Question: A 6 0 0 - mm diameter concrete pile ( 1 2 m long ) is to be driven into a layered soil, as shown

A 600-mm diameter concrete pile (12m long) is to be driven into a layered soil, as shown in the sketch. The total unit weight of sand is 16kNm3, while that of the gravel is 20kNm3. The water table is 2m below the ground level.
Calculate the allowable vertical load of the pile using a factor of safety of 2. Include the effect of pile weight and overburden stress
Assume the unit weight of concrete to be 24kNm3; and a limiting value of unit skin friction =85 kPa.
A 6 0 0 - mm diameter concrete pile ( 1 2 m long

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