Soil Mechanics and Foundation Engineering - Engineering

Q1:

If σ0' and σ' represent initial and increased pressure ; e0 and e void ratios corresponding to initial and increased pressure ; and C0 the compression index (dimensionless), then, the virgin compression curve as expressed by Terzaghi empirical formula is

A e = e0 + Cc log10 σ'/σ0'

B e = e0 - Cc log10 σ'/σ0'

C e0 = e - Cc log10 σ'/σ0'

D e0 = e + Cc log10 σ0'/σ'

ANS:B - e = e0 - Cc log10 σ'/σ0'

Cc= (e0-e)/log10(σ'/σ0).
e0= e + log10(σ'/σ0).

So, the answer is (B).