The soil profile at the site consists of a 5.0 m sand layer underlain by 13 m of clay layer. The groundwater table is at a depth of 2.8 m below the ground surface. The sand has a unit weight of 19 kN/m3 above the groundwater table and 20 kN/m³ below the ground water table. Meanwhile, the saturated unit weight of clay is 15.7 kN/m3. At a depth of 11m from the ground lever, calculate the Total Pressure, Porewater Pressure, and the Effective Pressure (in kPa).

The soil profile at the site consists of a 5.0 m sand layer underlain by 13 m of clay layer. The groundwater table is at a depth of 2.8 m below the ground surface. The sand has a unit weight of 19 kN/m3 above the groundwater table and 20 kN/m³ below the ground water table. Meanwhile, the saturated unit weight of clay is 15.7 kN/m3. At a depth of 11m from the ground lever, calculate the Total Pressure, Porewater Pressure, and the Effective Pressure (in kPa).

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.8P

See similar textbooks

Similar questions

Estimate the lateral earth pressure developed at a depth 5 m below the soil surface of a loose sand deposit (wet unit weight of soil is 17.5 kN/m3). Also estimate the lateral pressure for the same depth if the sand is in a dense condition (unit weight is 20.5 kN/m3). What would be the total lateral pressure for the loose sand condition described if the water table were at the ground surface?
A dense silt layer has the following properties: void ratio = 0.7, specific gravity = 2.58. Free ground water is 10.58 m. below the ground. Capillary action rise will reach 7.46 meters. The soil above capilary action rise is dry while within the zone, it is saturated at 54.74 %. Determine the effective pressure (in kPa) at a depth of 7.5 meters from the ground surface.
A dense silt layer has the following properties: void ratio = 0.6, specific gravity = 2.55. Free ground water is 9.85 m. below the ground. Capillary action rise will reach 7.94 meters. The soil above capilary action rise is dry while within the zone, it is saturated at 54.63%. Determine the effective pressure (in kPa) at a depth of 7.05 meters from the ground surface. Round off to three decimal places.
The subsoil strata at a site consist of fine sand 3.0 m thick overlying a stratum of clay 2.8 m thick. Under the clay stratum lies a deposit of coarse sand extending to a considerable depth. The water table is 2.8 m below the ground surface. Assuming the top fine sand to be saturated by capillary water, calculate the effective pressures at ground surface and at depths of 3.0 m, 5.8 m and 8.0 m below the ground surface. Assume for fine sand G = 2.65, e = 0.83 and for coarse sand G = 2.79, e = 0.53. What will be the change in effective pressure at depth 3.74 m, if no capillary water is assumed to be present in the fine sand and its bulk unit weight is assumed to be 16.88 kN/m3 . The unit weight of clay may be assumed as 19.75 kN/m3. Comment on the effect of the present of groundwater on design of earth structures?
Estimate the lateral earth pressure at a depth 20 ft (6.1 m) below the ground surface in a loose sand deposit. The wet unit weight of the sand is 115 pcf (19 kN/m3). What would the total lateral pressure be if the water table rose to the ground surface (in psf or kPa)?
A dense silt has the following properties: void ratio = 0.64, specific gravity = 2.5. Free ground water = 10.23m below the ground. Capillary action rise will reach 5.6m. The soil above the capillary action rise is dry while within the zone, it is saturated at 51.53%. Determine the effective pressure (in kPa) at a depth of 7.42m from the ground surface.
Question 32 A dense silt layer has the following properties: void ratio = 0.66, specific gravity = 2.5. Free ground water is 9.47 m. below the ground. Capillary action rise will reach 6.66 meters. The soil above capilary action rise is dry while within the zone, it is saturated at 52.77%. Determine the effective pressure (in kPa) at a depth of 7.42 meters from the ground surface. Round off to three decimal places.
A layer of saturated clay 5 m thick is overlain by sand 4.0 m deep. The water table is 3 m below the top surface. The saturated weights of clay and sand are 18 kN/m3 and 20 kN /m3, respectively. Above the water table, the unit weight of sand is 17 kN/m3. Calculate the effective pressure on a horizontal plane at a depth of 9 m below the ground surface. What will be the increase in effective pressure at 9 m, if the soil gets saturated by capillary up to height of 1 m above water table?
The water table in a deep deposit of very fine sand is 1m below the ground surface. Above the water table, the sand is saturated by capillary water. The density of the saturated sand is 2.03 Mg/m³. What is the effective vertical pressure on a horizontal plane at a depth of 4m below the ground surface?
What is the intensity of active earth pressure at a depth of 10.0 m in dry sand with an angle of shearing resistance of 30 degrees and unit weight of 18kN /m ^ 3 ?
A dense silt layer has the following properties: void ratio e = 0.50, effective Diameter D10 = 10 μm, capillary constant C = 0.20 cm2. The free groundwater level is 8m below the ground surface. Assume unit weight of solids y= 26.50kN/m3. Find the vertical effective stress at 10m depth. Assume that the soil above the capillary zone is partially saturated at 50%.
A uniform soil deposit has a void ratio of 0.6 and specific gravity of 2.65. The natural ground water is at 2.5m below natural ground level. The average degree of saturation above ground water table is 50%. What is the effective pressure at 6.0 m depth?