Patent ID: 8113744

Claim:
A jetting system for installing foundation underpinning to support a foundation in the soil, the jetting system comprising: a plurality of pile segments forming a pile, each of the pile segments comprising: a head, having a lower annular, axial surface to engage the soil; a trunk extending from the head; and a throughbore passing axially through the head and the trunk, the throughbore having a longitudinal centerline; wherein the area of a cross-section through the head and normal to the centerline is greater than the area of a cross-section through the trunk and normal to the centerline; and wherein the throughbores of the pile segments are vertically aligned forming a passage through the pile, the passage having an upper end in the uppermost pile segment and a lower end in the lowermost pile segment; an elongate reinforcing tubular disposed within the passage, the reinforcing tubular extending continuously between the upper end of the passage and the lower end of the passage, wherein the elongate reinforcing tubular aligns the throughbores of the pile segments; and a jetting tube having a first end with an outlet and a second end with an inlet, the first end of the jetting tube inserted into the reinforcing tubular.