Practice Effective Stress Principle - 1.3 | 8. Stresses in the Ground | Geotechnical Engineering - Vol 1
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Knowledge

1.3 - Effective Stress Principle

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the formula for calculating total stress at a given depth?

💡 Hint: Think about the weight of the soil above.

Question 2

Easy

Define pore water pressure.

💡 Hint: Consider what happens in saturated soil conditions.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the formula for effective stress?

  • σ' = σ + u
  • σ' = σ - u
  • σ' = σ * u

💡 Hint: Recall the main equation of the Effective Stress Principle.

Question 2

The pore water pressure at the water table is:

  • True
  • False

💡 Hint: Think about the definition of the water table.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Given a soil layer with a total stress of 150 kPa and pore water pressure of 50 kPa, if the water table rises by 1 meter causing an additional 5 kPa of pore water pressure, what will the effective stress be after this increase?

💡 Hint: Don't forget to recompute pore water pressure after the water table rises.

Question 2

In practicing geotechnical exercises, a soil profile has an initial effective stress of 80 kPa. If a construction adds 40 kPa of load, calculate the changes in stress if the initial pore water pressure is 20 kPa. Additionally, explain why maintaining effective stress is essential during this operation.

💡 Hint: Look at effective stress's role when loads are applied to soil.

Challenge and get performance evaluation