A 25 m deep bored pile has a shaft of 1 m diameter and enlarged base of 2.5 m diameter in the lower 1.5 m depth. The undrained cohesion of the soil varies from 100 kN/m2 at the top to 150 kN/m² at the base. Assume that there is no adhesion in enlarged base and one-third depth of pile above the enlargement. What is the safe load on the pile? [Take FOS = 2.5 and a = 0.45]

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A 25 m deep bored pile has a shaft of 1 m diameter and enlarged base of 2.5 m diameter in the lower 1.5
m depth. The undrained cohesion of the soil varies from 100 kN/m2 at the top to 150 kN/m2 at the base.
Assume that there is no adhesion in enlarged base and one-third depth of pile above the enlargement.
What is the safe load on the pile? [Take FOS = 2.5 and a =
0.45]
Transcribed Image Text:A 25 m deep bored pile has a shaft of 1 m diameter and enlarged base of 2.5 m diameter in the lower 1.5 m depth. The undrained cohesion of the soil varies from 100 kN/m2 at the top to 150 kN/m2 at the base. Assume that there is no adhesion in enlarged base and one-third depth of pile above the enlargement. What is the safe load on the pile? [Take FOS = 2.5 and a = 0.45]
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