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2. An embankment is built as part of a highway construction as shown in the following...
You are working on a construction site for GDOT, where an embankment will be built on...
You are working on a construction site for GDOT, where an
embankment will be built on a deposit of soft clay that is 4 ft
thick. The clay is drained only at the top of the deposit.
(2a) If the proposed embankment is 30 ft tall and has a bulk
unit weight γ = 108 pcf, then determine the initial increase in
pore water pressure caused by the construction of the
embankment.
(2b) Calculate the time for the clay to...
The construction of a new embankment induces a uniform load of 18kN/m^2 on the top of...
The construction of a new embankment induces a uniform load of 18kN/m^2 on the top of a 12 meter thick layer of saturated clay, whose characteristics are as follows: bulk unit weight γ=16kN/m^3 intial void ratio is 1.8 compression index Cc= 0.7 the water table is at the initial ground level top of the clay laye. Assuming the clay is normally consolidated. a) Estimate the settlement of the clay layer after the realization of the embankment. b) Compare results obtained...
Question 5 (Effective Stress & Consolidation) Figure 05 shows the soil profile of a construction site....
Question 5 (Effective Stress & Consolidation) Figure 05 shows the soil profile of a construction site. The water table is at the ground surface. Saturated unit weight of the sand is 18.8kN/m' and that of the clay is 19.6kN/m. Assume permeability of the clay is very low and unit weight of water is 10kN/m'. Water Table Sand 5m Clay 6m Figure 05 a) Determine the vertical total stress, pore water pressure, and vertical effective stress at the mid-height of the...
Could someone please help with this problem parts a-f 2. Use Figure 1 and Table 1...
Could someone
please help with this problem parts a-f
2. Use Figure 1 and Table 1 for the following a) Compute the vertical effective stress (o) in kN/m2 at the center of the clay layer prior to the construction of the footing. [Note: To compute c., you will first have to use the weight-volume relationships to compute the unit weight of the clay.] b) Assuming B 15 m, L 2.5 m, and Q-120 kN, use the Boussinesq procedure to determine...
g=9.81m/s^2 When it say "preconsolidated under vertical effective stress of 130 kPa", this means that the...
g=9.81m/s^2
When it say "preconsolidated under vertical effective stress of
130 kPa", this means that the preconsolidation pressure at the
centre of the clay layer is 130 kPa, NOT that 130 kPa was applied
as a surcharge at the surface.
In the following questions, you do not need to divide the clay layer into multiple layers to calculate the consolidation settlement. Asume the clay to be only one layer q 50 kN/m2 3.0 m dry WT Sand: Ysat 1k -17...
(a) Determine and draw the lateral pressure distribution (active hydrostatic) acting on the smooth wall shown...
(a) Determine and draw the lateral pressure distribution (active hydrostatic) acting on the smooth wall shown in Figure 2. The water table is at the interface of the soil layers. (8 marks) Soil 1: c'0 kPa, ' 32 y 16 kN/m 2 m 4 m Soil 2: c'-5 kPa, 30° Yet20 kN/m3 Figure 2 (b) In Figure 3 below, the L-shaped area carries a 200 kN/m2 uniform load. Determine the vertical stress increase due to the loading at a depth...
A 5m wide and 10m long rectangular foundation is built on a site where the soil...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Fiqure 8. The foundation carries a surcharge loading of q-65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
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...
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:...
solve Question 8. please show steps [Problems 7-8] A 12 m thick layer of Omaha clay...
solve Question 8. please show steps
[Problems 7-8] A 12 m thick layer of Omaha clay is double drained. (This means that a very pervious layer compared to the clay exists on top of and under the 12 m clay layer). The coefficient of consolidation is Cy = 8.0 x 10-8 m²/s. Problem 7. Estimate the degree of consolidation for the clay layer 5 years after loading at the depth of 6 m. (1) 32% (2) 46% (3) 61% (4)...
You are working on a construction site for GDOT, where an
embankment will be built on a deposit of soft clay that is 4 ft
thick. The clay is drained only at the top of the deposit.
(2a) If the proposed embankment is 30 ft tall and has a bulk
unit weight γ = 108 pcf, then determine the initial increase in
pore water pressure caused by the construction of the
embankment.
(2b) Calculate the time for the clay to...
Question 5 (Effective Stress & Consolidation) Figure 05 shows the soil profile of a construction site. The water table is at the ground surface. Saturated unit weight of the sand is 18.8kN/m' and that of the clay is 19.6kN/m. Assume permeability of the clay is very low and unit weight of water is 10kN/m'. Water Table Sand 5m Clay 6m Figure 05 a) Determine the vertical total stress, pore water pressure, and vertical effective stress at the mid-height of the...
Could someone
please help with this problem parts a-f
2. Use Figure 1 and Table 1 for the following a) Compute the vertical effective stress (o) in kN/m2 at the center of the clay layer prior to the construction of the footing. [Note: To compute c., you will first have to use the weight-volume relationships to compute the unit weight of the clay.] b) Assuming B 15 m, L 2.5 m, and Q-120 kN, use the Boussinesq procedure to determine...
g=9.81m/s^2
When it say "preconsolidated under vertical effective stress of
130 kPa", this means that the preconsolidation pressure at the
centre of the clay layer is 130 kPa, NOT that 130 kPa was applied
as a surcharge at the surface.
In the following questions, you do not need to divide the clay layer into multiple layers to calculate the consolidation settlement. Asume the clay to be only one layer q 50 kN/m2 3.0 m dry WT Sand: Ysat 1k -17...
(a) Determine and draw the lateral pressure distribution (active hydrostatic) acting on the smooth wall shown in Figure 2. The water table is at the interface of the soil layers. (8 marks) Soil 1: c'0 kPa, ' 32 y 16 kN/m 2 m 4 m Soil 2: c'-5 kPa, 30° Yet20 kN/m3 Figure 2 (b) In Figure 3 below, the L-shaped area carries a 200 kN/m2 uniform load. Determine the vertical stress increase due to the loading at a depth...
A 5m wide and 10m long rectangular foundation is built on a site where the soil profile consists of 3m of gravel and 4m of clay overlying rigid impermeable rock as shown in Fiqure 8. The foundation carries a surcharge loading of q-65 kN/m2 Initially the water table is 1 m below the surface of the gravel. The water table rises to the surface of the gravel slowly over a period of time and the surface loading induces an increase...
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...
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:...
solve Question 8. please show steps
[Problems 7-8] A 12 m thick layer of Omaha clay is double drained. (This means that a very pervious layer compared to the clay exists on top of and under the 12 m clay layer). The coefficient of consolidation is Cy = 8.0 x 10-8 m²/s. Problem 7. Estimate the degree of consolidation for the clay layer 5 years after loading at the depth of 6 m. (1) 32% (2) 46% (3) 61% (4)...
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