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 14, Problem 14.12P
A braced wall is shown in Figure 14.20. Given: H = 7 m, naH = 2.8 m,
Figure 14.20
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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
Q. Result. Thurst
Use 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.
Chapter 14 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- 12.2 ), Figure P12.2, and the following values to determine the at-rest lat- eral earth force per unit length of the wall. Also find the location of the resultant. H = 5 m, H1 = 2 m, H, = 3 m, y = 15.5 kN/m², yt = 18.5 kN/m², 4' = 34°, c' = 0, q = 20 kN/m², . Repeat problem when water level Groundwater at ground surface. Figure P12.2arrow_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_forward13.2 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_forward
- 11.7 A retaining wall is shown in Figure 11.22. Determine the Rankine active force, Pa, per unit length of the wall and the location of the resultant for each of the following cases: a. H = 12 ft, H, = 4 ft, y, = 105 lb/ft, y= b. H = 20 ft, H, = 6 ft, y, = 110 lb/ft, y = 126 lb/ft', oi = 34°, d; = 34°, q = 300 lb/ft 122 Ib/ft', i = 30°, = 30°, q = 0 6 Cengage Learning. All Riphts Reserved. May not be copied, scanned, or duplicated, in whole or in part Due to elsctronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). s deemed that any suppressed content does nol maierially affect the overall learning exnerience Ceneaec ernin neerves the right to mrmove additional.contantarrow_forwardO For the earth retaining structure shown in the figure, determine the total active thrust on the wall, and the point of application of the thrust above the base of the wall. Given H = 5m, = 30°, C = 0, B=90°, h = 2.0 m, Ysat = 18 kN/m³. Ybulk =17 kN/m³ (above water table), q W = 250 kN/m². 5 m Dll. B= 90° q = 250 kN/m² h = 2.0 marrow_forwardProblem 3: A vertical retaining wall 6 m high is supporting a horizontal backfill having a weight 16.5 kN/m and a saturated unit weight of 19 kN/m?. Angle of trictian of the backfill is 30. Ground water table is located 3 m below the ground surface. 1. Determine the at rest lateral earth force per meter length of the wall. 3.0 m 2. Determine the location of the resultant force. 3. Determine the at rest lateral earth force per meter length af the wall if it carries a surcharge of 50 kPa. 3.0 marrow_forward
- A 9.5 m high wall retains a loose soil whose surface slopes downward. Above 15° from the horizontal the soil parameters are = 1.90 ton/m3 and = 32°. Find the thrust on the back per linear meter of wall, using the Rankine method. A) By means of pressure diagram. B) Using the formula proposed by Rankine B = 15° Y = 1.90 ton/m3 C = 0 ton/m2 Ф = 32° H = 9.5 marrow_forwardThe backfill behind a retaining wall, located above the water table, consists of a sand of unit weight 19 kN/m³. The height of the wall is 8 m and the surface of the backfill is horizontal. Determine the total active thrust on the wall according to the Rankine theory if c'=0 and q'=38. If the wall is prevented from yielding, what is the approximate value of the thrust on the wall?arrow_forwardA 6 m high wall retains dry sand whose dry density is 1.95 g/cc and the angle of shearing resistance is 32 degrees. Specific gravity is 2.65. Using Rankine Theory.1. Which of the following most nearly gives the total active thrust on the wall?a. 114.8 kNb. 162.4 kNc. 174.3 kNd. 105.72 kN2. Determine the thrust on the wall in kN per linear meter if due to clogged to a level of 2.5 m below the ground surface.a. 194.453 kNb. 182.567 kNc. 152.220 kNd. 108.765 kN3. At what height above the base of the wall the thrust acts during the wáter clogged condition?a. 2.21 mb. 2.00 mc. 1.75 md. 1.42 marrow_forward
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How to build angle braces; Author: Country Living With The Harnish's;https://www.youtube.com/watch?v=3cKselS6rxY;License: Standard Youtube License