1.6 - Unloading and Expansion Curves
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Practice Questions
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Define void ratio.
💡 Hint: What does it tell us about the soil?
What happens to a soil sample when effective stress increases?
💡 Hint: Think about the effects of pressure.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the virgin compression curve indicate?
💡 Hint: Think of how soils behave when subjected to considerable stress.
True or False: When soil is unloaded, it always returns to its original state.
💡 Hint: Consider what happens during unloading processes.
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Challenge Problems
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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.
💡 Hint: Analyze the changes post-unloading to trace back to recovery.
Propose a scenario where rapid unloading would affect the soil structure and discuss potential design implications.
💡 Hint: Using the properties of permanent strain and effective stress, what could this lead to?
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