What Is the One-Dimensional Consolidation Settlement Calculator?
Consolidation settlement represents the time-dependent volume reduction of saturated clay soils caused by drainage of pore water.
How Does the One-Dimensional Consolidation Settlement Calculator Work?
Compares total final effective stress to preconsolidation stress to classify OCR status.
Integrates volumetric strains along virgin compression and recompression curves.
One-Dimensional Consolidation Settlement Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
Sc = [Cc·H₀ / (1 + e₀)] · log₁₀((σ₀' + Δσ') / σ₀')
Terzaghi 1D primary consolidation settlement equation for normally consolidated clay.
How to Use the One-Dimensional Consolidation Settlement Calculator
- Input clay thickness H₀ and oedometer indices (e₀, Cc, Cr).
- Provide initial and induced foundation effective stresses at stratum mid-depth.
Step-by-Step Example Calculation
Normally Consolidated Clay Layer
Input Values:
clayThickness:4
voidRatio:0.8
compressionIndex:0.35
initialStress:100
stressIncrease:50
preconsolidationStress:100
recompressionIndex:0.05
Worked Steps: Normally consolidated 4m clay layer subjected to 50 kPa foundation stress increment.
Understanding Your Result
Primary result indicates total primary consolidation settlement in millimeters.
Summary displays consolidation state (NC vs OC) and OCR ratio.
Factors That Affect the Result
- Compression index Cc.
- Overconsolidation ratio (OCR).
When Should You Use This Calculator?
- Foundation design on soft clay formations, embankments, and reclaimed land.
Assumptions & Limitations
- Assumes one-dimensional vertical strain and vertical pore water flow.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Standard Terzaghi 1D consolidation theory.