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Settlement of Piles According to
Egyptian code of practice
Elastic compression
• Se = (Qb + Qf) * (L / AEp)
• = 0.33 to 0.67 according to stress distribution along pile’s shaft
Settlement due to Bearing Load Qb
• Spp = (Cb Qb) / (d. q)
• q= ultimate end-bearing stress
• d= pile diameter
• Cb = factor depends on method of construction
and soil type
Cb Values for settlement of single pile
Soil type Displacement piles Bored piles
0.09 to 0.18
Dense to loose sand 0.02 to 0.04
Hard to very soft clay 0.02 to 0.03 0.03 to 0.06
Dense to loose silt 0.03 to 0.05 0.09 to 0.12
Settlement due to Friction load Qf
• Sps = (Cs Qf ) / (Lo * q)
• Cs = (0.93 + 0.16 ((Lo/d))
Total settlement of single pile:
So = Se + Spp + Sps
Lo = embedded length of pile
L = total length of pile
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