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.

Calculate the value of the effetive stress at the bottom of the given soil.

A soil profile consisting of three layers is shown. Plot the variation of effective stress with depth. The layer properties are tabulated below. Final calculated answer should be in 3 decimal places.

Triaxial tests performed on samples of aeolin sand. The failure conditions in terms of effective stress are (ov, 0h) = (515, 100), (1250, 200), (3500, 400), and (5325, 800) kPa. Using (s, t) space, determine the cohesion and friction angle. What is the orientation of the major principal stress with respect to the failure plane? Determine this graphically.

From the given soil element, using the graphical method (Mohr's circle), determine the following: A) The values for the maximum and minimum principal stresses (0₁ and 3) B) The location of the pole C) The normal stress (a) and shear stress (ta) on the shear plane (dashed red line) D) In your own words and no more than a few sentences, explain the advantage of identifying the pole's location in a Mohr's circle graphical analysis. 40° 0 = 8 kPa Y -T₁ = 3 kPa yx T = -3 kPa xy o = 2 kPa X

From the following given soil element, using the graphical method (Mohr’s circle),determine 1) the maximum and minimum principal stresses, 2) maximum shear stress,and 3) the normal and shear stresses on plane AB (assume to be the failure surface).Confirm your answer with analytical equations.Please practice more problems from your textbook.

Why do soil mechanics need to calculate the effective stress of the soil

If both the major and minor principal stresses for a soil element are known, as well as the strength parameters c'and o': A) Derive the formula that gives the orientation (the angle 0) of the theoretical failure plane. Hint: for the diagram below, assume 0₁ is acting in the vertical direction on the soil element (typical case) - i.e. the orientation of the failure plane with be measured on the Mohr's Circle from the Pole (which will be at 03). Remember a useful property of circles in terms of angles... Øs 03 01 B) Relate your answer from Part A to the failure plane assumed in Rankine's Active Earth Pressure. You can show this relationship with a simple sketch.

answer in complete solution pls

A triaxial test is performed on a cohesionless soil. The soil failed under the following conditions: confining pressure = 250 kPa; deviator stress = 450 kPa. Evaluate the following: a. The angle of shearing resistance of the soil b. The shearing stress at the failure plane c. The normal stress at the failure plane