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Identical surcharges are placed at ground surface at sites X and Y, with soil conditions shown alongside and water table at ground surface. The silty clay layres at X and Y are identical. The thin sand layer at Y is continouous and freedraining with a very large discharge capacity. If primary consolidation at X is estimated to complete in 36 months, what would be the corresponding time for compeltion of primary cosnolidation at Y?
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- 2.25 months
- 4.5 months
- 9 months
- 36 months
Correct Option: C
Time factor,
| Tv = | d2 |
∴ t ∝ d2
At site X, d1 = 10 m and t1 = 36 months
At site Y, d2 = 5 m and t2 =?
| = | ||||
| t2 | d22 |
∴ t2 = 36 × 52
| ∴ t2 = | = 9 months | 102 |
