Practice Unloading And Expansion Curves (1.6) - Compression of Fine Grained Soil

Practice: Unloading and Expansion Curves

Lesson 1.6Compression of Fine Grained Soil

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9 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define void ratio.
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What does it tell us about the soil?
Question 2.
What happens to a soil sample when effective stress increases?
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Think about the effects of pressure.
3Question 3.
What does the virgin compression curve indicate?
- Low compression behavior
- High compression behavior
- No compression
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Think of how soils behave when subjected to considerable stress.
4Question 4.
True or False: When soil is unloaded, it always returns to its original state.
- True
- False
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Consider what happens during unloading processes.
Question 5.
A soil sample is subjected to a series of load increments for 24 hours each, eventually showing a permanent strain of 5%. If unloaded, estimate how much it would recover based on the expansion curve.
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Analyze the changes post-unloading to trace back to recovery.
Question 6.
Propose a scenario where rapid unloading would affect the soil structure and discuss potential design implications.
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Using the properties of permanent strain and effective stress, what could this lead to?

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