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GATE Exam Questions

Q1: A saturated clay stratum draining both at the top and bottom undergoes 50 percent consolidation in 16 years under an applied load. If an additional drainage layer were present at the middle of the clay stratum, 50 percent consolidation would occur in

A 2 years

B 4 years

C 8 years

D 16 years

ANS:B - 4 years

Ans. t2/t1 = d1^2/d2^2,
t1 = 16.
t2 = ?
d1= 50.
d2=100 (50+50) means additional drainage was provided,
= 4yrs.



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