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What is the effective stress principle in soil mechanics?

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Question: What is the effective stress principle in soil mechanics?

Options:

  1. Total stress minus pore water pressure
  2. Total stress plus pore water pressure
  3. Pore water pressure minus effective stress
  4. Effective stress plus soil weight

Correct Answer: Total stress minus pore water pressure

Solution: 

The effective stress principle states that effective stress is equal to total stress minus pore water pressure.

What is the effective stress principle in soil mechanics?

Practice Questions

Q1
What is the effective stress principle in soil mechanics?
  1. Total stress minus pore water pressure
  2. Total stress plus pore water pressure
  3. Pore water pressure minus effective stress
  4. Effective stress plus soil weight

Questions & Step-by-Step Solutions

What is the effective stress principle in soil mechanics?
  • Step 1: Understand that soil is made up of solid particles and water.
  • Step 2: Know that total stress is the weight of everything above a point in the soil.
  • Step 3: Recognize that pore water pressure is the pressure of water in the spaces between soil particles.
  • Step 4: Learn that effective stress is what helps soil hold together and support structures.
  • Step 5: Remember the formula: Effective Stress = Total Stress - Pore Water Pressure.
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