blow count

Definitions

Construction

  • The number of times that an object must be struck to be driven into the soil to a desired or specified depth.
  • In soil borings, the number of times a sample spoon must be struck to be driven 6" or 12".
  • In pile driving operations, the number of times a pile must be struck to be driven 12".
  • The number of blows per unit distance of advance.
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