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 12, Problem 12.23P
(a)
To determine
Find the undrained cohesion at a depth of
(b)
To determine
Find the design value of undrained shear strength by using Bjerrum’s correction factor.
(c)
To determine
Find the new undrained cohesion.
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SITUATION 5: A sand sample is subjected to
direct shear testing at it's (in - situ) water
content. Two tests are performed. For one of
the tests, the sample shears at a stress of 400
kPa when the normal stress is 600 kPa. From
these data,
15. Determine the value of the apparent
cohesion.
c. 230 kPa
d. 221 kPa
а. 100 kPa
b. 179 КРа
16. Determine the corresponding angle of
internal friction.
a. 22.65 degrees
b. 26.57 degrees
c. 32.54 degrees
d. 18.43 degrees
The results of a consolidated drained triaxial shear test on a normally consolidated clay are shown in the figure. The angle of internal friction is:--
: A specimen of normally consolidated clay is consolidated to 722 kN/m² and
then failed by increasing o, while o, held constant. Find qr and Prif Ø= 26°.
A cylindrical sample of soil soil having a cohesion of 100 kN/m² and angle of
internal friction of 22° is subjected to cell pressure (63) of 80 kN/m².
Determine:
1) Maximum deviator stress at which the sample will failed.
2) Angle made by the failure plan with the axis of sample.
3) Normal and shear stress on failure plan.
Chapter 12 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 12 - Prob. 12.1PCh. 12 - Prob. 12.2PCh. 12 - Prob. 12.3PCh. 12 - Prob. 12.4PCh. 12 - Prob. 12.5PCh. 12 - Prob. 12.6PCh. 12 - Prob. 12.7PCh. 12 - Prob. 12.8PCh. 12 - Prob. 12.9PCh. 12 - Prob. 12.10P
Ch. 12 - Prob. 12.11PCh. 12 - Prob. 12.12PCh. 12 - Prob. 12.13PCh. 12 - Following are the results of...Ch. 12 - Prob. 12.15PCh. 12 - Prob. 12.16PCh. 12 - Prob. 12.17PCh. 12 - Prob. 12.18PCh. 12 - Prob. 12.19PCh. 12 - Prob. 12.20PCh. 12 - Prob. 12.21PCh. 12 - Prob. 12.22PCh. 12 - Prob. 12.23PCh. 12 - Prob. 12.24PCh. 12 - Prob. 12.1CTP
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- In a series of unconsolidated-undrained triaxial tests on speciments of a fully saturdated clay, the following results were obtained at failure. Calculate the following:a. Cohesionb. Angle of internal frictionarrow_forwardUrgently requiredarrow_forwardA direct shear test, when conducted on a remolded sample of sand, gave the following observations at the time of failure: Normal load = 288 N; shear load = 173 N. The cross-sectional area of the sample = 36 cm2. Determine the minor principal stress in kPa. Pls include fbd.arrow_forward
- Subject : Geotechnical Engineering If you don't know the solution please leave it. Give me all right solutionsarrow_forwardPlease solve step by step clearlyarrow_forwardSolve this problem graphically and then analytically. A CU triaxial test was performed on a dense sand specimen at a confining pressure 03=40 kPa. The consolidated undrained friction angle of the sand is =39°, and the effective friction angle is d'=34°. Calculate: (a) the major principal stress at failure, o1, (b) the minor and the major effective principal stresses at failure, o'3f and oʻır, and (c) the excess pore water pressure at failure, (Aua)f.arrow_forward
- The stresses on a failure plane in a drained test on a cohesionless soil are as given below: Normal stress, o = 100 kN/m2, Shear stress = 57.73 kN/m2 The failure plane makes an angle of B with the minor principle plane. The value of B will bearrow_forwardhe following results were obtained from a direct shear test conducted on pure sand: Sample height and diameter = 30 mm and 75 mm respectively. Normal stress = 100 kN/m2 Shear force at failure = 185 N a) Determine the angle of friction for the soil. Round off to one decimal i.e. 99.5! b) What would be the shear force (in N) at failure if the normal stress is 175 kN/m2? Round off to the nearest figure i.e. 300.55 to 301! c) What would be the principal stress at failure? Consider a and barrow_forwardA direct shear test, when conducted on a remolded sample of sand, gave the following observations at the time of failure: Normal load = 288 N; shear load = 173 N. The cross-sectional area of the sample = 36 cm2. Determine the major principal stress in kPa. a.174.6 b.246.5 c.163.5 d.146.9arrow_forward
- A series of previous CD tests conducted on a NC clay has established that the ultimate effective friction angle of the clay is 300. Now a CU test is conducted on this soil with an effective cell pressure of 100 kPa. The specimen fails at a deviatoric stress of 100 kPa. Estimate the pore pressure at failure. Given: σ3f′=Kaσ1f′whereKa=1−sinϕ1+sinϕ Please do fast .... ASAP Fastarrow_forwardYarrow_forwardVane Shear Testingarrow_forward
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