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Buried pipe examining method

  • US 7,690,258 B2
  • Filed: 07/26/2005
  • Issued: 04/06/2010
  • Est. Priority Date: 07/26/2004
  • Status: Expired due to Fees
First Claim
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1. A method for examining a deteriorated state of a buried pipe from inside of the pipe, wherein a correlation relationship between a parameter obtained from a force-deformation relationship indicating a relationship between a force externally input to a sample pipe and a deformation of the sample pipe due to the force, and impact elastic wave test data obtained by conducting an impact elastic wave test with respect to the sample pipe is previously obtained, an impact elastic wave test is conducted with respect to a pipe to be examined to collect impact elastic wave measurement data of the pipe to be examined, and the actually measured impact elastic wave measurement data is evaluated based on the correlation relationship between the parameter obtained from the force-deformation relationship and the impact elastic wave test data, thereby quantitatively determining a degree of deterioration of the pipe to be examined.

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