In a consolidated undrained triaxial test with pore pressure measurement, the effective stress strength parameters are obtained by using:
Correct answer: A. Effective stresses only
- A. Effective stresses only
- B. Total stresses only
- C. Water content values only
- D. Dry density values only
Explanation
Pore pressure measurement allows the effective principal stresses to be calculated from the total stresses. The effective stress path can then be used to determine cohesion and friction angle. Water content and dry density alone do not define the effective stress failure envelope.
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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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