Calculate the magnitude and location of the active thrust on the wall.

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Chapter 16, Problem 16.17P

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Calculate the magnitude and location of the active thrust on the wall.

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1. Refer to Figure below For H = 6 m, y = 17.0 kN/m³, o' = 36°, c' = 0, ß = 85°, a = 10°, and 8' = 24°, assume that the backfill is in the active state and use Coulomb’s equation to determine the magnitude, location, and direction Pa of the active thrust on the wall. H 2. what would be the active thrust Pa there is a surcharge of 25 kN/m² at the ground level? when

Question 3: A 4.5 m high wall with groundwater 1.5 m below from the top behind the wall has sandy backfill as shown. The bridge structure in front of the wall (which is not shown on the figure) prevents wall from movements. Calculate: a) the lateral force behind the wall exerted on the wall. b) the distance from the base of the wall to the center of this force. Bridge. 4.5 m 1.5 m y = 17 kN/m³ Ysat = 19 kN/m3 Sand c'= 0 $' = 37°

13.2 Assume that the retaining wall shown in Figure 13.9 is frictionless. Determine the Rankine active force per unit length of the wall, the variation of active earth pressure with depth, and the location of the resultant. If H = 4m, Ø = 36° and y = 18 kN/m3 kN Ans. P, = 37.44", z = 1.33m m 13.3 Assume that the retaining wall shown in Figure 13.9 is frictionless. Determine the Rankine passive force per unit length of the wall, the variation of lateral earth pressure with depth, and the location of the resultant. If H = 5m, Ø = 35° and y = 14 kN/m? Ans. Pp 645.8 kN z = 1.67m m. Sand Unit weight = y (or density = p) %3D H c' = 0 8' (angle of wall friction) = 0 Figure 13.9