Question

If, instead of single drainage, the number of drainage faces is increased to two in responding soils, the rate of compression will be

• A. 4 times slower
• B. 2 times slower
• C. 4 times faster
• D. 2 times faster

Answer 1

The correct option is C 4 times faster

Coefficient of consolidation

$C_v=\frac{T_v{d}^2}{t}$

for two drainage path, rate of compression becomes 4 times faster.