In a saturated clay during primary consolidation, the decrease in excess pore-water pressure is accompanied by:
Correct answer: D. An increase in effective stress
- A. An increase in soil particle volume
- B. A decrease in effective stress
- C. A constant total stress increase
- D. An increase in effective stress
Explanation
Under constant total stress, dissipation of excess pore pressure causes effective stress to increase. This increase transfers load to the soil skeleton and produces consolidation settlement. The soil particle volume itself is treated as essentially incompressible.
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About Soil Mechanics and Foundations
Soil mechanics examines index properties, phase relationships, classification, permeability, seepage, compaction, consolidation, shear strength and earth pressure. Foundations apply these principles to bearing capacity, settlement and shallow or deep foundation selection, with clear distinction between compaction, which expels air, and consolidation, which expels water over time.
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