Which of the following statements are correct (select all that apply) ? Group of answer choices Boussinesq’s equations can be used to estimate the increase in total vertical stress within the soil below the foundation of a circular tank resting at the ground surface as long as the entire soil profile is linear-elastic, homogeneous and isotropic. The principle of superposition of loads can be used to combine the increase in vertical stress from various surface loads as long as long the underlying soil profile is homogeneous. If a soil profile consists of a soft clay layer near the surface underlain by a very stiff clay layer, Boussinesq’s equations would tend to over-estimate the increase in vertical stress within the upper soft clay layer due to a surface load. The influence depth associated with a surface load corresponds to the depth beyond which the relative increase in vertical stress after loading is negligible.

Which of the following statements are correct (select all that apply) ? Group of answer choices Boussinesq’s equations can be used to estimate the increase in total vertical stress within the soil below the foundation of a circular tank resting at the ground surface as long as the entire soil profile is linear-elastic, homogeneous and isotropic. The principle of superposition of loads can be used to combine the increase in vertical stress from various surface loads as long as long the underlying soil profile is homogeneous. If a soil profile consists of a soft clay layer near the surface underlain by a very stiff clay layer, Boussinesq’s equations would tend to over-estimate the increase in vertical stress within the upper soft clay layer due to a surface load. The influence depth associated with a surface load corresponds to the depth beyond which the relative increase in vertical stress after loading is negligible.

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 10.2CTP: A soil element beneath a pave ment experiences principal stress rotations when the wheel load, W,...

See similar textbooks

Similar questions

Which of the following statements are correct (select all that apply) A.Boussinesq’s equations can be reasonably used to estimate the increase in vertical stress within the founding soil for an embedded circular tank as long as the entire soil profile is linear-elastic, homogeneous and isotropic. B.Boussinesq’s equations can be reasonably used to estimate the increase in vertical stress within a deep soil deposit as long as the soil layer within the influence depth of the surface load is linear-elastic, homogeneous and isotropic. C.If a soil profile consists of a very stiff layer near the surface underlain by a softer layer, Boussinesq’s equations would tend to under-estimate the increase in vertical stress within the softer soil layer due to a surface load. D.If a soil profile consists of a soft layer near the surface underlain by a very stiff layer, Boussinesq’s equations would tend to under-estimate the increase in vertical stress within the upper layer due to a surface load.
Stresses acting on an infinitesimal soil element are shown in the figure (with o₂ > 0). The major and minor principal stresses are o, and o3, respectively. Considering the compressive stresses as positive, which one of the following expressions correctly represents the angle between the major principal stress plane and the horizontal plane? ox Tzx ·0x
A soil Element is shown in the Figure. Determine the Following: A. Maximum and Minimum Principal stresses B. Normal and Shear Stress on Plane AB
Civil engineering question A sample of soil (0.2 m x 0.2 m) is subjected to forces as shown. Determine the principal stresses and the stresses oriented at 30 degrees counter clockwise from the major principal stress plane.
A soil element is shown in the figure below. Determine the following: (in kPa) a. Maximum Principal Stress b. Minimum Principal Stress c. Normal Stress on plane AB d. Shear Stress on plane AB
A soil profile is shown in figure below. 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.
Q1: Find the increase in stress in (mPa) at soil element (A) due to the application of the external loads shown in figure (1) by using (1) The related formula (2) The related table Top View 5m Front View 730 kN 2m 트 Im 3m 2420 KN
Define Effective Stress and discuss its importance in soil mechanics.
A soil element beneath a pave ment experiences principal stress rotations when the wheel load, W, passes over it and moves away, as shown in Figure 10.51. In this case, the wheel load has passed over points A and B and is now over point C. The general state of stress at these points is similar to the one shown by a stress block at point D. The phenomenon of principal stress rotation influences the permanent deformation behavior of the pavement layers. Investigate how the magnitude and the orientations of the principal stresses vary with distance from the point of application of the wheel load. Consider the case shown in Figure 10.51. An unpaved aggregate road with a thickness of 610 mm and unit weight of 19.4 kN/m3 is placed over a soil subgrade. A typical single-axle wheel load, W = 40 kN, is applied uniformly over a circular contact area with a radius of R = 150 mm (tire pressure of 565 kN/m2). The horizontal and shear stresses at each point are calculated from a linear elastic finite element analysis for a two-layer pavement and are presented in the following table. a. Use Eq. (10.28) to calculate the vertical stress increases at soil elements A, B, and C that are located at radial distances 0.457,0.267, and 0 m, respectively, from the center of the load. Determine the total vertical stress (y) due to wheel load, the overburden pressure at each point, and enter these values in the table. b. Use the pole method to determine the maximum and minimum principal stresses (1 and 3) for elements A, B, and C. Also determine the orientation (s) of the principal stress with respect to the vertical. Enter these values in the table. c. Plot the variations of 1 and s, with normalized radial distance, r/R, from the center of loading.
A Soil Element is shown in figure . Determine the Following: a. Maximum and Minimum Principal Stress b. Normal and Shear stresses on plane AB
A series of direct shear tests have been performed on a soil, using a circular shear box witha diameter D = 2.5 in. The data from these tests, in terms of normal force applied and maximum shearforce at failure, are listed below. Calculate the normal stress and the shear stress at failure in each test,graph the results on a σ−τ max plot and determine the cohesion and friction angle of this soil. Plot toscale, show units, and make sure to use the same scale for both axes.
Q-2 For the soil profile shown in the figure below calculate and plot the total stress, pore water pressure and effective stress at points A, B, C and D. Give the following Data :