Settlement Calculation (Consolidation)

Ref: MS EN 1997-1, Terzaghi 1D Consolidation Theory

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Sc = (Cc·H)/(1+e₀) × log₁₀((σ₀'+Δσ)/σ₀')

Ref: MS EN 1997-1, Terzaghi 1D Consolidation Theory

Sc = (Cs·H)/(1+e₀)·log(σp'/σ₀') + (Cc·H)/(1+e₀)·log(σf'/σp')

t = Tv·Hdr²/Cv (Tv₅₀ = 0.197, Tv₉₀ = 0.848)

Soil Properties

Compression Index (Cc)

From oedometer test. Typical: 0.1–1.0

Swelling Index (Cs)

≈ Cc/5 to Cc/10

Initial Void Ratio (e₀)

Typical 0.5–2.0

Layer Thickness (m)

Compressible layer thickness

Stress Parameters

Initial Effective Stress (σ₀') (kPa)

At mid-layer

Stress Increase (Δσ) (kPa)

From foundation load

Preconsolidation Pressure (σp') (kPa)

From oedometer Casagrande

Consolidation

Coefficient of Consolidation (m²/year)

From oedometer test

Drainage Path Length (m)

H/2 for double drainage, H for single

OCR

—

Engineering aid only — final design must be endorsed by a registered PE under BEM.

Total Settlement (Sc)

—mm

Engineering aid only — final design must be endorsed by a registered PE under BEM.

t50

—years

Engineering aid only — final design must be endorsed by a registered PE under BEM.

Disclaimer: This output is an engineering calculation aid only and does not constitute a final or endorsed design. All designs submitted to Malaysian authorities must be endorsed by a registered Professional Engineer (PE) under the Board of Engineers Malaysia (BEM) in accordance with the Registration of Engineers Act 1967.