Practice Capillary Rise And Partial Saturation (1.3.3) - Stresses in the Ground

Practice: Capillary Rise and Partial Saturation

Lesson 1.3.3Stresses in the Ground

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6 sample questions

Question 1.
What is pore water pressure?
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Think about water pressure under different levels.
Question 2.
What does effective stress represent?
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Remember the formula: Effective Stress = Total Stress - Pore Water Pressure.
3Question 3.
What does the term pore water pressure refer to?
- Pressure in the soil due to external loading
- Pressure exerted by water in soil pores
- The pressure exerted by air in the soil
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Remember the role of water in soil mechanics.
4Question 4.
True or False: Effective stress is equal to total stress plus pore water pressure.
- True
- False
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Recall the effective stress formula.
Question 5.
A soil sample with a total stress of 200 kPa is partly saturated, with pore water pressure measured at 40 kPa. Calculate the effective stress and interpret its significance on bearing capacity.
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Apply Terzaghi's principle to find the effective stress.
Question 6.
Discuss how a drop in the water table due to drought conditions would affect the effective stress in surrounding soil layers.
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Consider the relationship between water levels and effective stress.

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