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Effective Stress

Introduction
Stress profile applet
Expand/Collapse Item Total stress
  • In a homogeneous soil mass
  • In a soil mass below a river or lake
  • In a multi-layered soil mass
  • In a soil mass which is unsaturated
  • In a soil mass with a surface surcharge load
    • Expand/Collapse Item Pore pressure
  • Groundwater and hydrostatic pressure
  • Water table, phreatic surface
  • Negative pore pressure (suction)
  • Pore water and pore air pressure
    • Expand/Collapse Item Effective stress
  • Terzaghi's principle and equation
  • Mohr circles for total and effective stress
  • Importance of effective stress
  • Changes in effective stress
    • Expand/Collapse Item Drainage and volume change
  • Volume compressibility under load
  • Drainage under load
  • Permeability and time
  • Volume change under constant effective stress
    • Expand/Collapse Item Drained and undrained loading
  • Drained loading conditions
  • Undrained loading conditions
  • Consolidation
  • Rates of loading and seepage
    • Loading simulation
    Expand/Collapse Item Calculating vertical stress
  • Simple total and effective stresses
  • Effect of changing water table
  • Stresses under foundations
  • Short-term and long-term stresses
  • Steady-state seepage conditions

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