Settlement & Consolidation

Consolidation Settlement Calculator (1D)

Calculate primary consolidation settlement for normally consolidated (NC) and overconsolidated (OC) soils, secondary compression (Cα), and analytical pore pressure isochrones.

ASTM D2435Terzaghi

Inputs

Demo

1. Stratum Geometry & Stress State

Clay Thickness H (m)

Initial Overburden σ'₀ (kPa)

Preconsolidation σ'p (kPa)

Stress Increase Δσ' (kPa)

2. Soil Compressibility & Time Rate

Initial Void Ratio e₀

Compression Index Cc

Recompression Index Cr

Coeff. of Consolidation Cv (m²/yr)

Drainage Boundary Condition

Calculate Secondary Compression (Creep)

Results

Enter clay stratum parameters above, or click a Demo Preset at the top to compute 1D consolidation settlement.

Theory and formulae

1D Consolidation Governing Formulae

About this calculator

This free 1d consolidation calculator runs entirely in your browser: what you enter is never uploaded. Switch between metric and imperial units at any time. Use the calculation steps and the theory section to check the working, and print a calculation sheet with the inputs, results and formulae for your records.

Methods and references: ASTM D2435, Terzaghi.

Topics: consolidation, settlement, overconsolidation, compression index, secondary compression, isochrones, time rate.

Engineering notice: Results are for preliminary estimation, screening and education. All inputs and outputs must be independently verified by a qualified professional engineer before use in any design or construction decision. Read the full disclaimer