For the applined linear forces on the soil, determine the stress increase at point C if

$q_1=270k\frac{N}{m}$

$q_2=210k\frac{N}{m}$

Solution:

Stress increase at point A due to $q_1$ :

$\frac{x}{2}=$

Influence factor I$=$

Stress increase at point A due to $q_1$ :

Stress increase at point A due to $q_2$ vertical component:

$\frac{x}{2}=$

Influence factor $1=$

Vertical component of $q_2$ :

Stress increase at point A due to $q_2$ vertical component:

Stress increase at point A due to $q_2$ horizontal component:

$\frac{x}{z}=$

Influence factor $1=$

Horizontal component of $q_2$ :

Stress increase at point A due to $q_2$ horizontal component:

Thus total stress increase at point $A$ is: