Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 16, Problem 16.18P
For the data given in this problem, determine the magnitude of the active thrust on the wall retaining a c′ – ϕ′ soil, using the procedure discussed in Section 16.10. Given H = 15.0 ft, c′ = 100 lb/ft2, ϕ′ = 26°, γ = 115 lb/ft3, kv = 0, and kh = 0.3.
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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°, Cohesion = 11.76 kPa, and Surcharge = 9.32 kPa. Round off to two decimal places.
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.
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 16 Solutions
Principles of Foundation Engineering (MindTap Course List)
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- A braced wall is shown in Figure 14.20. Given: H = 7 m, naH = 2.8 m, =30, =20, = 18 kN/m3, and c = 0. Determine the active thrust, Pa, on the wall using the general wedge theory. Figure 14.20arrow_forwardA 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.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
- 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 wallarrow_forwardUse Eq. (12.3), Figure P12.2, and the following values to determine the at-rest lateral earth force per unit length of the wall. Also find the location of the resultant. H = 5 m, H1 = 2 m, H2 = 3 m, γ = 15.5 kN/m3, γsat = 18.5 kN/m3, Φ' = 34º, c' = 0, q = 20 kN/m2, and OCR = 1.arrow_forwardThe backfill behind a retaining wall, located above the water table, consists of a sand of unit weight 17 kN/m3. The height of the wall is 6 m and the surface of the backfill is horizontal. Determine the total active thrust on the wall according to Rankine’s theory if f’ = 37o. If the wall is prevented from yielding, what is the approximate value of the thrust on the wall?arrow_forward
- A wall 7m high retains dry sand having a density of 1570 kg/m3 and an angle of shearing resisitance of 34'. Void ratio is 0.60. A. Determine the active thrust in kN per unit length of wall. B. Determine the active thrust in kN per unit length of wall if there is ground water table located 3m below the ground surface. C. Determine the location of the resultant thrust from the bottom of the wall, if there is ground water table located 3m below the ground surface.arrow_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_forwardA smooth gravity wall retains a 12 m-high backfill as shown in the figurebelow. The top 8 m is sand, which is underlain by some clay. The soilproperties are as follows:Sand: γm = 18.9 kN/m 3, γsat = 19.8 kN/m 3; φ' = 32°Clay: γm = 20.1 kN/m 3; φ' = 18°, c' = 20 kPaAssuming that the entire soil is in the active state, find the location andmagnitude of the total thrust on the wall.arrow_forward
- A retaining wall 6 m high supports cohesionless soil having a dry density of 1600 kg/m³, angle of resistance 32 and void ratio of 0.68. The surface of the soil is horizontal and level with the top of the wall. Neglecting wall friction and using Rankine’s formula for active pressure of a cohesionless soil. 1. Determine the nearest value of the total earth thrust on the wall in KN per lineal meter if the soil is dry. a. 73.1 b. 86.7 c. 62.4 d. 98.1 2. Find the nearest value of the thrust on the wall in KN per lineal meter if owing to inadequate drainage, it is waterlogged to a level of 3.5 m below the surface. a. 112 b. 171 c. 147 d. 153 3. Find at what height above the base of the wall the thrust acts during the waterlogged condition. a. 2.21 m b. 2.00 m c. 1.74 m d. 1.42 marrow_forwardA retaining wall is shown in Figure 14.23. Determine Rankine’s active force, Pa, per unit length of the wall and the location of the resultant in each of the following cases: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_forward
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