Question
Download Solution PDFThe effective stress strength parameters of soil are c'= 10 kPa and φ = 30o, then shear strength on a plane within the saturated soil mass at a point where total normal stress is 300 KPa and pore water pressure is 150 KPa, will be ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Terzaghi established that the normal stresses which control the shear strength of the soil are effective stresses. Therefore, the shear strength of the soil can be written as
Shear strength, \(S\; = \;c' + \bar\sigma \;tan\phi '\)
where c' = cohesion intercept in terms of effective stress
\(\phi'\) = the angle of shearing resistance in terms of effective stress
\(\bar\sigma = \) effective normal stress
Given:
c' = 10 kPa
φ = 30o
\(\sigma = \) 300 kPa
u = 150 kPa
Calculations:
\(\bar\sigma = \) \(\sigma -u=300-150=150\) kPa
S = 10 + (150) x tan30o
= 96.6 KPa
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