The given figure below illustrates upward flow of water through a silty soil sample. The sample is of cylindrical shape and, respectively, has a height and base area of 12 m and 50 cm2. Based on the provided information on the figure, what is the effective stress at point A located in the middle of the sample (in kN/m2)? (Note: When required, assume the unit weight of water equal to 10 kN/m3)
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The given figure below illustrates upward flow
of water through a silty soil sample. The sample...
The bed of a lake consists of a deposit of silty sand with a wet unit weight of 19 (kN/m3) and a ...
The bed of a lake consists of a deposit of silty sand with a wet unit weight of 19 (kN/m3) and a coefficient of permeability of 103 (m/sec). The depth of water in the lake is 6 m. It is known that water is seeping vertically upwards through the silty sand from an underlying aquifer. a) At what rate, in per square meter of the lake bed, must water flow upwards to cause a quick condition in the silty sand?...
Question 4 A sample of soft silty clay from the Thames Estuary is taken from the...
Question 4 A sample of soft silty clay from the Thames Estuary is taken from the ground, trimmed to a cylindrical specimen and then placed into a triaxial cell. The sample is compressed isotropically under drained conditions by increasing the cell pressure in the triaxial cell to 450 kN/m², with a back (pore) pressure of 200 kN/m2. At the end of the compression stage the sample is calculated to have dimensions of length = 74.03 mm and diameter = 37.17...
b was condxcied in the leb on aga-gray silty sand and e A taling head permeabity...
b was condxcied in the leb on aga-gray silty sand and e A taling head permeabity best a-6 25 cm tollowing dala were onained 4-1073 m 1 10 2 cm deita t- 90s tfor head to ral trom to r- 20°c The coeicient of C A 0.044 cm Determine the vertical effective stress at point "A"in Figure 4(drawn to scale). For the permeable soil layer,e-0524, 264, 5-100%, w-20s, dry unit weight . 15.83 kNm ? 25.79 kem2 B. C 65.42...
FIGURE P8.11 8.12 Figure P.8.12 shows an embankment load on a layer. Determine the stress increase...
FIGURE P8.11 8.12 Figure P.8.12 shows an embankment load on a layer. Determine the stress increase at points A. B. which are located at a depth of 5 m below the groun K 6 mo Center line load on a silty clay soil oints A, B, and C, below the ground surface. 1V:2H 17:2H 10 m y =17 kN/m3 5 m c ------ FIGURE P8.12.
For the soil strata, draw diagrams indicating the total stress, pore pressure and effective stress profiles...
For the soil strata, draw diagrams indicating the total stress, pore pressure and effective stress profiles to the bottom of clay layer. Fine sand has a thickness of 6 m (FST) with saturated unit weight of 18 kN/m2. Clay has a thickness of 8 m with saturated unit weight of 14 kN/m3 The water table is located at depth of 0.7 of fine sand thickness below the ground surface (i.e. depth=0.7*FST). Fine sand will sustain capillarity (suction). Assume the same...
Q3 (35) A soil profile is shown in figure below. Calculate total stess, pore water pressure...
Q3 (35) A soil profile is shown in figure below. Calculate total stess, pore water pressure and effective stres at B, C, and D. Take unit weight of water 10 kN/m. Water level rise up 1.6om from the inital level. Caloulate change in effective stress at points D. 1.8 m and G 16.3 16 m Clay 29
Two undisturbed clay samples were taken from the middle of the overconsolidated and normally consolidated clay layers in the soil profile shown. The water table is at the top of the overconsolidated c...
Two undisturbed clay samples were taken from the middle of the
overconsolidated and normally consolidated clay layers in the soil
profile shown. The water table is at the top of the
overconsolidated clay layer. Consolidation tests were carried out
on the two samples and the results are summarized in the table
below. Assume that the bulk, dry, and saturated unit weights of the
sand are 16 kN/m3, 16 kN/m3 and 19
kN/m3, respectively. The specific gravity of the clay
soil...
A constant-head permeameter has a diameter of 2.5 cm. A 5.0 cm soil sample with the...
A constant-head permeameter has a diameter of 2.5 cm. A 5.0 cm soil sample with the same cross-sectional area is place in the permeameter. When a head difference of 5 cm is applied between the inlet and outlet ports, the permeameter discharges 50 cm3 of water in 90 s. (a) Calculate the hydraulic conductivity of the soil in m/s and in ft/day. (b) What is the intrinsic permeability of the soil at 20 ◦C? (c) What would be the soil’s...
