Q 14.2 SignatProblems 35= 0IIFigure 14.20factor of safetty with respect to overturning and sliding and bearing capacity. Use Rankineactive 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 soilbeneath 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 soilproperties are Yi = 107 lb/ft', oCalculate the factors of safety with respect to overturning, sliding, and bearing capacity. Useunit weight of concrete, y. = 150 lb/ft.14.3 Repeat Problem 14.2 with the following:32°, Y2112 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/fUse 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', 6Use unit weight of concrete, Y. = 150 lb/ft.= 36°, y2 = 120 Ib/ft', 6 = 15°, c = 1000 lb/ft14.5 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 theLemina All Righte Ruserved May notbe copied, ned, or dupliated, in while or in pari. Due to clectnic ig hts. wmc third party contentsed te the eBeok andor t hapterta

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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.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter15: Retaining Walls, Braced Cuts, And Sheet Pile Walls

Section: Chapter Questions

Problem 15.3P

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