Civil Engineering - GATE Exam Questions - Discussion

26. 

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

Answer: Option B

Explanation:

No answer description available for this question.

Akanksha said: (Oct 16, 2015)  
Please share details explanation of this question.

What's the role of additional drainage layer which present at the middle of the clay stratum?

Amit Padiyar said: (Nov 26, 2016)  
@Akanksha.

Additional drainage layer will reduce the drainage path.

Abdelhamid.Hidar said: (Aug 20, 2017)  
(0.5/1)\^2 *16 = 4 years

Phani said: (May 7, 2018)  
Ans. t2/t1 = d1^2/d2^2,
t1 = 16.
t2 = ?
d1= 50.
d2=100 (50+50) means additional drainage was provided,
= 4yrs.

Abhijeet said: (Mar 2, 2019)  
Thanks @Phani.

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