2. A cylindrical sample of soil is confined in a rigid-wall permeameter and measures 10 cm...
2. A cylindrical sample of soil is confined in a rigid-wall permeameter and measures 10 cm in diameter and 20 cm in length. The axis of the cylindrical sample lies in a horizontal plane. They hydraulic head at the left end of the specimen is controlled by a reservoir; the water surface in the reservoir is exactly 100 cm above the horizontal axis of the cylindrical soil sample and remains at 100 cm through a system that automatically adds water...
The soil conditions adjacent to a sheet pile wall are given in the Figure 2 below,...
The soil conditions adjacent to a sheet pile wall are given in the Figure 2 below, a surcharge pressure of 40 kN/m2 being carried on the surface behind the wall. Draw the active and passive lateral earth pressure diagrams; and determine the active and passive forces acting on 1m length of the wall. The properties of the clay layer: Cohesion: c 10 kN/m2 Shear resistance angle: #25° Unit weight: y-19.5 kN/m3 9-40 kN/m Clay Clay Figure 3 The following may...
The bed of a lake consists of a deposit of silty sand with a wet unit weight of 19 (kN/m3) and a coefficient of permeability of 103 (m/sec). The depth of water in the lake is 6 m. It is known that water is seeping vertically upwards through the silty sand from an underlying aquifer. a) At what rate, in per square meter of the lake bed, must water flow upwards to cause a quick condition in the silty sand?...
Question 4 A sample of soft silty clay from the Thames Estuary is taken from the ground, trimmed to a cylindrical specimen and then placed into a triaxial cell. The sample is compressed isotropically under drained conditions by increasing the cell pressure in the triaxial cell to 450 kN/m², with a back (pore) pressure of 200 kN/m2. At the end of the compression stage the sample is calculated to have dimensions of length = 74.03 mm and diameter = 37.17...
b was condxcied in the leb on aga-gray silty sand and e A taling head permeabity best a-6 25 cm tollowing dala were onained 4-1073 m 1 10 2 cm deita t- 90s tfor head to ral trom to r- 20°c The coeicient of C A 0.044 cm Determine the vertical effective stress at point "A"in Figure 4(drawn to scale). For the permeable soil layer,e-0524, 264, 5-100%, w-20s, dry unit weight . 15.83 kNm ? 25.79 kem2 B. C 65.42...
FIGURE P8.11 8.12 Figure P.8.12 shows an embankment load on a layer. Determine the stress increase at points A. B. which are located at a depth of 5 m below the groun K 6 mo Center line load on a silty clay soil oints A, B, and C, below the ground surface. 1V:2H 17:2H 10 m y =17 kN/m3 5 m c ------ FIGURE P8.12.
For the soil strata, draw diagrams indicating the total stress, pore pressure and effective stress profiles to the bottom of clay layer. Fine sand has a thickness of 6 m (FST) with saturated unit weight of 18 kN/m2. Clay has a thickness of 8 m with saturated unit weight of 14 kN/m3 The water table is located at depth of 0.7 of fine sand thickness below the ground surface (i.e. depth=0.7*FST). Fine sand will sustain capillarity (suction). Assume the same...
Q3 (35) A soil profile is shown in figure below. Calculate total stess, pore water pressure and effective stres at B, C, and D. Take unit weight of water 10 kN/m. Water level rise up 1.6om from the inital level. Caloulate change in effective stress at points D. 1.8 m and G 16.3 16 m Clay 29
Two undisturbed clay samples were taken from the middle of the
overconsolidated and normally consolidated clay layers in the soil
profile shown. The water table is at the top of the
overconsolidated clay layer. Consolidation tests were carried out
on the two samples and the results are summarized in the table
below. Assume that the bulk, dry, and saturated unit weights of the
sand are 16 kN/m3, 16 kN/m3 and 19
kN/m3, respectively. The specific gravity of the clay
soil...
The soil conditions adjacent to a sheet pile wall are given in the Figure 2 below, a surcharge pressure of 40 kN/m2 being carried on the surface behind the wall. Draw the active and passive lateral earth pressure diagrams; and determine the active and passive forces acting on 1m length of the wall. The properties of the clay layer: Cohesion: c 10 kN/m2 Shear resistance angle: #25° Unit weight: y-19.5 kN/m3 9-40 kN/m Clay Clay Figure 3 The following may...
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