Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Question
Chapter 13, Problem 13.22P
(a)
To determine
Find the magnitude of active pressure
(b)
To determine
Find the Rankine active force
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Q 11.6
12.3
Refer to Figure 12.12a. Given: H = 4 m, y = 16.5 kN/m³, ' = 30°, c' = 0, and
B = 85°. Determine the Coulomb's active force per meter length of the wall
and the location and direction of the resultant for the following cases:
a. a 10° and 8' = 20°
b. a = 20° and 8' = 15°
For the frictionless wall shown in Figure No 1, Calculate the following:
(a) The active lateral earth pressure distribution with depth.
(b) The passive lateral earth pressure distribution with depth(c) The magnitudes and locations of the active and passive forces.
(d) The resultant force and its location.
(e) The ratio of passive moment to active moment.
Note: UDL should be considered as mentioned in the figure
Chapter 13 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 13 - Prob. 13.1PCh. 13 - Prob. 13.2PCh. 13 - Prob. 13.3PCh. 13 - Prob. 13.4PCh. 13 - Prob. 13.5PCh. 13 - Prob. 13.6PCh. 13 - Prob. 13.7PCh. 13 - Prob. 13.8PCh. 13 - Prob. 13.9PCh. 13 - Prob. 13.10P
Ch. 13 - Prob. 13.11PCh. 13 - Prob. 13.12PCh. 13 - Prob. 13.13PCh. 13 - Prob. 13.14PCh. 13 - Prob. 13.15PCh. 13 - Prob. 13.16PCh. 13 - Prob. 13.17PCh. 13 - Prob. 13.18PCh. 13 - Prob. 13.19PCh. 13 - Prob. 13.20PCh. 13 - Prob. 13.21PCh. 13 - Prob. 13.22PCh. 13 - Prob. 13.23PCh. 13 - Prob. 13.24PCh. 13 - Prob. 13.25PCh. 13 - Prob. 13.26PCh. 13 - Prob. 13.27PCh. 13 - Prob. 13.1CTP
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- 13.22 Consider the retaining wall shown in Figure 13.38. The height of the wall is 9.75m. and the unit weight of the sand backfill is 18.7kN/m3. Using Coulomb's equation, calculate the active force, Pa, on the wall for the following values of the angle of wall friction. Also, comment on the direction and location of the resultant.arrow_forwardPlease answer 13.9arrow_forwardWhere, X=36 A retaining wall (frictionless) is shown in a) Plot the variation of active and passive lateral pressures with depth for soil profile shown in Fig.1 b) Determine the force due to surcharge in active side c) Compute Total active force on the wall if the wall is 9m long d) Evaluate the lateral stability of the wall by comparing the forces acting on the wallarrow_forward
- Please answer 13.13arrow_forward1. 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? whenarrow_forward14.9 In Figure 14.13a, let H = 6 m, y = 16.5 kN/m², o' = 30°, 8' = 20°, c' = 0, a = 10°, and ẞ = 80°. Determine the Coulomb's active force per meter length of the wall and the location and direction of the resultant force.arrow_forward
- Please only solve 12.15 PLEASE EXPLAIN TO ME HOW TO FIND THE LOCATION OF THE RESULTANT, I don't know how to take the moment about the buttom for each area, please explain, thank youarrow_forwardDetermine the active lateral earth pressure on the frictionless wall shown in the figure below. Sketch the lateral earth pressure distributions and calculate the resultant force and its location from the base of the wall. Also, determine the moments of passive and active forces. Neglect seepage effects. Use Rankine's earth pressure method. (w = 10 kN/m) 3.0m Ysat 20 kN/m³ y = 19 kN/m²³ ' = 30° Ysat = 20 kN/m³ y = 18 kN/m³ o = 28 6.0marrow_forwardDetermine the lateral earth pressure force on the wall (6.0 m height shown in the figure. Draw the stress distribution and locate the location of the resultant force. Sandy soil kN Ye = 20 O = 36.0°arrow_forward
- 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 13.9arrow_forward3. Calculate and draw to scale the earth pressures along the back of the retaining wall in the Figure 1. Then calculate the over-turning moment around point o . p = 1800 kg/m3 C = 0 kPa 1.5m P = 22 p = 1600 kg/m³ c =15 kPa O = 18 1.5m 0.5m Point O 0.5m 1m Figure 1arrow_forwardRefer to Problem 12.3.a. Draw the Rankine passive pressure distribution diagram behind the wall.b. Estimate the Rankine passive force per foot length of the wall and also the location of the resultant.arrow_forward
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