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Questions and Answers
What is the purpose of using sand compaction piles?
What is the purpose of using sand compaction piles?
- To improve stability and reduce settlement (correct)
- To resist overturning forces
- To increase settlement
- To decrease stability
In what situation would End Bearing Piles be most useful?
In what situation would End Bearing Piles be most useful?
- In deep uniform bed of soil (correct)
- In highly compressible soil
- When depth to hard formation is large
- When the load is not distributed vertically along the pile shaft
Why is seeping water from concrete a concern with Bored Cast-in-situ piles?
Why is seeping water from concrete a concern with Bored Cast-in-situ piles?
- Possibility of necking in length of pile
- It will increase stability
- Can easily extend length above ground
- It will decrease mechanical properties of the adjacent soil (correct)
What is a disadvantage of precast piles compared to other types of piles?
What is a disadvantage of precast piles compared to other types of piles?
What does driving a hollow steel pile into the ground filled with sand achieve?
What does driving a hollow steel pile into the ground filled with sand achieve?
When are sand compaction piles particularly helpful?
When are sand compaction piles particularly helpful?
The total load per timber pile should not exceed 65 T.
The total load per timber pile should not exceed 65 T.
The Eurocode recommends the use of limit state design approaches in geotechnical engineering designs.
The Eurocode recommends the use of limit state design approaches in geotechnical engineering designs.
For undrained conditions, the soil parameters c, f, ca, and g should be considered in determining the allowable pile capacity Pa.
For undrained conditions, the soil parameters c, f, ca, and g should be considered in determining the allowable pile capacity Pa.
The factor of safety for spread foundations is generally larger than that for piles.
The factor of safety for spread foundations is generally larger than that for piles.
The drained load capacity is usually more critical than the undrained load capacity in stiff overconsolidated clays.
The drained load capacity is usually more critical than the undrained load capacity in stiff overconsolidated clays.
Dynamic approach in pile design estimates load capacity from measured soil properties.
Dynamic approach in pile design estimates load capacity from measured soil properties.
For long-term ultimate load capacity of piles in sand, soil parameters c', f', ca' and g' should be undrained values.
For long-term ultimate load capacity of piles in sand, soil parameters c', f', ca' and g' should be undrained values.
In a free standing group of piles, the pile cap is always in contact with the underlying soil.
In a free standing group of piles, the pile cap is always in contact with the underlying soil.
Analysis of individual pile forces in a pile group is always simplified using elementary statics.
Analysis of individual pile forces in a pile group is always simplified using elementary statics.
For point-bearing piles, the value of h is always 1 for all spacings.
For point-bearing piles, the value of h is always 1 for all spacings.
For free standing groups of friction piles in clays, the value of h decreases as the spacing increases.
For free standing groups of friction piles in clays, the value of h decreases as the spacing increases.
For piles deriving their ultimate load capacity from both side-adhesion and end-bearing, the group effect should only be considered for the end-bearing component.
For piles deriving their ultimate load capacity from both side-adhesion and end-bearing, the group effect should only be considered for the end-bearing component.
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