Question

When the degree of consolidation is 50%, about how much is the time factor?
1. 0.5
2. 2.0
3. 1.0
4. 0.2

Answer 1

Correct Answer - Option 4 : 0.2

Given,

Degree of consolidation = 50%

U = 50%

Time factor

\(T_v = \frac \pi 4(U^2)\) when U ≤ 0.6

T_v = 1.781 - 0.933 log₁₀ (100 - U%)

U > 0.6

Than \(T_v = \frac \pi 4 \left(\frac {50}{100}\right)^2\)

\(= \frac \pi 4 \left(\frac 1 2 \right)^2\)

T_v = 0.196

So, T_v ≃ 0.2