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A clay layer is sandwiched between two dra oefficient of consolidation of 35 ft/year, determine the...
In the figure below, the natural soil profile consists of sand overlying clay overlying sand overlying bedrock. A water...
In the figure below, the natural soil profile consists of sand
overlying clay overlying sand overlying bedrock. A
water table is present 1 m beneath the surface of the natural
ground. If 4 m of consistent fill material (γfill = 15
kN/m3) was placed on top of this soil profile that covered a
large area, determine:
(a) The consolidation settlement of the clay layer (using 4
equal layers in your calculation), and
(b) The time (in days) for this consolidation...
The singly-drained clay layer has a coefficient of consolidation of 20 ft2 lyr. The layer is...
The singly-drained clay layer has a coefficient of consolidation of 20 ft2 lyr. The layer is subjected to a uniform vertical stress increase of 100 kPa. Determine the value of the excess pore pressure at point A 2 years after the application of the load. Also given is the chart giving the local degree of consolidation. Sand 15' A 26 Clay bedrock (impermeable) 0 0.06 Clay bedrock (impermeable) 0 11 -0.05 ماده E0.848 E0.90 1 13 2 0 0.1 0.2...
9. (10 points) A consolidation test performed on a sample from -depth of the clay layer...
9. (10 points) A consolidation test performed on a sample from -depth of the clay layer results the following: initial void ratio = 0.6-e coefficient of re-compression = 0.025-Cr coefficient of compression 0.224 C preconsolidation stress 3000 psf. coefficient of consolidation = 0.065 ft2/day a) Calculate the primary consolidation setlement of the clay layer due to the proposed fill. b) Find the time it takes to complete 90% of the estimated primary consolidation settlement. a) Proposed fill y 120 lbt...
Question 4 (20 marks): A 2-m thick normally-consolidated clay soil is resting on impermeable shale rock;...
Question 4 (20 marks): A 2-m thick normally-consolidated clay soil is resting on impermeable shale rock; a 20-m thick layer of sandy soil is placed on top of the clay to expedite consolidation process. The unit weight of the sand is 15 kN/m3 and the unit weight of the clay is 10 kN/m3. For the clay layer, the initial void ratio is 2.0, the compression index of the clay is Ce 0.40, the recompression index is C, - 0.10, and...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 1...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 150 sec. How long (in days) will it take for a 3 m thick layer of the same clay in the field under the same pressure increment to reach 75% consolidation? There is an impermeable shale layer at the bottom of the clay layer in the field I. 2. Use Figure 1 for the following Compute the vertical effective...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means that a very pervious layer compared to the clay exists on top of and under the clay layer) The embankment applied an average vertical stress increase of 100 kPa to the clay layer. The water table is located at the mid depth of the sand layer. Assume the sand above the water table is dry 0 Pore water pressure, u (kPa) 20 40 60...
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...
geotechnical engineering The soil profile at a site consists of a clay layer 10 m thick,...
geotechnical engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m² and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m' and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m² and extend to the depth investigated at the site. The...
QO vreme (b/n) (6) 3. A 40 ft layer of silty clay is overlain by 5ft...
QO vreme (b/n) (6) 3. A 40 ft layer of silty clay is overlain by 5ft of 1000 2000 3000 4000 sand. The base of the clay layer lies over an impervious siltstone bedrock. Water table is at ground surface and is hydrostatic in the clay layer. The initial vertical effective stress do'and maximum past pressure profiles with depth are plotted in the Figure to the right. Initial void ratio e, -0.95. One- dimensional consolidation test results yielded the following:...
The ground profile of a construction site consists of a 3 m thick layer of sand...
The ground profile of a construction site consists of a 3 m thick layer of sand followed by a 2 m thick layer of clay lying on impervious bedrock. The watertable is at a depth of 2 m below the ground surface. The sand has a dry unit weight of 16 kN/m and a saturated unit weight of 18 kN/m3. The capillary rise in sand is 0.5 m. The clay has a bulk unit weight of 19 kN/m 1. One...
In the figure below, the natural soil profile consists of sand
overlying clay overlying sand overlying bedrock. A
water table is present 1 m beneath the surface of the natural
ground. If 4 m of consistent fill material (γfill = 15
kN/m3) was placed on top of this soil profile that covered a
large area, determine:
(a) The consolidation settlement of the clay layer (using 4
equal layers in your calculation), and
(b) The time (in days) for this consolidation...
The singly-drained clay layer has a coefficient of consolidation of 20 ft2 lyr. The layer is subjected to a uniform vertical stress increase of 100 kPa. Determine the value of the excess pore pressure at point A 2 years after the application of the load. Also given is the chart giving the local degree of consolidation. Sand 15' A 26 Clay bedrock (impermeable) 0 0.06 Clay bedrock (impermeable) 0 11 -0.05 ماده E0.848 E0.90 1 13 2 0 0.1 0.2...
9. (10 points) A consolidation test performed on a sample from -depth of the clay layer results the following: initial void ratio = 0.6-e coefficient of re-compression = 0.025-Cr coefficient of compression 0.224 C preconsolidation stress 3000 psf. coefficient of consolidation = 0.065 ft2/day a) Calculate the primary consolidation setlement of the clay layer due to the proposed fill. b) Find the time it takes to complete 90% of the estimated primary consolidation settlement. a) Proposed fill y 120 lbt...
Question 4 (20 marks): A 2-m thick normally-consolidated clay soil is resting on impermeable shale rock; a 20-m thick layer of sandy soil is placed on top of the clay to expedite consolidation process. The unit weight of the sand is 15 kN/m3 and the unit weight of the clay is 10 kN/m3. For the clay layer, the initial void ratio is 2.0, the compression index of the clay is Ce 0.40, the recompression index is C, - 0.10, and...
The time for 50% consolidation of a 25 mm thick clay specimen (drained at top and bottom) in the laboratory is 150 sec. How long (in days) will it take for a 3 m thick layer of the same clay in the field under the same pressure increment to reach 75% consolidation? There is an impermeable shale layer at the bottom of the clay layer in the field I. 2. Use Figure 1 for the following Compute the vertical effective...
1. An 8-m thick normally consolidated clay layer is doubly drained as shown below. (This means that a very pervious layer compared to the clay exists on top of and under the clay layer) The embankment applied an average vertical stress increase of 100 kPa to the clay layer. The water table is located at the mid depth of the sand layer. Assume the sand above the water table is dry 0 Pore water pressure, u (kPa) 20 40 60...
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...
geotechnical engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m² and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m' and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m² and extend to the depth investigated at the site. The...
QO vreme (b/n) (6) 3. A 40 ft layer of silty clay is overlain by 5ft of 1000 2000 3000 4000 sand. The base of the clay layer lies over an impervious siltstone bedrock. Water table is at ground surface and is hydrostatic in the clay layer. The initial vertical effective stress do'and maximum past pressure profiles with depth are plotted in the Figure to the right. Initial void ratio e, -0.95. One- dimensional consolidation test results yielded the following:...
The ground profile of a construction site consists of a 3 m thick layer of sand followed by a 2 m thick layer of clay lying on impervious bedrock. The watertable is at a depth of 2 m below the ground surface. The sand has a dry unit weight of 16 kN/m and a saturated unit weight of 18 kN/m3. The capillary rise in sand is 0.5 m. The clay has a bulk unit weight of 19 kN/m 1. One...
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