Patent ID: 8172483

Claim:
A foundation underpinning to support a foundation comprising: a pile including a plurality of pile segments, aligned end to end, the pile having an uppermost pile segment and a lowermost pile segment with the remaining pile segments positioned therebetween, wherein each of the one or more pile segments comprises: a head; 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 the head includes a lower annular surface normal to the centerline; and wherein the throughbores of the one or more pile segments are vertically aligned forming a passage through the pile; and an elongate reinforcing tubular disposed within the passage and extending from within the uppermost pile segment into the lowermost pile segment, the reinforcing tubular formed of a plurality of tubular segments coupled end-to-end, wherein at least one end of each tubular segment in connected to an end of an adjacent tubular segment and forming a passage through the pile.