QUESTION 3-soil and foundation: A pile group consists of 16 piles, as shown in F

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QUESTION 3-soil and foundation:

A pile group consists of 16 piles, as shown in Figure 9.  Each pile diameter is 14-inches and has an embedded length of 22 feet into a clay layer.  The clay has an unconfined compressive strength of 2500 #/ft2 and a unit weight of 122 #/ft3.  Piles are 4-feet center to center.  Find the groups design capacity if a factor of safety of 2.5 is to be used.  Hint:  Use the method to solve.

a.
197 kips
b.
271 kips
c.
308 kips
d.
395 kips

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