool and Method for Forming Piles

Abstract

The present invention provides a tool for forming an underground cast-in-situ pile having an enlarged base, the tool comprising: a first pile-forming member having a first base- forming member; a second pile-forming member having a second base-forming member, 5 the pile-forming members extending collinearly and being movable in a longitudinal direction relative to one another between: a drilling state wherein the base-forming members are proximate to one another so that the pile-forming members can be driven underground; and a base-forming state wherein the base-forming members are spaced from one another so as to form an underground void between the first and second base- 10 forming members, the void being tillable with a flowable fill to form the enlarged base of the underground cast-in-situ pile; and at least one displacement means for linearly displacing the first pile-forming member from the second pile-forming member to move the tool between the drilling state and the base forming state. 20 25 20 10 74 14 F eb 2 02 5 2 0 2 5 2 0 1 0 7 4 1 4 F e b 2 0 2 5 A B S T R A C T

Images