Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Question
Chapter 13, Problem 13.5P
To determine
Find the factor of safety against sliding along plane AB.
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Please answer 15.15
Please calculate the critical factor of safety for the following slope configuration using the following m
ethods: Using slope stability charts
Layer 1
Clay
c=35 kN/sq.m
Friction Angle=0
Unit Weight-18 kN/cu.m
Layer 2
Silty Sand
c=5 kN/sq.m
Friction Angle=35 deg
Unit Weight=18 kN/cu.m
Slope Height=10 m
Slope Angle=30 Degrees
Layer 1
6. Plot the variation of Ovo, Dovo and u with depth for the soil profile overleaf.
4 m
Sand
Ym = 17.5 kN/m³
2 m
Ym = 17.0 kN/m3
Sandy gravel
3 m
Ysat = 19.5 kN/m3
3 m
Clay
Ysat = 19.0 kN/m³
%3D
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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- e 120 m GL. 118 m GWL (2) A ground soil profile is shown in the right 7 Y =19 KN/m³ Y-21 KN/m³ figure. Soil layer information and their unit weights clay v 116 m are presented in the figure. The groundwater level Y-20 KN/m³ sand is 2 m below the ground surface. Find the vertical 111 m. effective overburden aressure and plot its clay Y=21 KN/m³ distribution curve. 107 m.arrow_forwardsolve the question provided in the image.arrow_forward(Note:Depth of rock layer is 2m not 12 m.) Q 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 = 21 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?arrow_forward
- Geotechnical engineeringarrow_forwardA soil excavation was done until 4m below the surface of the soil. It was identified that the shallow ground water level is 2m below the ground level and the upper is dry. The properties of the soil are: Gs = 2.7, e = 0.50, and ϕ’ = 30degrees. Assuming no seepage. What is the value of the in-situ soil’s unit weight above G.W.T. in kN/m3? What is the maximum neutral stress at the deepest point of excavation in kPa? What is the value of the total stress of soil at the surface of the ground water table in kPa? What is the value of the effective stress at the deepest point of excavation in kPa?arrow_forwardA 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_forward
- 16.9 Use Taylor's method to determine the factor of safety of the slope shown in Figure P16.9. 1 Very stiff clay FIGURE P16.9 $ = 20 kPa 18 kN/m²arrow_forwardSand is placed on a rock slope, as shown in Figure Q2. (a) Show that sand will be stable (i.e., no sliding sliding) ifarrow_forwardA cut is made into a homogeneous soil as depicted in the figure below, at an angle of 60° with the horizontal. Calculate the resisting shear force in kN along the failure plane given that the shear force applied by the overlying soil wedge is 120 kN. The failure plane is at an angle of 40° from the horizontal direction and the ground water level is below this plane. Assume drained conditions for this question.arrow_forward4. A slope is 5 m high and has an angle of 45°. The soil parameters of the soil are: c'= 18 kN/m?, O'=15° and y = 17.1 kN/m³. Determine the factor of safety, Fs, using Michalowski's (2002) kinematic approach for c'-o' soils.arrow_forwardCENTER OF FAILURE CIRCLE soil 1 unit weight = 16 kN/m3 c = 20 kPa ' = 25 deg soil 2 unit weight = 18 kN/m3 c = 30 kPa = 35 deg Scale 1 cm = 2m Figure shows an embankment consisting of two soils with the given soil properties. There is no ground water table in the vicinity. (a) Calculate the factor of safety using the Ordinary Method of Slices (b) Assuming a factor of safety of 1.5, perform one iteration to calculate factor of safety using the Bishop?s Method of Slicesarrow_forward= A soil profile at a site consists of a 5 m of gravelly sand (ysat = 18.5 kN/m³; ym 17.0 kN/m³) layer underlain by 4 m of sandy gravel (Ysat = 18.0 kN/m³). The water table is 4 m below the ground level. Plot the variation of ov, o'v, and u with depth. Neglect the capillary effects.arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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