Pile Driving Frictional Resistance Quiz
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Questions and Answers

What is the main cause of frictional resistance, f, during pile driving?

  • The pile installation method (correct)
  • The depth of pile installation
  • The pile diameter
  • The soil type around the pile

    • What is the approximate range of the critical depth, L', where unit skin friction remains constant?

  • 10 to 15 pile diameters
  • 20 to 25 pile diameters
  • 15 to 20 pile diameters (correct)
  • 5 to 10 pile diameters

    • How does the unit skin friction vary with depth during pile driving?

  • Unit skin friction decreases linearly with depth
  • Unit skin friction first increases then decreases with depth
  • Unit skin friction increases more or less linearly to a depth of L' and remains constant thereafter (correct)
  • Unit skin friction remains constant at all depths

    • What is the zone of sand densification caused by pile driving?

    <p>2.5 times the pile diameter</p> Signup and view all the answers

    What is a conservative estimate for the critical depth, L'?

    <p>20 pile diameters</p> Signup and view all the answers

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