Building Construction
Negative skin friction

Both (A) and (B)
Is a downward drag acting on a pile due to downward movement of the surrounding compressible soil relative to the pile
Develops due to lowering of ground water
Neither (A) not (B)

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Building Construction
In clay soil

Swelling and shrinkage characteristics prevail
Differential settlement is generally prevalent
Consolidation continues even after several years of construction
All listed here

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