Civil Engineering MCQAE Level Civil Engineering
Under load, the void ratio of a submerged saturated clay decreases from 1.00 to 0.92. The consolidation settlement of a 2 m thick clay layer of the same type will be
Soil MechanicsSoil MechanicsMEDIUM
Choose the correct answer
A
20 mm
B
40 mm
C
80 mm
D
100 mm
Correct Answer
C. 80 mm
Why is this the answer?
Consolidation settlement: rho = H * (e0 - e1) / (1 + e0), where H = initial layer thickness, e0 = initial void ratio, e1 = final void ratio under applied stress. Also: rho = H * mv * delta_sigma (mv = coefficient of volume compressibility). One-dimensional consolidation theory (Terzaghi, 1925) governs settlement and time rate. Settlement = H(e0-e1)/(1+e0) = 80 mm.
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This MCQ belongs to WBPSC AE Previous Years Questions Series. Full tests include timed attempts, rank comparison and subject-wise analysis.