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Slotted Mandrel for Lateral Displacement Pier and Method of Use

  • US 20080193223A1
  • Filed: 05/19/2006
  • Published: 08/14/2008
  • Est. Priority Date: 05/20/2005
  • Status: Active Grant
First Claim
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1. A system for constructing aggregate piers which comprises a hollow mandrel having elongated slots spaced vertically in a sidewall of said mandrel, a base machine for driving said mandrel generally vertically into the ground, and a hopper at the ground surface through which said mandrel passes, said hopper filled with aggregate to flow into said mandrel through said slots.

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