A retaining wall 6 m high with a vertical back supports a cohesionless soil with a dry unit weight of 16 kN/m³, a saturated unit weight of 19.62 kN/m³ and an angle of friction of 35°. The surface of the soil is horizontal and at level with the top of the wall. Neglecting wall friction, determine the total active earth thrust of the wall per lineal metre, and the height above the base of the wall at which the thrust acts. Use the following equations to answer both questions: Ka Kp %3D 1– sino Ka 1+ sing 1+ sino Kp 1- sing For the wall described in the previous question, assume that due to poor drainage the water table rises to 2.5 m below the surface. Determine the new determine the total active earth thrust of the wall per lineal metre, and the height above the base of the wall at which the thrust acts.

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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2. (a) A retaining wall 6 m high with a vertical back supports a
cohesionless soil with a dry unit weight of 16 kN/m², a
saturated unit weight of 19.62 kN/m³ and an angle of friction
of 35°. The surface of the soil is horizontal and at level with
the top of the wall. Neglecting wall friction, determine the
total active earth thrust of the wall per lineal metre, and the
height above the base of the wall at which the thrust acts.
Use the following equations to answer both questions:
Oha
Ka =
K, =
%3D
1– sind
Ка
1+ sino
1 + sino
Kp
1 – sino
For the wall described in the previous question, assume that
due to poor drainage the water table rises to 2.5 m below the
surface. Determine the new determine the total active earth
thrust of the wall per lineal metre, and the height above the
base of the wall at which the thrust acts.
Transcribed Image Text:2. (a) A retaining wall 6 m high with a vertical back supports a cohesionless soil with a dry unit weight of 16 kN/m², a saturated unit weight of 19.62 kN/m³ and an angle of friction of 35°. The surface of the soil is horizontal and at level with the top of the wall. Neglecting wall friction, determine the total active earth thrust of the wall per lineal metre, and the height above the base of the wall at which the thrust acts. Use the following equations to answer both questions: Oha Ka = K, = %3D 1– sind Ка 1+ sino 1 + sino Kp 1 – sino For the wall described in the previous question, assume that due to poor drainage the water table rises to 2.5 m below the surface. Determine the new determine the total active earth thrust of the wall per lineal metre, and the height above the base of the wall at which the thrust acts.
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