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Earth-Pressure--and-Retaining--Walls

A vertical excavation was made in a clay deposit having weight of 20 KN/`m^3`. It caved in after depth of digging reached 4m. Taking angle of internal friction to be zero, calculate value of cohesion. If same clay is used as a backfill against a retaining wall upto a height of 8m, Calculate:
  • total active earth pressure
  • total passive earth pressure

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In above problem, if water table rises behind the wall to an elevation of 1.5 m below the top, determine the total active pressure and ots point of application. Take submerged weight of sand as 12 KN/`m^3`. Assume that there is no change in angle of shearing resistance due to submergence.

A vertical excavation was made in a clay deposit having weight of 20 KN/`m^3`. It caved in after depth of digging reached 4m. Taking angle of internal friction to be zero, calculate value of cohesion. If same clay is used as a backfill against a retaining wall upto a height of 8m, Calculate:
  • total active earth pressure
  • total passive earth pressure

The general relation between shear stress and velocity gradient of fluid can be written as: `tau=A ((du)/(dy))^n+B` Where A , B and n are constants that depend upon the type of fluid and condition imposed on the flow. Comment the value of these constants so that the fluid may behave as:
  • An ideal fluid
  • A newtonian fluid
  • A non newtonian fluid
Also indicate whether the fluid with the following characteristics is Newtonian or non-Newtonian.
  • `tau=A*y+B` and `U=C_1+C_2*y+C_3*y^2`
  • `tau=A*y^(n (n-1))` and `U=C*y^n`

A vertical excavation was made in a clay deposit having weight of 20 KN/`m^3`. It caved in after the depth of digging reached 4m. Taking angle of internal friction to be zero

calculate the value of cohesion. If the same clay is used as a backfill against a retaining wall upto a height of 8m

Calculate: total active earth pressure total passive earth pressure

Earth Pressure and Retaining Walls

Foundation-Engineering-