Module 5 :
Design of Deep Foundations
Lecture 25 : Pile Groups [ Section 25.3 : Design value of ultimate load ;
Settlement of a pile
]
Compression pile
Fig 5.45 Free body diagram of a compression pile
Z is at any depth, w is the settlement
Strain=
Stress=
Force=
Where s is the perimeter
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Where s is the perimeter 
