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What does the term 'effective stress' refer to in soil mechanics?

Practice Questions

Q1
What does the term 'effective stress' refer to in soil mechanics?
  1. Total stress minus pore water pressure
  2. Pore water pressure minus total stress
  3. Soil weight divided by volume
  4. Soil density multiplied by gravity

Questions & Step-by-Step Solutions

What does the term 'effective stress' refer to in soil mechanics?
  • Step 1: Understand that soil is made up of solid particles and water.
  • Step 2: Recognize that when weight is applied to soil, it creates total stress.
  • Step 3: Know that pore water pressure is the pressure of water in the spaces between soil particles.
  • Step 4: Realize that effective stress is what actually holds the soil particles together and supports loads.
  • Step 5: Calculate effective stress by subtracting the pore water pressure from the total stress.
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