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3. A) Estimate the profiles of vertical effective stresses for the following problem from the ground...
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...
Question 3: Calculate the total stress, effective stress, and pore water pressure at points A and...
Question 3: Calculate the total stress, effective stress, and pore water pressure at points A and B for the soil profile shown in Figure 2.0 below. Assume specifie gravity value as 2.70, void ratio as 0.7, degree of saturation as 0.85, and water content as 28% Point Load = 500 kN 2.0m GWT 4.5m OA 5.0m .B Figure 2.0 Question 4: If the groundwater in the figure 2.0 were (a) to drop 2m below the surface, (b) to rise 2...
Detailed Solution Q1. A soil section is comprised of two layers with the following properties: soil...
Detailed Solution
Q1. A soil section is comprised of two layers with the following properties: soil 1 (0 to 3 m): Pary-1 7.65 kN/m2, %,-1961 kN/m2, soil 2 (3 to 8 m): %at-20.59 kN/m? The water table is 1.5 m below the ground surface. Plot the total vertical stress, pore pressure, and effective vertical stress over the soil section.
Question 3: The following figure shows the soil profile at a site for a proposed building....
Question 3: The following figure shows the soil profile at a site for a proposed building. The soil is a homogeneous, poorly graded sand. At the soil element A (as shown in the figure), if the increase in lateral effective stress is 20% of the increase in vertical effective stress, the soil element will failure. The coefficient of lateral earth pressure at rest. Ko is 0.5. Assume all stresses are principal stresses. The upper 4 m soil shares the same...
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 Ground Surface A soil profile is shown to the right. The groundwater table is...
Problem 1 Ground Surface A soil profile is shown to the right. The groundwater table is located 15 feet below ground. Calculate the total stress, pore water pressure and effective stress in the vertical and horizontal direction at points a, b, and c located Coarse Sand -120 lb/ft Ko 0.4 %at: 125 lb/ft3 a) 15, b) 40, and c) 58 feet below the ground surface. Stiff Clay = 110 lb/ft3 %at 115 lb/ft3 Ko= 1.3 58 Limestone Bedrock
2. The coefficient of lateral earth pressure at rest K is defined as sat K, (o'h/σ,v)...
2. The coefficient of lateral earth pressure at rest K is defined as sat K, (o'h/σ,v) where σ"n and σ,v are the effective horizontal and verti- cal normal stresses. For the soil stratum shown, Ko is determined to be 045, the saturated soil density Ysat is 18 kN/m2 and the water table is 2 m below ground surface. 2 m (a) Assuming the soil is saturated to ground surface and there is no seep- age, plot the at-rest (geostatic) σν,...
4. (10 pts) The soil profiles at a site is as follows (from the ground surface down); 5 m of very...
4. (10 pts) The soil profiles at a site is as follows (from the ground surface down); 5 m of very dense, saturated sand (saturated unit weight- 19.5 kN/m) 8 m of normally consolidated clay ( 7.5 kN/m, Ce-0.5) 15 m of clay (7'-80 kNan', σ'p-250 kN/m. (σ'max), Ce-0.4, Cer : 0.04). A layer of fill, 15m deep (y = 19 kN/m) will be added to the top of this profile. The water table is originally at the ground surface-...
2.) THE SOIL PROFILE SHOWS CONSISTS OF A LAYER OF DRY SAND 4m HICK WHICH OVERLIES...
2.) THE SOIL PROFILE SHOWS CONSISTS OF A LAYER OF DRY SAND 4m HICK WHICH OVERLIES A LAYER OF CLAY HAVING A THICKNESS OF 6m. GROUND WATER TABLE IS LOCATED AT THE INTERFACE OF THE SAND AND CLAY a.) COMPUTE THE EFFECTIVE STRESS AT THE BOTTOM OF THE CLAY LAYER b..) IF THE WATER TABLE RISES BY 2m, DETERMINE THE EFFECTIVE STRESS AT THE BOTTOM OF THE CLAY LAYER c.) IF THE WATER TABLE LOWERS BY 2m, DETERMINE THE EFFECTIVE...
Question 3c, how was the effective stress calculated for the depth of 2,6 and 10 m?...
