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Problem 4. A 20m thick submerged saturated clay layer has water content of 57%. The specific gravity of the solid particle is 2.84. 1. Determine the density of the clay in kg/m'. 2. Determine the total vertical stress at the bottom of the clay layer in kpa. 3. Determine the effective vertical stress at the bottom of the clay layer in kpa.

Problem 4. A 20m thick submerged saturated clay layer has water content of 57%. The specific gravity of the solid particle is 2.84. 1. Determine the density of the clay in kg/m'. 2. Determine the total vertical stress at the bottom of the clay layer in kpa. 3. Determine the effective vertical stress at the bottom of the clay layer in kpa.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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Problem 4. A 20m thick submerged saturated clay layer has water content of 57%. The specific gravity of the solid particle is 2.84. 1. Determine the density of the clay in kg/m². 2. Determine the total vertical stress at the bottom of the clay layer in kpa. 3. Determine the effective vertical stress at the bottom of the clay layer in kpa. Problem 5. A dense silt layer has the following properties. void ratio = 0.30 eff. Diameter D10 = 10µm capillary constant (c)=0.20 cm² Ground water level is 8.0m below the ground surface. 1. Find the height of capillary rise in the silt. 2. Find the vertical effective stress in kpa at 5m depth, assume y, = 26.5 kn/m²and that the soil above the capillary action rise and ground surface is partially saturated at 50%. 3. Find the effective vertical stress at 10m depth assuming Ys = 26.5 kn/m²and that the soil above the capillary action rise and ground surface is partially saturated at 50%.
Transcribed Image Text:Problem 4. A 20m thick submerged saturated clay layer has water content of 57%. The specific gravity of the solid particle is 2.84. 1. Determine the density of the clay in kg/m². 2. Determine the total vertical stress at the bottom of the clay layer in kpa. 3. Determine the effective vertical stress at the bottom of the clay layer in kpa. Problem 5. A dense silt layer has the following properties. void ratio = 0.30 eff. Diameter D10 = 10µm capillary constant (c)=0.20 cm² Ground water level is 8.0m below the ground surface. 1. Find the height of capillary rise in the silt. 2. Find the vertical effective stress in kpa at 5m depth, assume y, = 26.5 kn/m²and that the soil above the capillary action rise and ground surface is partially saturated at 50%. 3. Find the effective vertical stress at 10m depth assuming Ys = 26.5 kn/m²and that the soil above the capillary action rise and ground surface is partially saturated at 50%.
Problem 1. The water table in a certain deposit of soil is at a depth of 2m below the ground surface. The soil consists of clay up to depth of 4m from the ground and below which lies sand. The clay soil is saturated even above the water table: Clay strata: w = 30%, G, = 2.72 Sandy Strata: w = 26%, G, = 2.64 1. Compute the total pressure. 2. Compute the pore water pressure. 3. Compute the effective stress pressure at a depth of 8m below the ground surface. Problem 2. A clay layer thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand located 10ft below the surface of a lake. The saturated unit weight of the sand is 125 lb /ft and of the clay layer is 117 lb /ft?. 1. Compute the total vertical pressure at the mid height of the clay layer. 2. Compute the pore water pressure at the mid height of the clay layer. 3. Compute the effective vertical pressure at the mid height of the clay layer. Problem 3. A 4m thick of clay is overlain by 4m thick of sand. The ground water table is 1m below the natural grade line. Clay and sand have saturated unit weights of 19.5 and 17.3 kn/m³ respectively. Sand above the water retains water content of 30%. LL and void ratio of clay are respectively 60% and 27.3% Specific gravity of sand solid is 2.7. 1. Find the compression index. 2. Find the moist unit weight of sand above the water table. 3. Find the effective soil pressure at mid clay layer.
Transcribed Image Text:Problem 1. The water table in a certain deposit of soil is at a depth of 2m below the ground surface. The soil consists of clay up to depth of 4m from the ground and below which lies sand. The clay soil is saturated even above the water table: Clay strata: w = 30%, G, = 2.72 Sandy Strata: w = 26%, G, = 2.64 1. Compute the total pressure. 2. Compute the pore water pressure. 3. Compute the effective stress pressure at a depth of 8m below the ground surface. Problem 2. A clay layer thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand located 10ft below the surface of a lake. The saturated unit weight of the sand is 125 lb /ft and of the clay layer is 117 lb /ft?. 1. Compute the total vertical pressure at the mid height of the clay layer. 2. Compute the pore water pressure at the mid height of the clay layer. 3. Compute the effective vertical pressure at the mid height of the clay layer. Problem 3. A 4m thick of clay is overlain by 4m thick of sand. The ground water table is 1m below the natural grade line. Clay and sand have saturated unit weights of 19.5 and 17.3 kn/m³ respectively. Sand above the water retains water content of 30%. LL and void ratio of clay are respectively 60% and 27.3% Specific gravity of sand solid is 2.7. 1. Find the compression index. 2. Find the moist unit weight of sand above the water table. 3. Find the effective soil pressure at mid clay layer.
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