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eng.consolidation-oedometer Calculator
Calculates primary consolidation settlement from the oedometer (consolidation) test data — compression index, void ratio, and effective stress. The oedometer test gives Cc (compression index) and Cs (swelling index) — with pre-consolidation pressure, these determine settlement for any stress increment.
Inputs
E0
Reference formula or conversion factor shown for context.
Cc
Reference formula or conversion factor shown for context.
Sigma0 Kpa
Internal force per unit area (Pa or MPa). Must stay below yield strength in service.
Delta Sigma Kpa
Applied force or weight (N or kN). Divide into dead load (permanent) and live load (variable — people, wind, etc.).
H M
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
Results
primary consolidation settlement Sc (mm)
The value at the specified point or condition.
Sc = H·Cc/(1+e₀)·log₁₀((σ₀+Δσ)/σ₀)
Reference formula or conversion factor shown for context.
volume compressibility mv (m²/kN)
The computed three-dimensional volume.
stress ratio (σ₀+Δσ)/σ₀
Internal force per unit area (Pa or MPa). Must stay below yield strength in service. Beyond yield: permanent deformation. Beyond tensile strength: fracture.
Cc values
The computed numeric or monetary value.
secondary compression
The computed compression ratio or compressive force. Higher compression ratios store more energy but increase heat and pressure.