Volex Labs / Calculations / Consolidation settlement analysis (Terzaghi 1-D).

Consolidation settlement analysis (Terzaghi 1-D).

Enter the layer thickness, compressibility and the applied stress increase, and Volex Anvil computes the primary consolidation settlement from the void-ratio / stress relationship, the time-rate of settlement from the coefficient of consolidation cv, and the secondary (creep) settlement.

The one-dimensional Terzaghi theory follows Craig's 'Soil Mechanics', so the primary and secondary settlements match the standard textbook results for clay layers.

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What Volex Anvil checks

Validated against the published example

Clay layer settlement — primary and secondary components Terzaghi 1-D consolidation; Craig 'Soil Mechanics' §7.5
QuantityPublishedVolex AnvilError
Primary settlement Sc88.0 mm88.0 mm0.00%
Secondary settlement Ss28.3 mm28.3 mm0.00%
This case is one of 359 published checks the platform passes — the full table, with every source and every error, is public at volexlabs.com/verification.

Frequently asked

Normally or over-consolidated?
Both — the compression uses Cc above the preconsolidation pressure and Cr below it, from the OCR you enter.
Does it give the time-rate?
Yes — the degree of consolidation versus time is computed from the time factor Tv and the coefficient cv, so you get settlement at any elapsed time.
Is it validated?
The primary and secondary settlements are checked against Craig — within 0.00%.
Free to use?
Yes — 10 calculations a month free; Pro (£29/month) adds unlimited runs and PDF calc sheets.

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