According to Terzaghi's effective stress principle, the effective stress in a saturated soil equals:
Correct answer: C. Total stress minus pore water pressure
- A. Pore water pressure minus total stress
- B. Total stress plus pore water pressure
- C. Total stress minus pore water pressure
- D. Total stress divided by pore water pressure
Explanation
Effective stress is the portion of stress carried by the soil skeleton. Pore water pressure reduces the stress transmitted through grain contacts, so it is subtracted from total stress.
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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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