15.1 Refer to the infinite slope shown in Figure 15.47. Given: ß = 25°, y = 17.8 kN/m³, ' = 28°, and c' = 31 kN/m². Find the height, H, such that a factor of safety, F, of 2.75 is maintained against sliding along the soil-rock interface. H Y $' Rock ⒸCengage Learning 2014 Figure 15.47 15.2 For the slope shown in Figure 15.47, determine the height, H, for critical equilibrium. Given: B = 30°, y = 18.05 kN/m³, ' = 21°, and c' = 14.3 kN/m³. ß

15.1 Refer to the infinite slope shown in Figure 15.47. Given: ß = 25°, y = 17.8 kN/m³, ' = 28°, and c' = 31 kN/m². Find the height, H, such that a factor of safety, F, of 2.75 is maintained against sliding along the soil-rock interface. H Y $' Rock ⒸCengage Learning 2014 Figure 15.47 15.2 For the slope shown in Figure 15.47, determine the height, H, for critical equilibrium. Given: B = 30°, y = 18.05 kN/m³, ' = 21°, and c' = 14.3 kN/m³. ß

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter15: Slope Stability

Section: Chapter Questions

Problem 15.11P

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Q.3. A cut slope was excavated in a saturated clay with a slope angle β = 57 ͦ with the horizontal. Slope failure occurred when the cut reached a depth of 8 m. Previous soil explorations showed that a rock layer was located at a depth of 2 m below the ground surface. Assuming an undrained condition and that ɣsat = 19 kN/m3 : Determine the undrained cohesion of the clay (Fig 3). What was the nature of the critical circle? With reference to the top of the slope, at what distance did the surface of the sliding intersect the bottom of the excavation?
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