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Which of the following statements is FALSE regarding the conditions in which a pile foundation is preferred?

  • A.When there are small fluctuations in the sub-soil water level
  • B.When the top soil is of expansive nature
  • C.When the load from the superstructure is heavy and it is to be distributed to a wider area
  • D.When the top soil has poor bearing capacity and it cannot support the load of the structure

Answer: A

The false statement is that a pile foundation is preferred when there are small fluctuations in the sub-soil water level. Piles are preferred when the water level fluctuates a great deal, because shallow footings would be disturbed by the changing moisture, so it is large fluctuations that favour piles. The other three are genuine conditions for choosing piles: an expansive top soil, a heavy superstructure load that must be carried to deeper, stronger strata or spread over a wider area, and a weak top soil of poor bearing capacity that cannot support the structure.

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