After conducting a tri-axial test on a sand sample, the normal and shearing stress on the failure plane at failure was found to be 475kPa and 350kPa, respectively. Which of the following most nearly gives the plunger stress?

Samples from sandstone were collected from two different depths (80m and 200m) and triaxial shearing tests were performed to estimate the shear strength parameters. From each depth, two different specimens were tests at distinct isotropic confining pressures and from the experiments the deviatoric stress at failure was assessed. The results from these experiments are summarized in Table 1.1. Table 1.1 – Results of triaxial shearing tests at failure for the sandstone samples collected from different depths (Question 1) Specimen No. q (MPa) at failure Collection оз (MPa) depth (m) 1 80 0.600 3.325 2 80 1.800 8.179 3 200 0.600 5.310 4 200 1.800 11.103 (a) Determine the angle of shear strength and cohesion of the sandstone for each of the two different depths using the Mohr-Coulomb (linear) failure criterion based on total stress principle. (b) During the triaxial test measurements, local strain gauges were attached to the specimens for high quality measurements to be performed. It was…

Two undrained triaxial tests were conducted on soil specimen, and they gave the following results: Sample Confining Pressure Deviator Stress A 350 kN/m² B 500 kN/m² 150 kN/m² 300 kN/m² The shear strength of sample A in the plane of it's normal stress is A 588 kPa B 283 kPa C 730 kPa D 165 kPa Correct Option