Answer :
To support a load of 60000Kn with an ultimate pile capacity of 12000Kn and a factor of safety of 3, a total of 16 piles are needed.
A pile foundation is a type of deep foundation that is used when the soil at the surface isn't adequate to support the weight of a structure. Pile foundation design involves determining the pile load capacity using the ultimate load capacity and applying the appropriate factor of safety. The number of piles required is then determined based on the total load applied.
The diameter of the pile in this case is 0.4 m. The ultimate pile capacity is 12000Kn and the factor of safety is 3. Therefore, the allowable load capacity is,
12000Kn/3 = 4000Kn.
To support a load of 60000Kn, the number of piles required is calculated as follows:
60000Kn / 4000Kn per pile = 15 piles
However, to be safe, an additional pile should be added, making the total number of piles needed to be 15 + 1 = 16 piles.
Therefore, 16 piles are required to support the load of 60000Kn.
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