Practice First Part Of Effective Stress Principle (1.3.1) - Stresses in the Ground

Practice: First Part of Effective Stress Principle

Lesson 1.3.1Stresses in the Ground

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10 questions

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6 sample questions

Question 1.
What is the formula for total stress at a depth?
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Think about the factors influencing stress at a given depth.
Question 2.
What happens to pore water pressure below the water table?
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Remember the hydrostatic condition of water.
3Question 3.
What equation represents total stress in soil at a certain depth?
- σ = γZ
- σ' = σ - u
- u = γ_w h
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Remember the basic equation for total stress!
4Question 4.
True or False: The effective stress is directly measurable.
- True
- False
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Consider how we measure stress in soils.
Question 5.
Calculate the total stress at a depth of 15 feet with a soil unit weight of 120 lbs/ft³. What would happen if water were to saturate this soil to 10 feet?
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Make sure to account for both the weight of the soil and the contribution of the water above.
Question 6.
Explain how excavation to a depth of 20 feet might impact pore water pressure and total stress in a nearby area.
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Consider how soil reacts to sudden removal of load and its effects on water movement.

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