Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 13, Problem 13.5P
To determine
Find the increase in lateral earth pressure
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Where, 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
wall
A 10-m retaining wall is shown in figure A, determine:
a. The active thrust on the wall due to soil and water
b. The active thrust on the wall due to soil only [dry]
c. The increase in force on the wall if the soil is fully saturated with rainwater.
Determine the total active thrust, in kN/m, for a retaining wall (height 5.12 m.) with horizontal backfill given the following properties: Unit weight = 17.79 kN/m3, Angle of internal friction = 30°, Cohesion = 11.71 kPa, and Surcharge = 9.33 kPa.
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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- Determine the total active thrust, in kN/m, for a retaining wall (height 5.60 m) with horizontal backfill given the following properties: Unit weight = 17.42 kN/m3, angle of internal friction = 32 degrees, Cohesion = 11.76 kPa, Surcharge = 9.32 kPa.arrow_forwardDetermine the active thrust pressure for the backfill soil having an internal friction angle of 35° and unit weight of 110 lb/ft3. The height of the retaining wall is 18 ft.arrow_forwardDetermine the passive thrust pressure for the backfill soil having an internal friction angle of 35° and unit weight of 110 lb/ft3. The height of the retaining wall is 18 ft.arrow_forward
- Q.9 A smooth retaining wall is 4 m high and supports a cohesive backfill with a unit weight of 17 kN/m3. The shear strength parameters of the soil are cohesion =10 kPa and Ø = 10°. Calculate the total active thrust acting against the wall and the depth to the point of zero lateral pressurearrow_forwardProblem: The cantilever retaining wall shown in the figure resists active lateral earth pressure throughout its length. 1. Calculate the total lateral force on the wall due to active pressure in KN2. Determine the overturning moment due to lateral earth pressure in KN-m.3. Determine the resisting overturning moment in KN-marrow_forwardQ.4 A 6 m tall cantilever wall retains a soil that has the following properties: c' = 0, Ø = 30o, and ϒ= 19.2 kN/m3.The ground surface behind the wall is inclined at a slope of 3 horizontal to 1 vertical, Determine the active forces acting on the back of this wall using coulomb’s theory.arrow_forward
- A retaining wall 6m. high is to support a horizontal backfill. The upper 3m. of backfill has a unit weight of 16kN/m3, angle of friction of 30 degree. Water table is located 3m. below the ground surface and the saturated unit weight of the soil below the water tale is 19kN/m3 with an angle of friction of 36 degree. It carries a uniform surcharge of 25 kN/m2. 1. Compute the Rankine active force per unit length of the wall assuming that the wall can yeild sufficientlyto develop active state. 2. Compute the location of the resultant line of action from the bottom of the wall. 3. Compute the moment due to the resultant active force.arrow_forward45.) A retaining wall supports a horizontal backfill that is composed of two types of soil. First layer: 5.91 meters high, Unit weight of 17.26 kN/m3, coefficient of active pressure of 0.291 Second layer: 5.36 meters high, Unit weight of 18.85 kN/m3, coefficient of active pressure of 0.301 Determine the distance of the total active force measured from the bottom of the wall. Round off to three decimal places.arrow_forwardA wall 6m high retains sand having a dry density of 15.40 KN/m3. Angle of internal friction of 32' and void ratio of 0.68. Use rankine theory. a. Determine the active thrust in kN per unit length of wall if there's ground water table located 2.5m below the ground. b. Determine the location of resultant thrust from the ground surface considering the ground water table located 2.5m below the ground.arrow_forward
- A retaining wall with vertical backfill of height 10m supports a cohesion less soil of unit weight 17.3 kN/m3 and an angle of shearing resistance =30 degree the surface is horizontal determine The magnitude of the active lateral pressure at the toe of the wall The point of application of the force The active force exerted on the wallarrow_forwardA retaining wall 7 m high, with its back face smooth and vertical. It retains sand with its surface horizontal. Using Rankine’s theory, determine the active earth pressure at the base when the backfill is submerged with water table at the surface. Take γ=18 kN/m^3 ,ϕ=30°, γ_sat=21 kN/m^3.arrow_forwardQUESTION 4. A retaining wall 6 m high with a vertical back face retains a homogenous saturated soft clay. The saturated unit weight of the clay is 19 kN/m3. Laboratory tests showed that the undrained shear strength, Cuof the clay is 16.8 kN/m3, f=0o. Do the necessary calculations and draw the variations of Rankine’s passive pressure on the wall with depth Determine the total passive force per unit length of the wall. Find the location of the resultant force?arrow_forward
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