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(5 points) 6. A soil profile consists of 4 ft of organic soil (a 75 pe)...
The soil profile consists of 15 feet of sand (=105 pcf) over 10 feet of organic...
The soil profile consists of 15 feet of sand (=105
pcf) over 10 feet of organic silt (=100
pcf) over a highly plastic intact shale.
The water table is located at 10 feet underneath the ground
surface.
A highway embankment is expected to apply a pressure of 1000 psf
to the surface of the soil profile.
Compute the settlement resulting from consolidation of the
organic silt after 30 years.
3. Shear Strength a. Plot the effective stress Mohr-Coulomb failure envelope for a soil with c'-500...
3. Shear Strength a. Plot the effective stress Mohr-Coulomb failure envelope for a soil with c'-500 b. A plane through a sample of this soil has an effective normal stress of c. Use a Mohr circle that touches the failure enve psf and 32 deg. acting on it. What is the shear strength of the soil on that plane? of 2000 psf to estimate the values of σ, and σ, at a state of shear failure 2000 psf lope at...
6. (former exam question) A large granular free draining fill 6-ft thick was placed on a...
6. (former exam question) A large granular free draining fill 6-ft thick was placed on a 15-ft thick layer of clay as shown in the figure below. A piezometer was installed at the midpoint of the clay layer. The water table is at the original ground surface. Three years after the placement of the fill, the piezometer reads 7.63 ft above the ground water level. Answer the following questions: a. What percentage of the total consolidation for the entire clay...
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...
Problem 1 (6 Points) Refer to the soil profile in Fig. 1. Plot separate diagrams for...
Problem 1 (6 Points) Refer to the soil profile in Fig. 1. Plot separate diagrams for total stress (ov), water pressure (us) and effective stress (o'v) Ground Surface Ymoist-110 pcf Silty Sand 10 ft watery Fig. 1 y=112.4 pcf Clay 20 ft
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...
Show all work 20-ft thick fill is planned to be placed at a construction site. Ground settlement is of concern due...
Show all work
20-ft thick fill is planned to be placed at a construction site. Ground settlement is of concern due to high compressibility of the clay layer. A consolidation test was performed on a sample collected from the center of the 15-ft thick clay layer. On the following page, e-logp curve obtained from the test is included. Estimate ground settlement based on the information provided. Hint: Don't forget to correct the curve for field conditions. Ifơ0 is within 10%...
2) You are given the soil deposit shown below. Assume c,-0.1 ftiday and c0.1 ftday. You...
2) You are given the soil deposit shown below. Assume c,-0.1 ftiday and c0.1 ftday. You have previously calculated that the total ultimate settlement of the clay layer will be 131 ft and it will take 1,908 days to achieve an average degrec of consolidation of 90%. Consider these two options for OPTION : SURCHARGE If you want to accelerate settiement such that an average degree of consolidation of 90% would be achieved in 2 years, how much surcharge would...
[Problems 1-4] The soil profile at a site for a proposed office building consists of a...
[Problems 1-4] The soil profile at a site for a proposed office building consists of a layer of fine sand 10.4 m thick above a layer of soft, normally consolidated clay 2 m thick. Below the soft clay is a deposit of coarse sand. The groundwater table was observed at 3 m below ground level. The void ratio of the sand is 0.76, and the water content of the clay is 43%. The building will impose a vertical stress increase...
1. (25 points) The soil profile at a site consists of a layer of fine sand...
1. (25 points) The soil profile at a site consists of a layer of fine sand 5 m thick above a layer of clay 4 m thick. Below the clay is a layer of impermeable rock. The groundwater table was observed at 2 m below ground level. The unit weight of the sand above and below the water table is 20 KN/m'. The water content of the clay is 25% and its dry unit weight is 15 KN/m'. The compression...
The soil profile consists of 15 feet of sand (=105
pcf) over 10 feet of organic silt (=100
pcf) over a highly plastic intact shale.
The water table is located at 10 feet underneath the ground
surface.
A highway embankment is expected to apply a pressure of 1000 psf
to the surface of the soil profile.
Compute the settlement resulting from consolidation of the
organic silt after 30 years.
3. Shear Strength a. Plot the effective stress Mohr-Coulomb failure envelope for a soil with c'-500 b. A plane through a sample of this soil has an effective normal stress of c. Use a Mohr circle that touches the failure enve psf and 32 deg. acting on it. What is the shear strength of the soil on that plane? of 2000 psf to estimate the values of σ, and σ, at a state of shear failure 2000 psf lope at...
6. (former exam question) A large granular free draining fill 6-ft thick was placed on a 15-ft thick layer of clay as shown in the figure below. A piezometer was installed at the midpoint of the clay layer. The water table is at the original ground surface. Three years after the placement of the fill, the piezometer reads 7.63 ft above the ground water level. Answer the following questions: a. What percentage of the total consolidation for the entire clay...
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...
Problem 1 (6 Points) Refer to the soil profile in Fig. 1. Plot separate diagrams for total stress (ov), water pressure (us) and effective stress (o'v) Ground Surface Ymoist-110 pcf Silty Sand 10 ft watery Fig. 1 y=112.4 pcf Clay 20 ft
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...
Show all work
20-ft thick fill is planned to be placed at a construction site. Ground settlement is of concern due to high compressibility of the clay layer. A consolidation test was performed on a sample collected from the center of the 15-ft thick clay layer. On the following page, e-logp curve obtained from the test is included. Estimate ground settlement based on the information provided. Hint: Don't forget to correct the curve for field conditions. Ifơ0 is within 10%...
2) You are given the soil deposit shown below. Assume c,-0.1 ftiday and c0.1 ftday. You have previously calculated that the total ultimate settlement of the clay layer will be 131 ft and it will take 1,908 days to achieve an average degrec of consolidation of 90%. Consider these two options for OPTION : SURCHARGE If you want to accelerate settiement such that an average degree of consolidation of 90% would be achieved in 2 years, how much surcharge would...
[Problems 1-4] The soil profile at a site for a proposed office building consists of a layer of fine sand 10.4 m thick above a layer of soft, normally consolidated clay 2 m thick. Below the soft clay is a deposit of coarse sand. The groundwater table was observed at 3 m below ground level. The void ratio of the sand is 0.76, and the water content of the clay is 43%. The building will impose a vertical stress increase...
1. (25 points) The soil profile at a site consists of a layer of fine sand 5 m thick above a layer of clay 4 m thick. Below the clay is a layer of impermeable rock. The groundwater table was observed at 2 m below ground level. The unit weight of the sand above and below the water table is 20 KN/m'. The water content of the clay is 25% and its dry unit weight is 15 KN/m'. The compression...
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