Problem $2$

$(15$ points$)$

Refer to the soll profile shown in Figune $2.$

Calculate the variation of $,u,$ and ${}^{\text{'}}$ with depth.

If the water table rises to the top of the ground surface, what is the change in the effective stress at the bottom of the clay liyer?

How many feet must the groundwater tathe rise to decrease the effective stress ly $300l\frac{b}{f}{t}^2$ at the bottom of the clay laye?

Fegure $2.$ Soll layer with different propertis