A deposit of sand has porosity of 35% and G = 2.7. The soil is dry in top 1.5 m depth, it has 15% moisture content in next 1.8 m depth and it is submerged below it. Find : (i) Effective pressure at a depth of 8 m below the ground level. (ii) Change in effective pressure if the water table suddenly drops to a level of 6 m below the ground level. (iii) Shear strength of the soil on horizontal plane at 8 m depth for both the positions of ground water table if o=30°.

A deposit of sand has porosity of 35% and G = 2.7. The soil is dry in top 1.5 m depth, it has 15% moisture content in next 1.8 m depth and it is submerged below it. Find : (i) Effective pressure at a depth of 8 m below the ground level. (ii) Change in effective pressure if the water table suddenly drops to a level of 6 m below the ground level. (iii) Shear strength of the soil on horizontal plane at 8 m depth for both the positions of ground water table if o=30°.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.13P

See similar textbooks

Similar questions

a dense silt layer has the following properties: void ratio = 0.50, effective diameter d10 = 10 um, capillary constant c = 0.20 cm2. free ground water level is 8.0 m below the ground surface. find the vertical effective stress in kpa at 5m depth. assume unit weight of solids = 26.5 kn/m3 and that the soil = 26.5 kn/m3 and that the soil above the capillary action rise and ground surfaces is partially saturated at 50% from the problem above, find the vertical effective stress at 10m depth. assume unit weight of solids=26.5kN/m3 and that the solid above the capillary action rise and ground surface is partially saturated at 50%.
A dense silt has the following properties: Void ratio (e) = 0.40, SpecificGravity (Gs) = 2.70, Effective diameter d10 = 1x10^-6 m, Capillary constant (C) = 0.20 cm^2. Free ground water level is 8.0 m below the ground surface. a. Find the height of capillary rise in the silt. b. Find the vertical effective stress in kPa at 5m depth. Assume that the soil abovethe capillary zone or capillary action rise to be dry soil and the soil within thecapillary action be partially saturated (degree of saturation, S) at 50%. c. Find the vertical effective stress at 10m depth. Assume that the soil above thecapillary zone or capillary action rise to be dry soil and the soil within the capillaryaction be partially saturated (degree of saturation, S) at 50%.
A dense silt layer has the following properties: e=0.30, D10=10µm and capillary constant = 0.20cm2 Free ground water level is 8m below the ground surface. Determine the vertical effective stress (kPa) at 5m depth (point A). Assume unit weight of solids = 26.5 KN/m3 and that the soil above the capillary rise and ground surface is partially saturated at 50%.
A dense silt layer has the following properties.void ratio = 0.30eff. Diameter ?10 = 10??capillary constant (c)=0.20 cm²Groundwater level is 8.0m below the ground surface 1. Calculate the height of capillary rise in the silt. 2. Calculate the vertical effective stress in kpa at 5m depth, assume ?? = 26.5 ??/?³and that the soil above the capillary action rise and ground surface is partially saturated at 50%. 3. Calculate the effective vertical stress at 10m depth assuming ?? = 26.5 ??/?³and that the soil above the capillary action rise and ground surface is partially saturated at 50%.
A uniform homogeneous sand deposit of specific gravity 2.60 and void ratio 0.65 extends to large depth. The ground water table is 2 m from G.L. Determine the effective stress in kPa at depth of 2 m. Assume that the soil from 1 m to 2 m has capillary moisture leading to degree of saturation of 60%.
The subsoil at the site consists of a 10 m thick homogeneous layer of dense sand having the following properties: Dry unit weight = 16 kN/m3, Gs = 2.68, angle of friction = 35 degrees The natural ground water table lies at 2 m below the ground surface. Determine the shear strength at 10 m depth (kPa).
A dense silt layer has the following properties:Void ratio = 0.30Effecive diameter = 10umCapillary constant = 0.20 cm2Free ground water level is 8 m below the ground surface.a. Find the height of the capillary rise in the silt.b. Find the vertical effective stress in kPa at a depth of 5 m. Assume soil unit weight of 26.5 kN/m3 and that of soil above the capillary action rise and round surface is partially saturated at 50 %.c. Find the vertical effective stress in kPa at a depth of 10 m. Assume soil unit weight of 26.5 kN/m3 and that of soil above the capillary action rise and round surface is partially saturated at 50 %.......
A 2m clay layer has values of e = 0.92 , Gs = 2.72 and liquid limit of 40%. Above the clay is a 3m thick layer sand with e = 0.50 and Gs = 2.62. The water table is located 1.6 m below the ground surface having a unit weight of 17.3 kN/cu. Meter, determine the following: a. Compression index of clayb. Effective pressure at the midpoint of clayc. Primary settlement for normally consolidated clay.......
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 dense silt layer has the following properties: e =0.406 D10= 10.1 um Capillary constant = 0.209 sq.cm Free ground water level is 8m below the ground surface. 1.) Find the height of capillary rise in the siltin meters. 2) Find the vertical effective stress at 6m depth. Assume ys = 26.51 kn/m3 and the soil above capillary action rise and ground surface is partially saturated at 79%.
A uniform soil deposit has a void ratio 0.6 and specific gravity of 2.65. The natural ground water is at 2.5 m below natural ground level. Due to capillary moisture, the average degree of saturation above ground water table is 50%. Determine effective pressure in kPa at a depth of 6 m. a. 46.40 b. 323.9 c. 80.66 d. 117.9
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?