Eccentric Loading

Q. A footing 2 m $\times$ 1 m exerts a uniform pressure of 150 kN/$m^2$ on the soil. Assuming a load disperesion of 2 vertical to 1 horizantal, the average vertical stress (kN/$m^2$) at 1.0 m below the footing is

1. 50
2. 75
3. 80
4. 100

Q. A square footing (2 m $\times$ 2 m ) is subject to an inclined point load, P as shown in the figure below. The water table is located well below the base of the footing. Considering one way eccentricity, the net safe load carrying capacity of the footing for a factor of safety of 3.0 is __ kN.

The following factor may be used:
Bearing capacity factors : $N_q$ = 33.3, $N_{\gamma }$ = 37.16,
shape factors : $F_{qs}$ = $F_{\gamma }$${}_s$ = 1.314
Depth factors : $F_{qd}$ = $F_{\gamma }$${}_d$ = 1.113
Inclination factors : $F_{qi}=0.444,F_{\gamma }$${}_i$ = 0.02

1. 441.71

Q. An eccentrically loaded rectangular footing of size 2.5 m x 3.5 m is placed at a depth of 1 m on a stiff saturated clay. The eccentricity is 0.2 m in each direction. The footing is loaded rapidly and the soil properties are $C=105kN/m^{2}and\gamma =17.8kN/m^3$. The net safe allowable load on the footing as per Terzaghi's if the factor of safety 3.0.

1. 1562 kN
2. 1072 kN
3. 1342 kN
4. 2112 kN

Q. The contact pressure and settlement distribution for a footing are shown in the figure

The figure corresponds to a

1. 
   Rigid footing on granular soil
2. 
   Flexible footing on granular soil
3. 
   Flexible footing on saturated clay
4. 
   Rigid footing on cohesive soil.

Q. The figure given below represents the contact pressure distribution underneath a

1. rigid footing on saturated clay
2. rigid footing on sand
3. flexible footing on saturated clay
4. flexible footing on sand