2.2. Shear strength

Try these first

1. 1.

   What is shear strength?

   Hint

   Think about how soil behaves under pressure.

2. 2.

   Name one factor that influences the shear strength of soil.

   Hint

   Consider what happens when you change the water level in soil.

3. 3.

   What primarily affects the shear strength of granular soils?

   • Moisture content
   • Compaction
   • Soil structure

   Hint

   Think about how packing increases strength.

4. 4.

   True or False: Cohesive soils retain better shear strength when compacted dry of optimum moisture content.

   • True
   • False

   Hint

   Remember the effects of moisture on clay structure.

5. 5.

   A construction project requires a foundation built on clay soil. The construction engineer notes that the soil becomes too wet, potentially affecting shear strength. What recommendations could be given to maintain shear strength in this scenario?

   Hint

   Consider how moisture levels can be controlled in clay.

6. 6.

   During soil testing, it is found that granular soil near a river has too much water, which increases pore pressure. Discuss the potential risks this could pose for construction.

   Hint

   Reflect on how water affects soil stability.