For the permeability test arrangement shown in Figure Qu2b, the cross-section area of thesoil is 4000 mm? and the evaluated permeability of the soil is 4.0 mm/sec. With reference toDarcy's law, what is the volume of water discharged in 20 minutes in this set up?FlowOverflow375mmDischarge-15mn225mmSoil150mm300mmFigure Qu2b

Answered: Image /qna-images/answer/f8149a64-36b5-4e1e-a9ad-0a0b8f5698b1.jpg

Answered: For the permeability test arrangement…

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.7P

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Problem The saturated soil specimen shown below has a permeability of 0.005 cm/sec, a porosity of 38%, and a cross-sectional area of 22 cm². Two standpipes are placed at points A and B as shown below. The specimen has reached a steady state condition after flushing it with water for 1 hr. Datum ttttt h₁ = 100 cm 50 cm L = 50 cm B 40 cm h₂ = 80 cm Determine: 1. 2. Elevation head (in cm) at points A and B. Pore water pressure (in kPa) at points A and B. 3. Discharge velocity (in cm/sec) through the sample. 4. 5. What is the quantity of flow through the sample in cm³/day? What is the magnitude of the seepage velocity (in cm/sec)? OUT
From the given figure shown, the discharge velocity of the water through the soil is 0.08 em/s. with a void ratio of 0.60, O Compute the coeff. of permeability in cm/sec. ® Compute the seepage velocity in cm/sec. O Compute the seepage force per unit volume.
10:58 Refer to the soil in Problem 4.1. www.bartleby.com = bartleby a D Q&A Sign in Engineering / Civil Engineeri. / P./ Refer to the so.. : Refer to the soil in Problem 4.1... Textbook Problem Refer to the soil in Problem 4.1. a. Determine the flow index. b. Determine the liquidity index of the soil if the in situ moisture content is 21%. 4.1 During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil. Liquid limit tests: Number of Moisture blows, N content (%) 14 38.4 16 36.5 20 33.1 28 270 Plastic limit tests: Students conducted two trials and found that PL = 17.2% for the first trial and PL = 17.8% for the second trial. a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? Use an average value of PL from the two plastic limit trails.
Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C. Also show calculations on how to determine the discharge the K1 and Average K1
A silt clay soil has a plastic limit of 25 and a plasticity index of 30. 70 CH 60 CL U-b RI0.73(L 20) MH |-line OL OF CL-ML ML OH or OL 10 16 20 30 $0 60 70 80. Liquid limit 90 100 a. If the natural water content of the soil is 35%, what is the liquidity index? b. What type of soil is this using the USCS. c. What type of soil is this using the AASHTO system?
Problem 5: Design a aerated grit chamber for a wastewater treatment plant where the incoming average flow rate is 0.8m3/s. Assume • a peak factor of 2.5. • Detention time = 225 sec • Width to Depth ratio = 1.5:1 • Width = 3 m • Aeration requirement is 0.3 m3/min/m • Sludge generation 40L/103 m3
****PROVIDE STEP BY STEP SOLUTION SOLVING H1 AND H2 VALUES in part B***** A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. a) Compute the permeability based on these test conditions and results. b) A falling head test is conducted on the same soil specimen at the same time (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values, provide step by step solution solving h1 and h2 values.
A constant head permeability test is performed on soil that is 4 cm2, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. What is the permeability based on these test conditions and results.
Q- If a soil has a voids ratio of 0.68 and water percolating through it has a discharge velocity of 1.35*10-2cm/s. Calculate its seepage velocity.
For a soil specimen, given the following: % passing sieve #4-92 %, sieve #10 -81%, sieve # 40-78%, LL-48%, PL-16%, GI-18.2 classify the soil by AASHTO classification system. GI = (F200-35)[0.2 + 0.005 (LL - 40)] +0.01 (F20015)(PI – 10)
PROBLEM NO. 2 A fined grained soil (no sand) is found to have a liquid limit of 70%, and a plastic limit of 38%. 70 CH 60 PIOLL- -line RZ0.73(L 20) CL U-e 10 OL 30 MH -CL- ML 10 ML OH or OL 10 16 20 30 40 $0 70 80 Liquid limit a. What is the plasticity index for this soil? b. On the plasticity chart for USCS, what soil type is 90 100 this? c. On the plasticity chart for the AASHTO Classification System, what soil type is this? Plasticitý index
A block of soil in a permeability test has a length of 120 mm and a cross-sectional area of 600 mm². The water level at one end is 200 mm above a fixed datum and at the other end is 40 mm above the same plane. The flow rate was 2.5 ml in 95 seconds. compute the coefficient of permeability of the soil in m/s.

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