6. A uniformly loaded horizontal circular area of radius 3 m is loaded with uniform loading intensity of 75 kN/m2 at the surface of a soil strata. Calculate the increase in vertical stress at depth of 6.5 m at the following locations in the soil strata 1) Exactly below the centre of loaded area that is at central vertical axis. 2) At a horizontal distance of 3 m from the centre vertical axis. 3) At a horizontal distance of 4.5 m from the centre vertical axis.

6. A uniformly loaded horizontal circular area of radius 3 m is loaded with uniform loading intensity of 75 kN/m2 at the surface of a soil strata. Calculate the increase in vertical stress at depth of 6.5 m at the following locations in the soil strata 1) Exactly below the centre of loaded area that is at central vertical axis. 2) At a horizontal distance of 3 m from the centre vertical axis. 3) At a horizontal distance of 4.5 m from the centre vertical axis.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

3. | Calculate the change in total vertical normal stress (o) and in effective stress (o) ai a depth of 10 feet in a saturated clay layer if the water table is dropped from the ground surface to a depth of 20 feet below the ground surface. The clay has a water content of 35%, S = 100% and G, = 2.75. Assume that no change in degree of saturation or water content occurs when the water table is lowered. Take into account the capillary stresses generated.
A soil has an unconfined compressive strength of 120 kN/m2. In a triaxial compression test a specimen of the same soil when subjected to a chamber pressure of 40 kN/m2 failed at an additional stress of 160 kN/m2. Determine angle of friction. Draw the Mohr Circle
For the soil profile shown in the figure (1): 1- Calculate total vertical stress at the middle of the last layer 2- Draw vertical effective stress diagram 3- Find the total, pore water pressure and effective stresses at the middle of each layer N.G.S Ya=14.1 kN/m 2m e=0.54 Gs=2.75 2m 4m 1.5m Ysat=12.4 kN/m³ Ysat=18.6 kN/m 3.5m Dll
. A soil profile is shown in figure below. Dry sand Yay- 165 KNm 6m Groundwater table Saturated sand 13m Yu 19.25 kN/m" Dry sand Saturated sand Clay Calculate the following: a. Effective stress at point A in kPa. b. Effective stress at point B in kPa. c. Effective stress at point C in kPa.
7.12 A sand specimen was subjected to a drained shear test using hollow cylin- der test equipment. Failure was caused by increasing the inside pressure while keeping the outside pressure constant. At failure, o, = 193 kN/m² and o; = 264 kN/m². The inside and outside radii of the specimen were 40 and 60 mm, respectively. (a) Calculate the soil friction angle. (b) Calculate the axial stress on the specimen at failure.
Q: A consolidated-drained tri-axial test was conducted on a normally consolidated clay. The results are as following: confining stress, G3 = 150 kN/m² and deviator stress, (Aod)t = 150 kN/m². i) Determine angle of friction, q; ii) Determine angle 0 that the failure plane makes with the major principal plane; iii) Find the normal stress and the shear stress ty on the failure plane; and iv) Determine the effective normal stress on the plane of maximum shear stress. Express your results in two decimal places.
1.A dry sand is known to have an angle of internal friction of 29. A triaxial test is planned, where the confining pressure will be 41 kPa. What is the maximum axial stress, in kPa, (major principal stress) that can be applied? Calculate the value to 1 decimal place. Do not provide units in your answer. 2.A clay soil is subjected to a triaxial test under unconsolidated-undrained conditions. At failure, the major and minor principal stresses are 8401 psf and 4875 psf, respectively. What is the shear strength of this soil if the confining pressure is doubled? Provide your answer in psf with no decimals.
A. Compute the effective stress at the bottom of the clay. B. If the water table rises to the level of the soil surface, what is the effective stress at the bottom of the clay? Fground surface Y-15.6 kN/m Yrar-16.6 KN/m3 4 m water table Clay 5 m:
The water table in an 8 m thick silty sand deposit lies at a depth 3 m below the ground level. The entire soil above the water table is saturated by capillary water and the saturated unit weight is 18.8 kN/m^3 . Calculate the a) total vertical effective stress, b) the porewater pressure, and c) the vertical effective stress at 8 m below the ground level. Express answers in kPa rounded to the first decimal place.
In a drained triaxial test on consolidated clay the stress and angle are as follows: Deviator stress is 20 lb/in2 and friction angle is 21°. Calculate the effective confining pressure at failure.? a) 21 lb/in2 b) 22.2 lb/in2 c) 25.4 lb/in 2 d) 17.9 lb/in2