In an Oedometer apparatus, a specimen of fully saturated clay has been consolidatedunder a vertical pressure of 50 kN/m³ and is presently at equilibrium. The effective stressand pore water pressure immediately on increasing the vertical stress to 150 kN/m²,respectively are(a) 50 kN/m² and 100 kN/m²(c) 150 kN/m² and 0(b) 100 kN/m² and 50 kN/m²(d) 0 and 150 kN/m²

Given, Find the effective stress and vertical stress in the Odeometer apparatus ?Where, Vertical…

Answered: The effective stress

Engineering

Civil Engineering

The effective stress

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter10: Stresses In A Soil Mass

Section: Chapter Questions

Problem 10.9P: For the same line loads given in Problem 10.8, determine the vertical stress increase, z, at a point...

See similar textbooks

Similar questions

Refer to the flexible loaded rectangular area shown in Figure 10.47. Using Eq. (10.36), determine the vertical stress increase below the center of the loaded area at depths z = 3, 6, 9, 12, and 15 m. Figure 10.47
A soil profile consists of a clay layer underlain by a sand layer, as shown in Figure. If a tube is inserted into the bottom sand layer and the water level rises to 1 m above the ground surface, determine the vertical effective stresses and porewater pressures at A, B, and C. What is the value of the porewater pressure at A to cause the vertical effective stress there to be zero?
Consolidation of an undrained clay occurs at an effective pressure of 100 kPa and a shear stress of 40 kPa. The ratio of effective pressure to shear stress in drained clay is 2 to 1. If the shear stress at zero effective pressure, To, is 10 kPa, what is the pore water pressure at failure? A. 10 kPa в. 40 кра с. 53 кра D. 67 kPa
The following figure is a layer of sand (γ s a t=130 lb/ft3 ) in a tank of water. If point C is located at the middle of the soil layer, what is the effective stress at point C: (a) when the valve is closed (there is no seepage) (b) when the valve is open (there is downward seepage)
From the given soil formation of the soil with the following properties is shown in the figure. (see picture below) Compute the total stress at the mid-layer of the clay. (Answer: ) Compute the effective stress at the mid layer of the clay. If a load of 1800 kN is acting on the footing 2m x 2m is placed on the ground, find the stress increase at the mid layer of the clay assuming a stress distribution of 1 horizontal to 2 vertical. *unit weight of dry sand = 14.72 kN/m3*
The stresses on a failure plane in a drained triaxial test on sand are as Follows: Normal Stress nf = 100 kN/m2 Shear Stress τf = 40 kN/m2 Required: a) Determine the angle of internal friction and angle of failure plane b) Find the major and minor principle stresses (1 , 3 )
A soil profile consists of a sand layer underlain by a clay layer, as shown. If the degree of saturation of the sand above water table was 50%. Saturated and dry unit weight of sand are 21.2 kN/m^3 and 18.22 kN/m^3 respectively. The saturated unit weight of clay is 18 kN/m3. Determine the total stress, pore pressure and effective stress at point A,B,C.
A borehole at a site reveals the soil profile shown below. Calculate the effective stress (σ’) in kN/m2 at the bottom of the sand layer. 2 m Water 3 m Clay, Void ratio = 0.8, Gs = 2.6 15 m Sand, Void ratio = 0.6, Gs = 2.7
At what depth would the total vertical stress in a deposit of clay (e = 0.9, Gs = assume, consider 4 significant figures) overlain by 3 meters of sand (e = 1.1, assume Gs with 4 significant figures) be 220 kPa if the water table is 2 meters below the ground surface and saturation of 20 percent exists above it? What is the effective stress at the same depth? Draw your stress diagrams up until 2 meters deeper than the point at which the stress is 220 kPa.
From the given soil formation of the soil with the following properties is shown in the figure. (see picture below) Compute the total stress at the mid-layer of the clay. (Answer: 260.745 kPa) Compute the effective stress at the mid layer of the clay. (Answer: 147.93 kPa) If a load of 1800 kN is acting on the footing 2m x 2m is placed on the ground, find the stress increase at the mid layer of the clay assuming a stress distribution of 1 horizontal to 2 vertical. (Answer: 11.64 kPa) *unit weight of dry sand = 14.72 kN/m3*
A sample of ocean sand was retrieved from 7 m below the surface. The sample had been under a vertical stress Ov of 150 kN/m³, a horizontal stress Oh of 250 kN/m³, a shear stress of 86.6 kN/m. If the angle theta between the vertical stress and the principal stress is 60°, calculate the angle of internal friction of the soil. [Hint: you must sketch the Mohr circle of stresses] Please explain clearly and step by step
For a site, there is a layer of sand, 5.3m thick, that lies over a clay layer of 1.2m. The water table is 1.3m below the ground surface. The saturated unit weights of the sand and clay are 21.6 kN/m3 and 18.8 kN/m3, respectively. The unit weight of sand above the water table is 17.2 kN/m3. Determine the total vertical stress, porewater pressure and effective vertical stress at the bottom of each layer. Plot the values found in (a) against the depth below ground level. If the water table rises up to an elevation of 0.7 m above the ground level, what will the total vertical stress, pore water pressure and effective vertical stress at the bottom of the clay layer?