Geotechnical engineering H.DHEnH-Fig. 3 Q.3. A cut slope was excavated in a saturated clay with a slope angle B = 57 °with thehorizontal. Slope failure occurred when the cut reached a depth of 8 m. Previous soilexplorations showed that a rock layer was located at a depth of 2 m below the groundsurface. Assuming an undrained condition and that ysat = 21 kN/m3:a. Determine the undrained cohesion of the clay (Fig 3).b. What was the nature of the critical circle?c. With reference to the top of the slope, at what distance did the surface of the slidingintersect the bottom of the excavation?

Answered: Image /qna-images/answer/ddf210ce-433b-49b7-bdcf-db9a029e92ef.jpg

Answered: DH -nH Fig. 3

Engineering

Civil Engineering

DH -nH Fig. 3

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter17: Engineering Materials

Section: Chapter Questions

Problem 6P

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Question

Geotechnical engineering

Q.3. A cut slope was excavated in a saturated clay with a slope angle B = 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 ysat = 21 kN/m3:
a. Determine the undrained cohesion of the clay (Fig 3).
b. What was the nature of the critical circle?
c. With reference to the top of the slope, at what distance did the surface of the sliding
intersect the bottom of the excavation?

Study of soil under various loading conditions for different structures. The stability of slopes, foundation planning and designing, shear and bearing capacity of soil are common areas of geotechnical engineering.

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