A concentrated vertical load of 3000 kN is applied on a horizontal ground surface. Points P and Q are at depths 1 m and 2 m below the ground, respectively, along the line of application of the load. Considering the ground to be a linearly elastic, isotropic, semi-infinite medium, the ratio of the increase in vertical stress at P to the increase in vertical stress at Q is ___________. (in integer)
At a site, Static Cone Penetration Test was carried out. The measured point (tip) resistance qc was 1000 kPa at a certain depth. The friction ratio (fr) was estimated as 1% at the same depth.
The value of sleeve (side) friction (in kPa) at that depth was __________. (in integer)
The correct match between the physical states of the soils given in Group-I and the governing conditions given in Group-II is
| Group-I | Group-II | ||
|---|---|---|---|
| 1. | normally consolidated soil. | P. | sensitivity > 16 |
| 2. | quick clay | Q. | dilation angle = 0 |
| 3. | sand in critical state. | R. | liquid limit > 50 |
| 4. | clay of high plasticity. | S. | over consolidation ratio = 1 |
As per Rankine's theory of earth pressure, the inclination of failure planes is $$\left( {45 + {\phi \over 2}} \right)^\circ $$ with respect to the direction of the minor principal stress.
The above statement is correct for which one of the following options?