An apparatus and method for forming a support pier having a single or
multiple compacted aggregate lifts in a soil matrix, wherein the
apparatus includes a vertical, hollow tube with a bulbous leading end or
head element that is forced into the soil matrix. The hollow tube
includes a mechanism for releasing aggregate from the lower head element
of the tube as the tube is lifted incrementally. The same hollow tube is
then utilized to compact the released aggregate. The process may be
repeated to form a series of compacted lifts comprising a pier.