A 12 m thick layer of Chicago clay is doubly drained. This means that a very previous layer compared to the clay exists on top of and under the 12 m clay layer. The coefficient of consolidation of the clay is cv = 8.0 x 10-8 m2/s. Find the degree or percent consolidation for the clay 5 years after loading at depths of 3, 6, 9, and 12 m.

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa. s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)