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 13.9P
To determine
Find the height of the slope.
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The Mohr-Coulomb failure criterion is popularly adopted in soil
mechanics analysis. Give an illustrated (with a suitable sketch)
description of this failure criterion, which the inclination of the plane
of failure (0) to the horizontal caused by shear in a soil sample tested
in a standard triaxial test is given by;
e = (45 + ), where Ø' is the angle of effective friction.
2
A 30° slope has a height of 10 m as shown in the figure below. The soil in the slope has the following parameters c = 20 kPa, ϕ = 0°, γ = 18 kN/m . Calculate the factor of safety for the slip surface shown in the figure.
Q4: For the soil element shown, compute the stresses acting on the plane inclined by 40° with the horizontal
plane then draw Mohr circle and place the stresses with respect to O.P.
20kPa
35kPa
100kPa
300
40°
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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- A soil having the average properties, bulk unit weight = 19 kN/m³; angle of internal friction = 25° and cohesion = 15 kPa, is being formed on a rock slope existing at an inclination of 35° with the horizontal. The critical height (in m) of the soil formation up to which it would be stable without any failure is (round off to one decimal place). [Assume the soil is being formed parallel to the rock bedding plane and there is no ground water effect.]arrow_forwardQ2\ Answer T for true statements or F for false ones: 1. The Griffith criterion is seen to have a steeper slope at high confining pressures 2. In a Mohr t-ờ plot the Tresca criterion appears simply as a straight horizontal line. 3. Pore collapse is usually caused by excessive hydrostatic stress. 4. Biot hypothesized that the shear modulus is influenced by the presence of the 5. Pure shear failure depends on the intermediate principle stress. 6. Tensile failure usually occurs when the greatest effective principal stress surpasses the formation rock tensile strength. 7. Failure plane is always inclined at an angle larger than 45° to the direction of oi 8. Unloading path is different from the loading path in perfectly elastic materials. 9. The orientation of the failure plane is independent of the confining stress 10. The modified Griffith criterion is based on the idea that the microcracks will close at sufficiently high pressure levels. pore fluid.arrow_forwardQ.2 The soil profile shown in the figure below consists of a 6 m-thick sand layer underlain by saturated clay where the water table lies 2 m below the ground level. The entire soil mass is retained by a concrete retaining wall and is in the active state. Answer .the next 3 questions 1 m A 2 m Sand (o= 34°) Y = 17 kN/m; = 20 kN/m? 4 m B 1 m 2 m Clay (c'= 20 kPa, o'= 25°) C Ya = 19 kN/marrow_forward
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