Situation 1.A clay layer 12ft thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand islocated 10ft below the surface of a lake. The saturated unit weight of the sand is 125 lb /ft° and of theclay layer is 117 Ib /ft³.1. Compute the total vertical pressure at the mid height of the clay layer.a. 4390psfb. 4577 psfc. 4963psfd. 4800psf2. Compute the pore water pressure at the mid height of the clay layer.a. 2659psfb. 2620 psfc. 2668 psfd. 2680psf3. Compute the effective vertical pressure at the mid height of the clay layer.a. 1731psfb. 1953 psfc. 2295psfd. 1273psf Situation 2.A dense silt layer has the following properties.void ratio = 0.30eff. Diameter D10 = 10µmcapillary constant (c)=0.20 cm²Ground water level is 8.0m below the ground surface.4. Calculate the height of capillary rise in the silt.b. 7.67ma.6.67 mc. 6.07md. 7.17m5. Calculate the vertical effective stress in kpa at 5m depth, assume y, = 26.5 kn/m²and that the soilabove the capillary action rise and ground surface is partially saturated at 50%.b. 144.31kpaа. 141.13 kрас. 174.41краd. 154.1kpa6. Calculate the effective vertical stress at 10m depth assuming y, = 26.5 kn/m²and that the soil abovethe capillary action rise and ground surface is partially saturated at 50%.а. 205.28 kpab. 206.82kpaс. 502.8kpad. 200.58kpa

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Situation 1. A clay layer 12ft thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand is 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 Ib /ft³. 1. Compute the total vertical pressure at the mid height of the clay layer. a. 4390psf b. 4577 psf c. 4963psf d. 4800psf 2. Compute the pore water pressure at the mid height of the dlay layer. a. 2659psf b. 2620 psf c. 2668 psf d. 2680psf 3. Compute the effective vertical pressure at the mid height of the clay layer. a. 1731psf b. 1955 psf c. 2295psf d. 1273psf

Situation 1. A clay layer 12ft thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand is 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 Ib /ft³. 1. Compute the total vertical pressure at the mid height of the clay layer. a. 4390psf b. 4577 psf c. 4963psf d. 4800psf 2. Compute the pore water pressure at the mid height of the dlay layer. a. 2659psf b. 2620 psf c. 2668 psf d. 2680psf 3. Compute the effective vertical pressure at the mid height of the clay layer. a. 1731psf b. 1955 psf c. 2295psf d. 1273psf

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter15: Braced Cuts

Section: Chapter Questions

Problem 15.5P

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A clay layer 12ft thick rests beneath a deposit of submerged sand 26ft thick. The top of the sand is located 10ft below the surface of a lake. The saturated unit weight of the sand is 125 lb /ft³ and of the clay layer is 117 lb /ft³. 1. Compute the total vertical pressure at the mid height of the clay layer. a. 4390psf b. 4577 psf c. 4963psf d. 4800psf 2. Compute the pore water pressure at the mid height of the clay a. 2659psf b.2620 psf c. 2668 psf d. 2680psf 3. Compute the effective vertical pressure at the mid height of the clay a. 1731psf b.1956 psf c. 2295psf d. 1273psf
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