Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 17, Problem 17.11P
To determine
Find the undrained shear strength of the clay.
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Vane Shear Testing
12.12 Following are the results of consolidated-undrained triaxial tests on undisturbed
soils retrieved from a 4-m-thick saturated clay layer in the field (ysat = 19 kN/m³).
a. Estimate graphically the Mohr–Coulomb shear strength parameters c' and ø'.
b. Estimate the shear strength in the middle of the clay layer.
Chamber
Deviator stress,
pressure, o3
(kN/m?)
(Ar),
(kN/m?)
Pore pressure at
failure, (Aud,
(kN/m?)
Test no.
1
100
170
-15
200
260
-40
3
300
360
-80
© Cengage Learning 2014
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Chapter 17 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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Similar questions
- A1arrow_forwardFollowing data are given for a direct shear test conducted on dry silty sand:Specimen dimensions: diameter = 71 mm; height = 25 mmNormal stress: 150 kN/m2Shear force at failure: 276 Narrow_forwardA saturated specimen of cohesionless sand was tested under drained conditions in a triaxial compression test apparatus and the sample failed at a deviator stress of 482 kN/m2 and the plane of failure made an angle of 60° with the horizontal. Find the magnitude of the principal minor stress in kPa at failure for identical specimen of sand if it is tested under a cell pressure of 200 kPa. a.600 b.241 c.723 d.200arrow_forward
- A saturated specimen of cohesionless sand was tested under drained conditions in a triaxial compression test apparatus and the sample failed at a deviator stress of 482 kN/m2 and the plane of failure made an angle of 60° with the horizontal. Find the magnitude of the principal minor stress in kPa. include diagramarrow_forwardIn a drained triaxial compression test conducted on dry sand, failure occurred when the deviator stress was 238kN/m² at a confining pressure of 69kN/m². What is the effective angle of shearing resistance and the inclination of failure plane to major principal plane?arrow_forwardQ- An undrained triaxial compression test is carried out on a saturated clay sample under a cell pressure of 50 kN/m². The sample failed at a deviator stress of 100 kN/m². Find the cohesion of this clay sample.arrow_forward
- In a site consisting entirely of clays, an electric friction conepenetrometer measures the cone resistance qc at a depth of8.0 m as 0.75 MN/m2. The water table is at 3.0 m below theground level. The unit weights of the clay above and belowthe water table are 16.5 kN/m3 and 19.0 kN/m3, respectively.Estimate the undrained shear strength, preconsolidationpressure, and overconsolidation ratio at this depth.arrow_forwardA saturated specimen of cohesionless sand was tested under drained conditions in a triaxial compression test apparatus and the sample failed at a deviator stress of 482 kN/m2 and the plane of failure made an angle of 60° with the horizontal. Find the magnitude of the principal major stress in kPa.arrow_forwardQ-5 c, An undrained triaxial compression test is carried out on a saturated clay sample under a cell pressure of 50 kN/m². The sample failed at a deviator stress of 100 kN/m². Find the cohesion of this clay sample.arrow_forward
- 3.25 In a site consisting entirely of clays, an electric friction cone penetrometer measures the cone resistance q, at a depth of 8.0 m as 0.75 MN/m2. The water table is at 3.0 m below the ground level. The unit weights of the clay above and below the water table are 16.5 kN/m3 and 19.0 kN/m2, respectively. Estimate the undrained shear strength, preconsolidation pressure, and overconsolidation ratio at this depth.arrow_forward7.9 A specimen of soil was collected from a depth of 12 m in a deposit of clay. The ground water table coincides with the ground surface. For the soil, LL= 68, PL = 29, and Ysat = 17.8 kN/m'. Estimate the undrained shear strength S of this clay for the following cases. (a) If the clay is normally consolidated. (b) If the preconsolidation pressure is 191kN/m².arrow_forwardThe following test results at failure conditions are obtained from consolidated undrained triaxial tests on samples from a saturated clay strata. u 03 (pore water (kg/cm²) (kg/cm?) pressure kg/cm? ) Specimen 1 Specimen 2 Determine shear strength parameters. 2.75 1.50 1.50 4.25 2.20 2.0arrow_forward
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