Question
Download Solution PDFThe ratio Nc/Nq for a purely cohesive soil is ________.
(Nc and Nq are Terzaghi bearing capacity factors)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
The ultimate bearing capacity of any soil is given as
qu = CNc + qNq + ½ BγNγ
Effect of type of soil:
- For purely cohesive soil (Clay)
- ϕ = 0 and C > 0
- Hence, Nc = 5.7, Nq = 1 and Nγ = 0Therefore the Ratio Nc/Nq = 5.7
Equation of bearing capacity for cohesive soil reduced to, Q = 5.7C + q
Additional Information
- For a Non-cohesive soil(sand), C = 0 and ϕ > 0°
- Equation of bearing capacity for Non-cohesive soil reduced to,
- qu = qNq + ½ BγNγ
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