2.6. Shear Strength of Soils

Try these first

1. 1.

   What equation represents the Mohr-Coulomb failure criterion?

   Hint

   Consider the relationship between shear strength, cohesion, and normal stress is involved.

2. 2.

   Name one type of shear test.

   Hint

   Think of tests that actively measure shear resistance.

3. 3.

   Which parameter is not part of the Mohr-Coulomb equation?

   • Cohesion (c)
   • Angle of Internal Friction (ϕ)
   • Compressibility Index (Cc)

   Hint

   Review the components of the shear strength equation.

4. 4.

   True or False: The Direct Shear Test can be used for both granular and cohesive soils.

   • True
   • False

   Hint

   Consider the versatility of the Direct Shear Test in different soil conditions.

5. 5.

   A pavement overlay is considered for an area with a clay subgrade. The clay has been tested and shows low shear strength. Discuss the implications for pavement design and stabilization techniques.

   Hint

   Consider both engineering principles and materials used for stabilization.

6. 6.

   Compare and contrast the Direct Shear Test and Triaxial Shear Test under practical conditions with their results influencing construction decisions.

   Hint

   Factors of efficiency versus accuracy come into play.