Given a sample of sand with mean particle size of 0.12 mm and density of 2650 kg/m3 falling in water with viscosity 10-6 m2 /s. (a) Plot (using computer programs with exact scales, values and units on both horizontal and vertical axes; no manual sketches) the evolution of the settling velocity with time, and (b) find the terminal velocity. Check if Stoke’s approximation for drag coefficient is valid and justify

Given a sample of sand with mean particle size of 0.12 mm and density of 2650 kg/m3 falling in water with viscosity 10-6 m2 /s. (a) Plot (using computer programs with exact scales, values and units on both horizontal and vertical axes; no manual sketches) the evolution of the settling velocity with time, and (b) find the terminal velocity. Check if Stoke’s approximation for drag coefficient is valid and justify

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.14P

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2. Text Ishibashi Soil Mechanics Fundamentals and Applications- Ishibashi 420 PAGES.pdf - Adobe Acrobat Reader DC (64-bit) File Edit View Sign Window Help Home Tools 2. Text Ishibashi So... x 199 (225 of 420) 9.3 Terzaghi's consolidation theory assumes (1) specimen is fully saturated, (2) water and solid components are incompressible, (3) Darcy's law is strictly applied, and (4) the flow of water is one dimensional. What will be the most critical shortcomings of these assumptions when the theory is applied to real field conditions? 9.4 A clay specimen was tested in a laboratory consolidation device, which was 12.7 mm (1/2 in.) thick and the top and the bottom boundaries were drained. A 50% consolidation time on the specimen was obtained as 28.4 minutes. Determine the following: (a) Time for 50% consolidation in the field with this soil with a 2.5 m thickness where only the top layer is drained (b) Time for 90% consolidation in the field with this soil with a 2.5 m thickness where only…
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|!;9 ELABORATE Try solving the following problem: Practice Problem: The following are the results of a consolidation test on a sample soil: a. Plot the e-log o' curve b. Using Casagrande's method, determine the preconsolidation pressure. c. Calculate the compression index, Cc e 1.1 1.085 1.055 1.01 0.94 0.79 0.63 Pressure, o' (ton /ft²) 0.25 0.50 1.00 2.00 4.00 8.00 16.00
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Q: I an oedometer test on a specimen of saturated clay (Gs = 2.72), the applied pressure was increased from 107 1o 214 kPa and the following compression readings recorded: TaBLE| Tmen 0 025 05 1 225 4 &5 9 16 Guugelmm) 78 742 732 721 6% 678 &6 643 637 Teme(mi) 25 % 4 s om0 X0 a0 Guge(nm) 629 626 621 618 616 615 610 602 After 1440 min, the thickness of the specimen was 15.30 mm and the water content was 23.2%. Determine the values of the coefficient of consolidation and the compression atios from (a) the root time plot and (b) the log time plot. Determine also the values of the coefTicient of volume compressibility and the coefficient of permeability.
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3- A sand sample is subjected to drainage cutting test with a hollow cylinder device. Rupture occurs with increasing internal pressure while external pressure is constant. At the moment of rupture, the external stress is 200 kPa and the internal stress is 300| Kilopascals - be. Internal and external radii of the sample are 40 and 60 mm. A) Obtain the angle of soil friction. B) At the moment of rupture, what is the axial stress applied to the sample?