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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
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- 2 years
- 4 years
- 8 years
- 16 years
Correct Option: B
Time factor,
| Tv = | t ∝ d2 | d2 |
d = H for single drainage d = H/2 for double drainage.
I case.
t1 = 16 years, d = H/2
I case.
t2 = ?
| d = | = | |||
| 2 | 4 |
| = | ||||
| t2 | (H/4)2 |
(t ∝ d2)
