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Pile tester

  • US 5,247,835 A
  • Filed: 11/04/1991
  • Issued: 09/28/1993
  • Est. Priority Date: 05/06/1989
  • Status: Expired due to Fees
First Claim
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1. Apparatus for testing foundation piles comprising a self-contained unit which comprises:

  • an elongate body;

    laterally projecting handle means at an upper region of the body;

    a transducer means for sensing vibration and producing corresponding electrical signals;

    memory means coupled to said transducer means for storing electrical signals from said transducer means;

    a carrier for said transducer means, said carrier being mounted to said body so that said body is longitudinally displaceable relative to said carrier;

    an elongate probe coupled to said carrier and projecting downwardly from the carrier, said probe projecting downwardly from said body to an extent that is variable by displacing said body relative to said carrier; and

    shock means mounted to said body for delivering a pre-determined mechanical shock to said probe;

    said shock means comprising potential energy storage means including lever means coupled to said body and said carrier so that said relative displacement of the body causes the lever means to pivot; and

    a weight coupled to the lever means so as to be lifted thereby, and the arrangement being such that downward displacement of the body relative to the carrier causes upward displacement of the weight relative to the carrier and to the body;

    said shock means further including release means for suddenly releasing the weight after the weight has been raised a predetermined distance so as to impart a mechanical shock to said probe;

    the arrangement being such that the apparatus can be held by the handle means and the probe can then be urged downwardly against a foundation pile, with continuing downward pressure producing downward displacement of the body relative to the carrier and a consequent raising of the weight, and a subsequent release of the weight by the releasing means so as to administer a shock which is transmitted by means of the probe to the foundation pile;

    the shock and subsequent vibrations being sensed by the transducer means which transmits corresponding signals to the memory means for storing by said memory means.

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