Estimate the settlement of the center of the tank, shown in the sketch, due to consolidation of the 20-ft layer of clay.
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- A course sand sample is placed in the constant permeameter test. Water passes through the sample water with a constant head of 40cm and after 0.00167hr, 40grams of water have been collected. What is the coefficient of permeability of the sand in cm/sec if the sample is placed inside a 166cm container with a 7.89cm radius?Given data: Depth of Clay layer= 5 Depth of Sand layer= 5 Saturated unit weight of clay kN/m3 = 17 Saturated unit weight of sand kN/m3 = 18 Height of Embankment= 4 Unit weight of Embankment kN/m3= 17A Shelby tube has outside diameter of 3.0 in. and wall thicknessof 0.065 in. What is the area ratio of the tube?
- For a soil, given e= 0.75, w= 22%, Gs= 2.66, calculate the dry density of soil in slug/ft3. Note p of water= 1.94 slug/ft3 a. 2.85 b. 3.6 c. 2.95 d. 3.84. Look at the profile in page 53 of your reader. Calculate the hydrostatic pore pressure at the interface between the clay layer and the sand layer. 5. Use Excel to create a plot of hydrostatic pore pressure in kPa (x-axis) vs. depth in meters (y-axis) for the profile associated with problem 4 (above). We shall assume that the soil above the water table is dry, so clearly, the porewater pressure at z 6.5m is zero. Graph: line only (no markers); y-axis in reverse order, starting with z = 0 and ending with z = 14m (top of the bedrock). Label both axes and add tick marks to them. Remember: use an “x-y scatter” graph typeFor a soil, given e= 0.75, w= 22%, Gs= 2.66, calculate the moist unit weight of soil in KN/m3. a.18.91 b.14.91 c.78.03 d.94.85
- A course sand sample is placed in the constant permeameter test. Water passes through the sample water with a constant head of 40cm and after 0.00167hr, 40grams of water have been collected. What is the coefficient of permeability of the sand in cm/sec if the sample is placed inside a 166cm container with a 7cm by 5cm dimension.For a soil, given e= 0.75, w= 22%, Gs= 2.66, calculate the degree of saturation. a.14.91 b.78.03 c.18.91 d.94.85Subject: Soil Mechanics Please provide a solution and diagram A compressible stratum is 6 m thick and its void ratio is 1.70. If the final void ratio after the construction of a building is expected to be 1.61, what will be the probable ultimate settlement of the building in cm? a. 345.5 b. 63.75 c. 20 d. 12.68
- Soil borings made at a site indicate that the top 8 m is a loose sand, with the groundwater table at 4 m below the ground surface. Below this is a fairly soft blue-gray silty clay with an average water content of 30%. The boring was terminated at 20 m below the ground surface when fairly stiff silty clay was encountered. For the upper sand gammadry = 14.0 kN/m3 and gammasat = 15.0 kN/m3 , where gamma is the unit weight. For the clay, ps = 2.70 Mg/m3 where p is density. (1) Calculate the total stress, pore water pressure, and effective stress at 0 (the surface), 4, 8, 14, 16, and 20 m below the ground surface. (2) Plot the soil profile and the variation of total stress, pore water pressure, and effective stress with depth.A sample of soil having a mass of 360 g is to be placed into a cylinder whose volume is 750 cm³. An additional volume of 573 cm³ of water is required to fill the container with moisture content = 22.5% and GS = 2.60. 1. Compute the bulk unit weight. a. 6.16 kN/m³ b. 16.25 kN/m³ c. 18.19 kN/m³ d. 19.95 kN/m³ 2. Compute the submerged unit weight. a. 8.17 kN/m³ b. 9.42 kN/m³ c. 10.02 kN/m³ d. 12.18 kN/m³ 3. Compute the porosity. a. 0.56 b. 0.46 c. 0.36 d. 0.26An oil tank is to be sited on a soft alluvial deposit of clay. Below the soft clay is athick layer of stiff clay. It was decided that a circular embankment, 10 m diameter,with wick drains inserted into the soft clay would be constructed to preconsolidateit. The height of the embankment is 6 m and the unit weight of the soil comprisingthe embankment is 18 kN/m3. The following data are available: thickness of softclay = 7 m, ks = 1 × 10−10 m/s and Ch = 0.6 m2/yr. The desired degree ofconsolidation is 90% in 12 months. Determine the spacing of a square grid of thewick drains. Assume wick drain of size 100 mm × 3 mm and qw = 0.1 × 10−6 m3/s.The flow point distance is 4 m. Assume a half-closed system.