1.8. Reloading Curves and Hysteresis Loop

Try these first

1. 1.

   Define void ratio in your own words.

   Hint

   Think about how soil is made up of both solids and spaces.

2. 2.

   What happens to void ratio as effective stress increases?

   Hint

   Consider how load impacts the soil structure.

3. 3.

   The virgin compression line is represented by which path on the graph?

   • AB
   • BC
   • CD

   Hint

   Think about where significant compression begins.

4. 4.

   True or False: The reloading curve lies below the unloading curve.

   • True
   • False

   Hint

   Recall what happens during reloading.

5. 5.

   Given a soil sample's initial void ratio is 0.8, with an effective stress of 50kPa. If the sample undergoes virgin compression to an effective stress of 90kPa, calculate the new void ratio assuming a linear relationship.

   Hint

   You will need to determine the change based on effective stress increases.

6. 6.

   Discuss how knowledge of hysteresis in soil can influence the design of a foundation for a high-rise building.

   Hint

   Consider safety and stability in engineering design.