1.3. Significance of Shear Strength

Try these first

1. 1.

   What is shear strength in simple terms?

   Hint

   Relate it to how different materials behave under pressure.

2. 2.

   What are two sources of shear strength in soil?

   Hint

   Think of what either keeps soil together or helps it resist motion.

3. 3.

   What determines the shear strength of soil?

   • Cohesion and friction
   • Weight of soil
   • Moisture content

   Hint

   Consider what holds the particles together.

4. 4.

   True or False: Shear strength increases with moisture content in all soil types.

   • True
   • False

   Hint

   Think about how water affects soil structure.

5. 5.

   Calculate the factor of safety for a slope that has a shear strength of 20 kPa and a shear stress acting on it of 15 kPa.

   Hint

   What ratio do you need to find?

6. 6.

   Discuss the implications of using clay as a foundation soil in wet conditions and its impact on shear strength.

   Hint

   Think about how water affects the texture and structure of soil.