3.2 A soil profile is shown in Figure P3.2, along with the standard penetration numbers in the clay layer. Use Eqs. (3.8b) and (3.9) to determine the variation of Cu and OCR with depth. What is the average value of c,, and OCR? 1.5 m 1.5 m Figure P3.2 1.5 m 1.5 m Water table ¥ .8 1.5 m * 1.5 m N60 5 A 8 .9 10 Dry sand y = 16.5 kN/m³ Sand Ysat = 19 kN/m³ Clay Ysat 16.8 kN/m³ Sand

3.2 A soil profile is shown in Figure P3.2, along with the standard penetration numbers in the clay layer. Use Eqs. (3.8b) and (3.9) to determine the variation of Cu and OCR with depth. What is the average value of c,, and OCR? 1.5 m 1.5 m Figure P3.2 1.5 m 1.5 m Water table ¥ .8 1.5 m * 1.5 m N60 5 A 8 .9 10 Dry sand y = 16.5 kN/m³ Sand Ysat = 19 kN/m³ Clay Ysat 16.8 kN/m³ Sand

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.20P

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3.3 A soil profile is shown in Figure P3.3 along with the stan- dard penetration numbers in the clay layer. Use Eqs. (3.8b) and (3.9) to determine the variation of c, and OCR with Cu depth. What is the average value of c, and OCR? Cu 1.5 m 1.5 m 1.5 m 1.5 m 1.5 m Groundwater 1.5 m table N60 5 A.8 8 ●9 10 Dry sand y = 16.5 kN/m³ Sand Ysat = 19 kN/m³ Clay Ysat = 16.8 kN/m³ Sand
P-1 A soil profile is shown in Figure along with the standard penetration numbers in the clay layer. Use provided equations to Dry sand y = 16.5 kN/m³ 1.5 m Groundwater table Sand 1.5 m N60 Ysat = 19 kN/m³ determine the variation of 1.5 m • 8 Cu and OCR and preconsolidation pressure o', with depth. What is the average value of c, and OCR? Clay 1.5 m Ysat = 16.8 kN/m³ * A•8 1.5 m • 9 1.5 m 10 Sand 0.689 0.29N0.72 Pa Си N60 OCR = 0.193 o = 0.47NPa %3D %3D Shahid Chamran University of Abvaz 1 ר ר ררפ
A soil profile is shown in Figure P3.2 along with the standard penetration numbers in the clay layer. Use Eqs. (3.8) and (3.9) to determine the variation of cu and OCR with depth. What is the average value of cu and OCR?
In a drained triaxial test on consolidated clay the stress and angle are as follows: Deviator stress is 20 1b/in2 and friction angle is 210 . Calculate the effective confining pressure at failure.? A) 21 1b/in2 B) 22.2 1b/in2 C) 25.4 1b/in2 D) 17.9 1b/in2
4. In a consolidated-drained triaxial test on a clay that is normally consolidated, the results are as follows: O3 = 15 lb/in 2 (Aoa)f = 11 lb/in? (Aua)f = 7.2 lb/in? a) Determine the consolidated-undrained friction angle. %3D b) Calculate the drained friction angle.
In a deposit of normally consolidated dry sand a cone penetration test was conducted. Following are the result: Depth(m) Point resistance of cone, qc (MN/m²) 1.5 2.06 3.0 4.23 4.5 6.01 6.0 8.18 7.5 9.97 9.0 12.42 Assuming the dry unit weight of sand to be 16kN/m³, estimale the average peak friction angle, ф’, fo the sand. Use ф’=tan ¯1((0.38+0.27log(qc/ σ’o))
2.2 A consolidated-drained triaxial test was conducted on a normally consolidated clay. The results are: 03=140 kN/m? (Aga) f=104KN/m2 Please determine oi and 3.
Settlement in (2) to occur. Q6: A saturated clay sample was consolidated in the triaxial cell under a cell pressure of 150 kN/m². The drainage valve was then closed and the deviator stress was quickly increased to 200 kN/m² when failure occurred. If c = 15 kN/m² and 4 =20, find the pore water pressure and Skempton's pore pressure coefficient A at failure.
There is an upward flow of 0.06 ml/s through a sand sample with a coefficient of permeability 3 × 10^–2 mm/s. The thickness of the sample is 150 mm and the cross-sectional area is 4500 mm2.Determine the effective stress in N/m2 at the bottom the sample, if the saturated unit weight of the sample, is 18.9 kN/m3. Provide Diagram a.709.5 b.177.38 c.88.69 d.354.75
Water flows at the rate of 0.09 ml/s in an upward direction through a sand sample with a coefficient of permeability of 2.7 × 10^–2 mm/s. The thickness of the sample is 120 mm and the area of cross-section is 5400 mm2. Taking the saturated unit weight of the sand as 18.9 kN/m3, determine the effective pressure in Pa at the bottom of the sample. a. 364 b. 728 c. 182 d. 910
3.15 In a deposit of normally consolidated dry sand, a cone pen- etration test was conducted. Following are the results: 316 Depth (m) 1.5 3.0 4.5 6.0 7.5 9.0 Point of resistance of cone, q. (MN/m²) 2.06 4.23 6.01 8.18 9.97 12.42 Assuming the dry unit weight of sand to be 16 kN/m³, estimate the average peak friction angle, d', of the sand. Use Eq. (3.56). Rofar
A standard penetration test was carried out in a normallyconsolidated sand at 25 ft depth where the N60 was determinedto be 28. The unit weight of the sand is 110 lb/ft3, andthe grain-size distribution suggests that D50 5 1.2 mm andCu 5 3.2. The age of the soil since deposition is approximately5000 years. Determine the relative density using thedifferent correlations discussed in Section 3.15