a. Calculate the effective pressure at point C. b. Find the seepage force per unit volume in kN/m³. c. If a piezometer is placed at point B, to what height the water will rise above this point?
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- The hgure shows a granular soil in a tank having a downward seepage. The water level in the tank is held constant by adjusting the supply from the top and the outflow at the bottom. The void ratio of the soil is 0.50 and the specific gravity is 2.7. H,0 0.8 m 1.1 m A 3.6 m 5.4 m B C If a plczometer is placed at point B, to what height the water will rise above this point?In the setup below, the soil's hydraulic conductivity is in m/s and it's void ratio is 1. Determine the hydraulic conductivity, the elevation head and pressure head at point A, and the discharge velocity through the soil sample.The rate of upward seepage taking place through a granular soil contained in a tank is 976.5 cm3/sec. Given that H1 = h = 1.8 m, the area of the tank = 0.62 m?, void ratio of the soil = 0.55, the specific gravity is 2.65, and the hydraulic conductivity of the sand is 0.21 cm/sec, determine the following: a. The hydraulic gradient. b. Length of H2. c. The critical hydraulic gradient of the soil sample. d. If boiling will occur at h = 2.5 m? Justify your answer by showing the appropriate comparison by solving. e. The value ofh to cause boiling. (あ)。 H, H1 H2 Valve (open) Inflow
- A soil sample is placed in a 1m long and 10cm diameter tube. A constant supply of water is allowed to flow from inlet to outlet. The total water head at the inlet is 2m and the total water head at the outlet is 1m. The hydraulic conductivity is 0.001 cm/s. Which of the following answer is correct? O a. The flow velocity is 0.001 cm/s Ob. The flow velocity is 25 cm/s c. The hydraulic gradient in the tube is 2 Od. The hydraulic gradient in the tube is 0.001The rate of upward seepage taking place through a granular soil contained in a tank is 976.5 cm³/sec. Given that H1 = h = 1.8 m, the area of the tank = 0.62 m², void ratio of the soil = 0.55, the specific gravity is 2.65, and the hydraulic conductivity of the sand is 0.21 cm/sec, determine the following: a. The hydraulic gradient. b. Length of H2. c. The critical hydraulic gradient of the soil sample. d. If boiling will occur at h = 2.5 m? Justify your answer by showing the appropriate comparison by solving. e. The value ofh to cause boiling. (は) A H2 Valve (open) Inflow1. (30 pts) The soil profile shown below consists of 10 meters of sandy silt overlying gravel. The pore water pressure at the top surface of the silty sand is zero and can be assumed to remain zero. a) Calculate the level to which water would rise in a piezometer tube inserted into the top of the gravel if the silty sand is just stable? Use submerged unit weights and seepage forces to arrive at your answer (do not calculate total stresses and pore water pressures). Express your answer as an elevation, e.g. "Elev. 130". (Note: Elevations are in meters) (10 pts) b) Using the piezometric elevation calculated in part (a), calculate the pore water pressure at the bottom of the silty sand if the silty sand is just stable (10 pts). c) Calculate the total stress at the base of the silty sand and show that it is equal to the pore water pressure calculated in part (b) (10 pts) Elev. 120 m. Elev. 110 m. Sandy Silt (saturated) Void ratio, e = 0.68 G = 2.65 Gravel
- CVE 331: Theoretical hydraulic conductivity calculation Problem 1: The hydraulic conductivity of a sandy sol is 7x10 cm/sec at void ratio 0.68. What is the hydraulic conductivity at void ratio 0.85 ? (o.re) A= 2,42e k2 ei Problem 2: The hydraulic conductivity of a clay soil is 121o* cm/sec at void ratio 0.56, and 3.1x10 cm/sec at void ratio 0.74. What is the hydraulic conductivity the soll at void ratio 0.65 ? e3 ki %3D - 3. 797 GRAIN SIZE DISTRIBUTION GRAPH. A- PROJECEFrom the figure shown, the void ratio of the sand is 0.55 with a specific gravity of 2.68. The cross-sectional area of the tank is 0.5 sq.m and hydraulic conductivity of sand = 0.1 cm/s. a. What is the rate of upward seepage in cu.m/hour? b.Determine the critical hydraulic gradient for zero effective stress. c. Determine the value of h (head loss) to cause boiling. NEED ASAP. THANK YOU.The figure shows a granular soil in a tank having a downward seepage. The water level in the tank is held constant by adjusting the supply from the top and the outflow at the bottom. The void ratio of the soil is 0.50 and the specific gravity is 2.7. H,0 0.8 m 1.1 m A 3.6 m 5.4 m B C Il a plezometer is placed at point B, to what height the water will rise above this point?
- A falling head hydraulic conductivity test is performed on a sample of soil. The stand pipe having a diameter of 0.20cm is observed and it takes 60 seconds for the water to drop by 50 cm from an initial hydraulic head of 90cm. The sample has a length of 20cm, and a diameter of 4cm. a.Find the coefficient of permeability (cm/sec) b.Solve for the hydraulic gradient c. Compute the rate of flow of water in the soil. (cm' /sec.) 0.20 cm 6 s TAND PIPE 50cm Acm 不 20am -: SOILa. For each of the cases, I, II and III, determine the pressure elevation and total heads at points A, B and C. Use the given datum in each case. b. If the coefficient of permeability of the soil in each case is 2 cm/sec, and the cross sectional area is 10 cm2 calculate the water flow rate through the soil. Assume head loss is only through the soil sample.Q4 A 0.7m long soil specimen is subject to a steady-state flow, as shown in Figure Q4. The saturated unit weight of the soil is 20 kN/m³. Determine the following: Water 0.3 m 0.8 m А 0.3 m Datum 0.4 m Y Figure Q4 a) Total head (m) at point A, B and C. b) Elevation head (m) at point A, B and C. c) Porewater pressure head (m) at point A, B and C.