1.4. Identifying Point S

Try these first

1. 1.

   What is the purpose of plotting dial readings against the square root of time?

   Hint

   Think about how plotting helps understand relationships.

2. 2.

   What does point S represent on the consolidation curve?

   Hint

   What did we draw to find point S?

3. 3.

   What is the first step in identifying point S?

   • Draw tangent PQ
   • Plot dial readings
   • Draw line PR

   Hint

   Consider what data we need first.

4. 4.

   True or False: The drainage path length affects the time required for consolidation.

   • True
   • False

   Hint

   Think back to the proportional relationships discussed.

5. 5.

   Analyze a set of consolidation data to calculate point S using provided dial readings and drainage path specifications. Consider different scenarios of drainage lengths.

   Hint

   Don’t forget to check the tangent effects on your identification!

6. 6.

   Given various soil samples with differing drainage path lengths, predict their consolidation rates and discuss how line PR’s slope might change based on this data.

   Hint

   Think critically about the implications of differing paths.