Question

2. (50 pts) A Mechanically Stabilized Earth (MSE) wall is to be constructed as shown in the figure below. Answer the following questions regarding this wall. What is the Rankine

active earth pressure coefficient that should be used? What is the magnitude, direction, and height of the lateral pressure resultant (F.)? What are the magnitudes of the horizontal and vertical components of thelateral pressure resultant? c) (10 pts) What is the total overturning moment if the reference point is placed at thetoe of the wall? (10 pts) What is the total resisting moment if the reference point is placed at the toeof the wall? e) (5 pts) Does the wall meet the minimum factor of safety for overturning (2.0)? f) (5 pts) Does the wall meet the minimum factor of safety for sliding (1.5)? **For sliding resistance calculations, assume that the friction angle of the bearing soil is less than that of the soil in the reinforced zone. Therefore, the coefficient of friction at the base of the wall will be governed by the friction angle of the bearing soil (=28 deg).

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