Skip to main content

Causes of preconsolidation

Short answer

Preconsolidation is caused by erosion or removal of overlying soil, melting of glaciers, desiccation, lowering and later rise of water table, removal of structures, and secondary compression, aging, cementation, or tectonic effects.

What are the different causes of preconsolidation of soil?

A soil is preconsolidated when it has once carried a greater effective stress than at present. The causes are:

  1. Erosion or removal of overlying soil layers.
  2. Melting of glaciers/ice sheets which once loaded the soil.
  3. Desiccation (drying) of the upper soil layer, which causes capillary stress, followed by re-wetting.
  4. Lowering and later rise of the water table, or fluctuations of the ground water level.
  5. Removal of buildings or other structures (past loading and unloading).
  6. Secondary compression, aging and cementation (chemical effects), and tectonic effects.

✓ Answer checked by Claude Opus 5.5 (high effort)

Related questions

All Soil Mechanics chapter 9 questions →