Page 48 - Unit2.docx
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0m - 5 m 5.4
5 - 22 6.4
22 - 28 7.0
28 - 22 7.5
22 m 8.0
The values are slightly scattered then the usual while the rest of the condition
is favourable.
γ Rd = 2.5 (the lowest value)
γ n = 2.2
At the base where condition is unfavourable we get :
© It's Engg. Life
α s = 0.5
α m = 0.0025
Design bearing capacity of the pile is 62 KN.
5.3 Cohesion piles
Piles installed in clay: The load is carried by cohesion between the soil and
the pile shaft. Bearing capacity of the pile can be calculated using the
following formula for pile installed in clay.
………………………… 5.2
Where:

