Show a section of a gravity dam built of concrete examine the stability of this section at the base. The earth quake may be taken as equivalent to 0.1g for horizontal forces and 0.05g for vertical forces. The uplift may be taken as equal to the hydro-static pressure at the either ends and is considered 60% of area of the section. Assume unit weight of concrete = 24kn/m3 Unit weight of water = 10kn/m3

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)