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14.1 State whether the following are true or false. a. Cantilever retaining walls do not have steel reinforcements. b. Cantilever retaining walls have smaller cross sections than gravity retaining walls. c. Adhesion at the base of the retaining wall is generally less than the cohesion of the soil beneath the base.

14.1 State whether the following are true or false. a. Cantilever retaining walls do not have steel reinforcements. b. Cantilever retaining walls have smaller cross sections than gravity retaining walls. c. Adhesion at the base of the retaining wall is generally less than the cohesion of the soil beneath the base.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Q 14.2
Signat Problems 35 = 0 II Figure 14.20 factor of safetty with respect to overturning and sliding and bearing capacity. Use Rankine active pressure for the caleulation. 14.6 Repeat Problem 14.5. Use Coulomb's active pressure calculation and d = 6
Transcribed Image Text:Signat Problems 35 = 0 II Figure 14.20 factor of safetty with respect to overturning and sliding and bearing capacity. Use Rankine active pressure for the caleulation. 14.6 Repeat Problem 14.5. Use Coulomb's active pressure calculation and d = 6
14.1 State whether the following are true or false. a. Cantilever retaining walls do not have steel reinforcements. b. Cantilever retaining walls have smaller cross sections than gravity retaining walls. c. Adhesion at the base of the retaining wall is generally less than the cohesion of the soil beneath the base. d. Provision of a key at the base of the wall reduces the passive resistance. e. The pressure distribution beneath the base of a retaining wall is never uniform. For Problems 14.2 through 14.6, use kj = k2 =f and P, = 0 while using Eq. (14.10). 14.2 For the cantilever retaining wall shown in Figure 14.20, the wall dimensions are H = 24 ft, X1 = 1.2 ft, x2 = 1.8 ft, x3 = 4.5 ft, x, = 10 ft, xs = 3 ft, D = 5.25 ft, and a = 10°. The soil properties are Yi = 107 lb/ft', o Calculate the factors of safety with respect to overturning, sliding, and bearing capacity. Use unit weight of concrete, y. = 150 lb/ft. 14.3 Repeat Problem 14.2 with the following: 32°, Y2 112 lb/ft', , = 28°, and c = 630 lb/ft?. Wall dimensions: H = 18 ft, x, = 18 in., x, = 30 in., x3 = 4 ft, x4 = 6 ft, x5 = 2.75 ft, D = 4 ft, a = 10° Soil properties: y, = 117 lb/ft", 4{ = 34°, y, = 110 lb/ft', b, = 18°, c' = 800 Ib/f Use unit weight of concrete, Ye = 150 lb/ft". 14.4 Repeat Problem 14.2 with the following: Wall dimensions: H = 22 ft, x, = 12 in., x = 27 in., x3 = 4,5 ft, x4 = 8 ft, xs = 2.75 ft, D = 4 ft, a = 5° Soil properties: y = 110 lb/ft', 6 Use unit weight of concrete, Y. = 150 lb/ft. = 36°, y2 = 120 Ib/ft', 6 = 15°, c = 1000 lb/ft 14.5 The gravity retaining wall shown in Figure 14.21 has wall dimensions of H = 15 ft, x) = 1.5 ft. = 5.25 ft. x, 1.25 ft. x; = 1.5 ft, x, = 2.5 ft, and D = 4 ft, and soil properties = 0.8 ft, x = of y 121 lb/ft, 6 = 30°, Y = 121 lb/ft", 2 = 20°. and c = 1000 lb/ft. Calculate the Lemina All Righte Ruserved May notbe copied, ned, or dupliated, in while or in pari. Due to clectnic ig hts. wmc third party content sed te the eBeok andor t hapterta
Transcribed Image Text:14.1 State whether the following are true or false. a. Cantilever retaining walls do not have steel reinforcements. b. Cantilever retaining walls have smaller cross sections than gravity retaining walls. c. Adhesion at the base of the retaining wall is generally less than the cohesion of the soil beneath the base. d. Provision of a key at the base of the wall reduces the passive resistance. e. The pressure distribution beneath the base of a retaining wall is never uniform. For Problems 14.2 through 14.6, use kj = k2 =f and P, = 0 while using Eq. (14.10). 14.2 For the cantilever retaining wall shown in Figure 14.20, the wall dimensions are H = 24 ft, X1 = 1.2 ft, x2 = 1.8 ft, x3 = 4.5 ft, x, = 10 ft, xs = 3 ft, D = 5.25 ft, and a = 10°. The soil properties are Yi = 107 lb/ft', o Calculate the factors of safety with respect to overturning, sliding, and bearing capacity. Use unit weight of concrete, y. = 150 lb/ft. 14.3 Repeat Problem 14.2 with the following: 32°, Y2 112 lb/ft', , = 28°, and c = 630 lb/ft?. Wall dimensions: H = 18 ft, x, = 18 in., x, = 30 in., x3 = 4 ft, x4 = 6 ft, x5 = 2.75 ft, D = 4 ft, a = 10° Soil properties: y, = 117 lb/ft", 4{ = 34°, y, = 110 lb/ft', b, = 18°, c' = 800 Ib/f Use unit weight of concrete, Ye = 150 lb/ft". 14.4 Repeat Problem 14.2 with the following: Wall dimensions: H = 22 ft, x, = 12 in., x = 27 in., x3 = 4,5 ft, x4 = 8 ft, xs = 2.75 ft, D = 4 ft, a = 5° Soil properties: y = 110 lb/ft', 6 Use unit weight of concrete, Y. = 150 lb/ft. = 36°, y2 = 120 Ib/ft', 6 = 15°, c = 1000 lb/ft 14.5 The gravity retaining wall shown in Figure 14.21 has wall dimensions of H = 15 ft, x) = 1.5 ft. = 5.25 ft. x, 1.25 ft. x; = 1.5 ft, x, = 2.5 ft, and D = 4 ft, and soil properties = 0.8 ft, x = of y 121 lb/ft, 6 = 30°, Y = 121 lb/ft", 2 = 20°. and c = 1000 lb/ft. Calculate the Lemina All Righte Ruserved May notbe copied, ned, or dupliated, in while or in pari. Due to clectnic ig hts. wmc third party content sed te the eBeok andor t hapterta
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