9.4.3 - Effective stress equation
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Practice Questions
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What is the formula for effective stress?
💡 Hint: Remember it involves total stress and pore pressure.
Define quick sand condition.
💡 Hint: Think about how upward water flow affects soil.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does effective stress indicate in soil mechanics?
💡 Hint: Think about the stress that affects the structural integrity of soil.
True or False: A rise in groundwater level always increases effective stress.
💡 Hint: Reflect on how water pressure interacts with total stress.
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Challenge Problems
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A construction site has a clay layer with a total stress of 40 kPa above a sand layer. When the groundwater table rises, the pore water pressure increases to 20 kPa. Evaluate how this affects the effective stress.
💡 Hint: Consider what happens to the effective stress when pore water pressure changes.
In a detailed analysis of soil stability, if soil at a depth of 15 m has a total stress of 50 kPa and pore water pressure is measured at 15 kPa, calculate the effective stress. Discuss the engineering implications.
💡 Hint: Refer to the definitions of total and effective stress in your calculations.
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