SOIL MECHANICS_APPSC CE Quiz-4

The clay deposit of thickness 10 cm and void ratio 0.5 undergoes settlement and now it’s final void ratio is 0.2. The thickness (cm) of the settled layer is ____________.

A normally consolidated clay layer settles by 25 mm when the effective stress is increased from 15 kPa to 30 kPa. If the effective stress is later increased further from 30 kPa to 60 kPa, then the additional settlement would be:

Given that for an over-consolidated clay soil deposit, the pressure under which the deposit has been fully consolidated in the past is 125 KN/m² and the present overburden pressure is 75 KN/m². The over consolidation ratio of the soil deposit is:

Clay specimens of soil A and B are tested for finding consolidation properties. For a certain pressure range, the ratio of coefficient of volume compressibility m_va : m_VB and ratio of coefficient of consolidation C_VA:C_VB are respectively 2:1 and 16:9. The ratio of coefficient of permeability K_A:K_B of the soil will be:

Which one of the following shows time factor (approximate), for 50% degree of consolidation?

For routine consolidation test in laboratory, the thickness of the specimen is

A sample of saturated clay has a porosity of 0.562. The void ratio of the clay is

A clay layer of thickness 10 cm and the initial void ratio of 0.5 undergoes settlement so that the final void ratio is 0.2. The settlement of the layer (in cm) is:

A stratum of clay draining both at top and bottom undergoes 30% consolidation under a load in 9 years. If an additional drainage layer were present at the mid height of this clay stratum, what would be the time taken for 30% consolidation under the same load?