Question 3c, how was the effective stress calculated for the
depth of 2,6 and 10 m? How was the Cp calculated? Is sigma 1 the
effective stress? What is sigma? Why d is 4?
1 3c In ε- Cp w-Σε disp ε. d do initial o Deformation depth d Strain (-) (m) 4 176.2 1.08 2 62 0.27 6 107 4 128.4 0.16 0.63 152 4 10 95.5 0.10 0.39 total 2.10 in 3) A 10 m wide and very...
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...
Question 3: Calculate the total stress, effective stress, and pore water pressure at points A and B for the soil profile shown in Figure 2.0 below. Assume specifie gravity value as 2.70, void ratio as 0.7, degree of saturation as 0.85, and water content as 28% Point Load = 500 kN 2.0m GWT 4.5m OA 5.0m .B Figure 2.0 Question 4: If the groundwater in the figure 2.0 were (a) to drop 2m below the surface, (b) to rise 2...
Detailed Solution
Q1. A soil section is comprised of two layers with the following properties: soil 1 (0 to 3 m): Pary-1 7.65 kN/m2, %,-1961 kN/m2, soil 2 (3 to 8 m): %at-20.59 kN/m? The water table is 1.5 m below the ground surface. Plot the total vertical stress, pore pressure, and effective vertical stress over the soil section.
Question 3: The following figure shows the soil profile at a site for a proposed building. The soil is a homogeneous, poorly graded sand. At the soil element A (as shown in the figure), if the increase in lateral effective stress is 20% of the increase in vertical effective stress, the soil element will failure. The coefficient of lateral earth pressure at rest. Ko is 0.5. Assume all stresses are principal stresses. The upper 4 m soil shares the same...
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 Ground Surface A soil profile is shown to the right. The groundwater table is located 15 feet below ground. Calculate the total stress, pore water pressure and effective stress in the vertical and horizontal direction at points a, b, and c located Coarse Sand -120 lb/ft Ko 0.4 %at: 125 lb/ft3 a) 15, b) 40, and c) 58 feet below the ground surface. Stiff Clay = 110 lb/ft3 %at 115 lb/ft3 Ko= 1.3 58 Limestone Bedrock
2. The coefficient of lateral earth pressure at rest K is defined as sat K, (o'h/σ,v) where σ"n and σ,v are the effective horizontal and verti- cal normal stresses. For the soil stratum shown, Ko is determined to be 045, the saturated soil density Ysat is 18 kN/m2 and the water table is 2 m below ground surface. 2 m (a) Assuming the soil is saturated to ground surface and there is no seep- age, plot the at-rest (geostatic) σν,...
4. (10 pts) The soil profiles at a site is as follows (from the ground surface down); 5 m of very dense, saturated sand (saturated unit weight- 19.5 kN/m) 8 m of normally consolidated clay ( 7.5 kN/m, Ce-0.5) 15 m of clay (7'-80 kNan', σ'p-250 kN/m. (σ'max), Ce-0.4, Cer : 0.04). A layer of fill, 15m deep (y = 19 kN/m) will be added to the top of this profile. The water table is originally at the ground surface-...
2.) THE SOIL PROFILE SHOWS CONSISTS OF A LAYER OF DRY SAND 4m HICK WHICH OVERLIES A LAYER OF CLAY HAVING A THICKNESS OF 6m. GROUND WATER TABLE IS LOCATED AT THE INTERFACE OF THE SAND AND CLAY a.) COMPUTE THE EFFECTIVE STRESS AT THE BOTTOM OF THE CLAY LAYER b..) IF THE WATER TABLE RISES BY 2m, DETERMINE THE EFFECTIVE STRESS AT THE BOTTOM OF THE CLAY LAYER c.) IF THE WATER TABLE LOWERS BY 2m, DETERMINE THE EFFECTIVE...
Question 3c, how was the effective stress calculated for the
depth of 2,6 and 10 m? How was the Cp calculated? Is sigma 1 the
effective stress? What is sigma? Why d is 4?
1 3c In ε- Cp w-Σε disp ε. d do initial o Deformation depth d Strain (-) (m) 4 176.2 1.08 2 62 0.27 6 107 4 128.4 0.16 0.63 152 4 10 95.5 0.10 0.39 total 2.10 in 3) A 10 m wide and very...
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