Soil Mechanics and Foundation Sheet 28

If the proportion of soil passing 75 micron sieve is 50% and the liquid limit and plastic limit are 40% and 20% respectively, then the group index of the soil is

The standard penetration resistance N of a granular deposit is found to be 20. The soil can be classified approximately in terms of $\varphi$ and density index respectively as

A raft of 6 m x 9 m is founded at a depth of 3 m in a cohesive soil having $c=120 kN/m^2$. The ultimate net bearing capacity of the soil using Terzaghi's theory will be nearly

Ratio of bearing capacity of double Under Reamed (U.R.) pile to that of single U.R. pile is nearly

With a vertical point load on the surface when considering the vertical plane passing through the load, the stress gets reduced by 52.3% at a depth of

Consider the following:

1.   Initial consolidation

2.   Primary consolidation

3.   Secondary consolidation

4.   Final consolidation

The three stages which would be relevant to consolidation of a soil deposit includes

Consider the following statements:

The Standard Penetration Test (SPT) in soils is the most commonly used field test. SPT is used to determine

1.   consistency of clay.

2.   un-drained shear strength of soft sensitive clay.

3.   relative density of sands.

4.   drained shear strength of fine loose sand.

Of these statements

Which one of the following tests cannot be done without undisturbed sampling?

A good quality undisturbed soil sample is one which is obtained using a sampling tube having an area ratio of

Consider the following statements associated with local shear failure of soils:

1.   Failure is sudden with well-defined ultimate load.

2.   This failure occurs in highly compressible soils.

3.   Failure is preceded by large settlement.

Of these statements