EBK FOUNDATION DESIGN
3rd Edition
ISBN: 9780100663039
Author: YEUNG
Publisher: YUZU
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Textbook Question
Chapter 2, Problem 2.7QPP
Using the data shown in Figure 2.5 determine the probability that the tangent of the friction angle for the mudstone at the Confederation Bridge site is less than 0.25.
Figure 2.5
Histogram of tangent of residual friction angle of mudstone at the Confederation Bridge site, Canada.
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A plate-bearing test is performed on soil near the surface of a granular stratum in order to determine the modulus of vertical subgrade reaction. The load versus settlement information appears as a straight line on a graphical plot. At a point where the load is 5 tons/ft2, the indicated settlement is 0.5 in. What is the value for the modulus of vertical subgrade reaction?
The following data are from a direct shear test on an undisturbed soil sample. Represent the data by a Mohr Circle and compute the minor principal stress. Normal pressure = 16.2 kN/m2; Tangential pressure = 14.4 kN/m2, Angle of internal friction = 24°; c = 7.2 kN/m2. Show diagram. Note: the answer must be in the choices
a. 26.25
b. 38.77
c. 57
d. 6.77
Subject: Soil Mechanics
Please provide a solution and a diagram.
A cylindrical sample of soil having a cohesion of 80 kN/m2 and an angle of internal friction of 20°is subjected to a cell pressure of 100 kN/m2. Determine the maximum deviator stress at which the sample will fail in kPa.
a. 333
b. 387
c. 255
d. 246
Chapter 2 Solutions
EBK FOUNDATION DESIGN
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- A sample of dry, cohesionless soil has an angle of internal friction of 35°. If the minor principal stress is15 lb/in2, at what values of deviator stress and major principal stress is the sample likely to fail? KINDLY GET THE RIGHT ANSWER WITH EXPLAINATION STEPSarrow_forward19. A sample of soil was subjected to a series of tri-axial tests. The results were as follows. Test No. σ3 (kPa) σ1 (kPa) 1 120 190 2 172 266 a. Which of the following most nearly gives the angle of friction of the soil?b. Which of the following most nearly gives the cohesion of the soil/?arrow_forwardSITUATION 14: After conducting a tri-axial test on a sand sample, the normal and shearing stresses on the failure plane at failure were found to be 400 kPa and 350 kPa respectively.48. Which of the following gives the angle of shearing resistance? a. 38.79 b. 41.19 c. 48.81 d. 53.949. Which of the following most nearly gives the angle of failure plane measured from the major principal plane?a. 69.41 b. 64.40 c. 71.99 d. 65.5950. Which of the following most nearly gives the major principal stress? a. 1331.51 Kpa b. 1414.58 Kpa c. 1130.37 Kpa d. 1171.32 Kparrow_forward
- Compute the cohesion of the clay. The results of a three consolidated undrained tri-axial tests on a saturated clay are as follows : a. 10.45 kPab. 12.25 kPac. 11.62 kPad. 15.62 kPaarrow_forwardDirect shear test was conducted on soil specimen. It was observed that the specimen failed when V = 137KPa and P = 268KPa. In other soil sample, it failed at V = 210KPa and P = 412KPa. Determine the cohesion of the soil? Determine the internal angle of friction? What is the axial compressive stress when V = 243KPaarrow_forwardFor a laboratory consolidation test on a clay specimen (drained on both sides) the following results were obtained: Thickness of clay soil= 25 mm; P1 = 50 kPa; P2 = 120 kPa; e1 = 0.92; e2 = 0.78; Time for 50% consolidation= 2.5 min. Tv = 0.197. Determine the coefficient of compressibility in m2/kN.include fbd pls.arrow_forward
- In a tri-axial test of silty soil, the sample failed at normal stresses of 521 kPa and a shear stress of 200 kPa. 1. Find the angle of internal friction. a. 23° b. 19° c. 21° d. 22° 2. Compute the angle that the failure plane makes with the x-axis a. 55.5° b. 61.6° c. 61.7° d. 45.3° 3. Compute the maximum failure stress. a. 781 kPa b. 510 kPa c. 838 kPa d. 812 kPaarrow_forwardA cylindrical sample of saturated clay 4 cm in diameter and 8 cm high was tested in an unconfined compression apparatus. Find the unconfined compression strength, if the specimen failed at an axial load of 360 N, when the axial deformation was 8 mm. Find the cohesion in kPa if the angle made by the failure plane with the horizontal plane was recorded as 50°. Include free body diagram. a.312 b.106 c.258 d.210arrow_forwardIn the deposit shown in the accompanying figure the groundwater level was originally at the ground surface. The water table was lowered by drainage to a depth of 25 ft., whereupon the degree of saturation of the sand above the lowered water table decreased to 20 percent. 1. What is the effective vertical stress at the mid height of the clay layer before lowering the water table? a. 4350 psf b. 4560 psf c. 3500 psf d. 6400 psf 2. What is the effective vertical stress at the mid height of the clay layer after lowering the water table? a. 4343 psf b. 4557 psf c. 5530 psf d. 6452 psf 3. What is the effective vertical stress at the mid height of the clay layer after lowering the water table to a depth of 50 ft? a. 5580 psf b. 6710 psf c. 3680 psf d. 5860 psfarrow_forward
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