P4: 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 unit 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 pressures on a horizontal plane at a depth of 9 m below the ground surface. What will be the increase in the effective pressure at 9 m if the soil gets saturated by capillary, up to height of 1 m above the water table? GL Y sand = 17 kN/m³ Y sat sand =20 kN/m3 Ysat clay =18 kN/m3 case (1) Y = 17 kN/m³ E 4, Capillary zone 1 m Ysat =20 kN/m³ Y sat clay =18 kN/m3 case (2) k 3 m | + 3 m ,

P4: 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 unit 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 pressures on a horizontal plane at a depth of 9 m below the ground surface. What will be the increase in the effective pressure at 9 m if the soil gets saturated by capillary, up to height of 1 m above the water table? GL Y sand = 17 kN/m³ Y sat sand =20 kN/m3 Ysat clay =18 kN/m3 case (1) Y = 17 kN/m³ E 4, Capillary zone 1 m Ysat =20 kN/m³ Y sat clay =18 kN/m3 case (2) k 3 m | + 3 m ,

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.8P

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P4: 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 unit 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 pressures on a horizontal plane at a depth of 9 m below the ground surface. What will be the increase in the effective pressure at 9 m if the soil gets saturated by capillary, up to height of I m above the water table?
A clay layer 3.66 m thick rests beneath a deposit of submerged sand of 7.92 m thick. The top of the sand is located 3.05 m below the surface of a lake. The saturated unit weight of the sand is 19.62 kN/m3 and of the clay is 18.36 kN/m3. Compute (a) the total pressure (b) the pore water pressure and (c) the effective pressure all at the mid height of the clay layer. Draw the figure
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?
In typical deposit of submerged soil, the approximate depth at which the inter-granular pressure is equal to 60 kN/m² is: (Ysat = 30 kN/m³)
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 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.
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.
The bottom of a river is 9 m below the water surface. Underneath the bottom of the river is a layer of sand having a specific weight of 18 kN/m3. If the recorded pressure at the tunnel located at the bottom of the sand layer is 305 kPa, how thick is the sand layer?
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 ?
The water table is located at a depth of 4.0 m below the ground surface in a deposit of sand 16.0 m thick (Fig. 1). The sand is saturated above the water table. The total unit weight of the sand is 25 kN/m3. Calculate the (a) the total pressure, (b) the pore water pressure and (c) the effective pressure at depths 0, 4.0, 10.0, and 16.0 m from the ground surface, and draw the pressure distribution diagram.
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?