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Pyramidal or conical shaped tamper heads and method of use for making rammed aggregate piers

  • US 20070077128A1
  • Filed: 09/28/2006
  • Published: 04/05/2007
  • Est. Priority Date: 09/29/2005
  • Status: Active Grant
First Claim
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1. A method of constructing aggregate piers comprising the steps of:

  • forming an elongated cavity in a ground surface, said cavity having a generally uniform cross-sectional area;

    placing a lift of aggregate into the cavity with a lift thickness approximately equal to a distance across the cavity;

    tamping the lift with a pyramidal or conically shaped tamper head having a top or base approximately equal to said cross-sectional area of the cavity to increase the lateral stresses in the sidewall of the hole; and

    repeating the placing and tamping steps with successive lifts.

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