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Questions and Answers
What is the main cause of frictional resistance, f, during pile driving?
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?
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?
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?
What is the zone of sand densification caused by pile driving?
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What is a conservative estimate for the critical depth, L'?
What is a conservative estimate for the critical depth, L'?
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