Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 13, Problem 13.2P
To determine
Find the factor of safety of the slope with dry bed rock.
Find the factor of safety under steady state seepage with the water table is at ground level.
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A long slope is formed in a soil with shear strength parameter C' = 0, o' = 34°.
Firm strate lies below the slope and it is assumed that water table may
occasionally rise to the surface, with seepage taking place parallel to the
slope. Use Yeat
= 18 kN/m³ and Y = 10 kN/m³. maximum slope angle (in
degree) to ensure the factor of safety 1.5. Assuming a potential failure
surface parallel to the slope would be
(a) 45.3
(c) 12.3
(b) 44.7
(d) 11.3
Please answer (a)
Thanks for the solution.
Chapter 13 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 13 - Prob. 13.1PCh. 13 - Prob. 13.2PCh. 13 - Prob. 13.3PCh. 13 - Prob. 13.4PCh. 13 - Prob. 13.5PCh. 13 - Prob. 13.6PCh. 13 - Prob. 13.7PCh. 13 - Prob. 13.8PCh. 13 - Prob. 13.9PCh. 13 - Prob. 13.10P
Ch. 13 - Prob. 13.11PCh. 13 - Prob. 13.12PCh. 13 - Prob. 13.13PCh. 13 - Prob. 13.14PCh. 13 - Prob. 13.15PCh. 13 - Prob. 13.16PCh. 13 - Prob. 13.17PCh. 13 - Prob. 13.18PCh. 13 - Prob. 13.19PCh. 13 - Prob. 13.20PCh. 13 - Prob. 13.21PCh. 13 - Prob. 13.22PCh. 13 - Prob. 13.23PCh. 13 - Prob. 13.25PCh. 13 - Prob. 13.26PCh. 13 - Prob. 13.27CTPCh. 13 - Prob. 13.28CTPCh. 13 - Prob. 13.29CTP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Figure 15.47 shows an infinite slope with H = 9.14 m and the groundwater table coinciding with the ground surface. If there is seepage through the soil, determine the factor of safety against sliding along the plane AB. The soil properties are Gs = 2.7, e = 0.8, β = 16°, ϕ′ = 21°, and c′ = 59.8 kN/m2.arrow_forwardQuestion No. 16 A long slope is formed in a soil with shear strength parameters: c' = 0 and d' = 34°. A firm stratum lies below the slope and it is assumed that the water table may occasionally rise to the surface, with seepage taking place parallel to the slope. Use Ysat = 18 kN/m³ and Yw = 10 kN/m³. The maximum slope angle (in degrees) to ensure a factor of safety of 1.5, assuming a potential failure surface parallel to the slope, would bearrow_forwardAn infinite slope consists of bed rock inclined at 15° to the horizontal that is covered by 4 m (measured vertically) soil with ?′=10?N/?2, ?′=24° and ?=19.0?N/?3.a. What is the factor of safety of this slope?b. If there is steady state seepage through the soil, with the water table coinciding with the ground level, what would be the factor of safety? Assume ?sat = 19.0?N/?3.arrow_forward
- Answer is 1.35arrow_forwardStability of slopes.arrow_forwardA long slope is formed in a soil with shear strength parameters: c’ = 0 and ϕ’ = 34⁰. A firm stratum lies below the slope and it is assumed that the water table may occasionally rise to the surface, with seepage taking place parallel to the slope. Use ϒsat = 18 kN/m3 and ϒw = 10 kN/m3. The maximum slope angle (in degrees) to ensure a factor of safety of 1.5, assuming a potential failure surface parallel to the slope, would be most nearly equal to?arrow_forward
- A 9m cut slope is shown in the figure. The unit weight of soil is 17kN/m3. Friction angle and cohesion along the rock surface are 20 degrees and 24kPa respectively. The slope makes an angle of 300 from horizontal and the failure plane is at 150. Determine the developed frictional force on the failure plane.arrow_forwardA long slope is formed in a soil with shear strength parameters: c' = 0 and ' = 34°. A firm stratum lies below the slope and it is assumed that the water table may occasionally rise to the surface, with seepage taking place parallel to the slope. Use Ys 18 kN/m³ and y, = 10 kN/m³. The maximum slope angle (in degrees) to ensure a factor of safety of 1.5, assuming a potential failure surface parallel to the slope, would be w satarrow_forwardAn infinite slope of clay soil has a slope of 29 degrees. The soil has a specific gravity of 2.7 and a void ratio of 0.47. The soil has a depth of 5m over ledge rock measured vertically. Effective friction angle and soil cohesion are 14 degrees and 25kPa respectively. Assuming the ground water table is in the ground surface, determine the limiting depth of this soil, measured vertically over ledge rock. A 1.25m B 5.95m 3.67m D 6.88marrow_forward
- An infinite slope is inclined at 22 degree. A plane of failure has developed at depth of 8 m from the surface. Given dry unit weight = 18kN/m3, c' 12kN/m2, %3D angle of friction = 23.5 degree and saturated unit weight = 23KN/m3. Calculate the slope factor of safety if (i) water table exists far from the slip line O 0.72 O 1.02 О 1.32 1.62 (ii) water table exists at the ground surface 0.4 0.8 O 1.2 О 1.6arrow_forward6.b. A granular soil has ysat = 20KN/m³, o = 30°. A slope has to be made of this soil. If a factor of safety of 1.2 needed against slope failure, determine the safe angle of the slope, i. when the slope is dry or submerged without seepage ii. If seepage occurs parallel to the slope with water table at a depth of 1.5m, what is the factor of safety available on a slope parallel to the ground surface at a depth of 4m? Assume a slope angle of 28°. %3Darrow_forwardPROBLEM: An infinite slope of granular soil has a slope of 23. The saturated unit weight of sand is 21.5 kN/m3 and the effective friction angle is 35. The sand has a depth of 5 m. over a sledge rock. Depth of sand is measured vertically. Compute the factor of safety of the infinite slope of sand layer when subjected to partial seepage parallel to the slope with water at a vertical depth of 3 m. above the sledge rock. H=5m ORÖCK B=23*arrow_forward
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