For a partially saturated soil, Δu the increase in pore water pressure, when no drainage is permitted, is expressed as (where A and B are Skempton's pore pressure parameters and Δσ1 and Δσ3 are major and minor principal stress increments)

Δu = A[Δσ3 + B(Δσ1 - Δσ3)]

Δu = B[Δσ3 + A(Δσ1 - Δσ3)]

Δu = Δσ3 + A(Δσ1 - Δσ3)]

Δu = Δσ3 + B(Δσ1 - Δσ3)]

For a partially saturated soil, Δu the increase in pore water pressur

1.	For a partially saturated soil, Δu the increase in pore water pressure, when no drainage is permitted, is expressed as (where A and B are Skempton's pore pressure parameters and Δσ1 and Δσ3 are major and minor principal stress increments)
A.	Δu = B[Δσ3 + A(Δσ1 - Δσ3)]
B.	Δu = A[Δσ3 + B(Δσ1 - Δσ3)]
C.	Δu = Δσ3 + A(Δσ1 - Δσ3)]
D.	Δu = Δσ3 + B(Δσ1 - Δσ3)]
Answer» B. Δu = A[Δσ3 + B(Δσ1 - Δσ3)]

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For a partially saturated soil, Δu the increase in pore water pressure, when no drainage is permitted, is expressed as (where A and B are Skempton's pore pressure parameters and Δσ1 and Δσ3 are major and minor principal stress increments)

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