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Question 12 Water is flowing downwards through a vertical sand column as shown in Figure 6....
Subject: Geotechnical Engineering (soil mechanics). Q3. A sand sample of 35 cm2 cross sectional area and...
Subject: Geotechnical Engineering (soil mechanics).
Q3. A sand sample of 35 cm2 cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 ml in 6 min. The dry weight of sand used for the test was 1120 gm, and Gs = 2.68. Determine (a) the hydraulic conductivity in cm/sec, (b) the discharge velocity, and (c) the seepage velocity.
Problem 3: A constant-head permeability test was performed on the soil sample shown below. The hydraulic...
Problem 3: A constant-head permeability test was performed on the soil sample shown below. The hydraulic conductivities were 0.04 cm/s for the sand and 0.0004 cm/s for the silt. The cross-sectional area of the sample is 10 cm², of which 9 cm' is sand and the remainder is silt. (a) Plot how the total hydraulic head (expressed in terms of AH) and hydraulic gradient vary along the length of the sample. (b) What would be the hydraulic conductivity (k) for...
1. A soil column has a sample of medium-grained sand 15-cm in height and 25 cm2is...
1. A soil column has a sample of medium-grained sand 15-cm in height and 25 cm2is cross-section area. With a head of 5.0 cm, a total of 100 ml of water is collected in 12 min. Find the hydraulic conductivity and flux
For Following Multiple Choice All Correct Answers Which Applied To Each Question. 1. The hydraulic head,...
For Following Multiple Choice All Correct Answers Which Applied To Each Question. 1. The hydraulic head, h, is equal to the sum of the: pressure, elevation, and velocity heads. fluid pressure and the elevation head. pressure head and elevation head. hydraulic conductivity and intrinsic permeability. 2. Henry Darcy (1865) measured the flow of water through sand-filled columns, and found that the total discharge, Q, through the column was: proportional to the column cross-sectional area, A. inversely proportional to the length,...
JE . For steady-state seepage shown in the Figure to the right, water levels are maintained...
JE . For steady-state seepage shown in the Figure to the right, water levels are maintained at the levels shown and water flows through the soil (shown in gray) from B to A. The cross-sectional area of the soil sample per- pendicular to flow is 2800 mm and soil permeability k is 0.05 cm/s. overflow 300 mm discharge a) What is the pressure head at point A? 280 mm 600 mm 600 mm b) What is the hydraulic gradient i...
6. (Bonus question) In the experimental setup shown in Figure 6, water flows through soils 1...
6. (Bonus question) In the experimental setup shown in Figure 6, water flows through soils 1 and 2 upward under constant head. Assume c-c as the datum. (1) Find the total and pressure heads at c-c; (2) If the head loss after flowing through Soil 2 is 30% of the total head difference, determine the total and pressure heads at b-b; (3) Given the coefficient of permeability of Soil 2 as 0.05 cm/sec, determine the rate of discharge; (4) Calculate...
Subject: Geotechnical Engineering (soil mechanics).
Q3. A sand sample of 35 cm2 cross sectional area and 20 cm long was tested in a constant head permeameter. Under a head of 60 cm, the discharge was 120 ml in 6 min. The dry weight of sand used for the test was 1120 gm, and Gs = 2.68. Determine (a) the hydraulic conductivity in cm/sec, (b) the discharge velocity, and (c) the seepage velocity.
Problem 3: A constant-head permeability test was performed on the soil sample shown below. The hydraulic conductivities were 0.04 cm/s for the sand and 0.0004 cm/s for the silt. The cross-sectional area of the sample is 10 cm², of which 9 cm' is sand and the remainder is silt. (a) Plot how the total hydraulic head (expressed in terms of AH) and hydraulic gradient vary along the length of the sample. (b) What would be the hydraulic conductivity (k) for...
JE . For steady-state seepage shown in the Figure to the right, water levels are maintained at the levels shown and water flows through the soil (shown in gray) from B to A. The cross-sectional area of the soil sample per- pendicular to flow is 2800 mm and soil permeability k is 0.05 cm/s. overflow 300 mm discharge a) What is the pressure head at point A? 280 mm 600 mm 600 mm b) What is the hydraulic gradient i...
6. (Bonus question) In the experimental setup shown in Figure 6, water flows through soils 1 and 2 upward under constant head. Assume c-c as the datum. (1) Find the total and pressure heads at c-c; (2) If the head loss after flowing through Soil 2 is 30% of the total head difference, determine the total and pressure heads at b-b; (3) Given the coefficient of permeability of Soil 2 as 0.05 cm/sec, determine the rate of discharge; (4) Calculate...
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