(Solved):   Please Please answer all parts of this question. Thank you!  d) Discuss why there is no ...

 

Please Please answer all parts of this question. Thank you!

 d) Discuss why there is no need to plot the Mohr circle to determine the failure envelope when analyzing the direct shear test results. (5%)

4. Calculation and discussion - Direct shear test (20%) Answer the following questions related to the direct shear test: a. To determine the soil shear strength of the soil sample in the figure, what is the normal stress that should be applied in the direct shear test? Assume a reasonable soil unit weight. (5%) 3m TXXX ? 2m Soil sample b. Indicate the soil cohesion c' and friction angle o' on the following Mohr-Coulomb diagram, and write down the equation of Mohr-Coulomb failure criteria. (5%) .C BX .A X: test points o' c. Determine the soil status (stable or failure) at stress points A, B, and C. (5%)