Uses of Piles-1 in Civil Engineering
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Questions and Answers

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 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?

  • 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?

    <p>Creates undesirable heave in adjacent ground</p> Signup and view all the answers

    What does driving a hollow steel pile into the ground filled with sand achieve?

    <p>Improves stability and reduces settlement</p> Signup and view all the answers

    When are sand compaction piles particularly helpful?

    <p>When footing is underlain by highly compressible stratum</p> Signup and view all the answers

    The total load per timber pile should not exceed 65 T.

    <p>False</p> Signup and view all the answers

    The Eurocode recommends the use of limit state design approaches in geotechnical engineering designs.

    <p>True</p> Signup and view all the answers

    For undrained conditions, the soil parameters c, f, ca, and g should be considered in determining the allowable pile capacity Pa.

    <p>True</p> Signup and view all the answers

    The factor of safety for spread foundations is generally larger than that for piles.

    <p>False</p> Signup and view all the answers

    The drained load capacity is usually more critical than the undrained load capacity in stiff overconsolidated clays.

    <p>True</p> Signup and view all the answers

    Dynamic approach in pile design estimates load capacity from measured soil properties.

    <p>False</p> Signup and view all the answers

    For long-term ultimate load capacity of piles in sand, soil parameters c', f', ca' and g' should be undrained values.

    <p>False</p> Signup and view all the answers

    In a free standing group of piles, the pile cap is always in contact with the underlying soil.

    <p>False</p> Signup and view all the answers

    Analysis of individual pile forces in a pile group is always simplified using elementary statics.

    <p>False</p> Signup and view all the answers

    For point-bearing piles, the value of h is always 1 for all spacings.

    <p>True</p> Signup and view all the answers

    For free standing groups of friction piles in clays, the value of h decreases as the spacing increases.

    <p>False</p> Signup and view all the answers

    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.

    <p>False</p> Signup and view all the answers

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