Question

A saturated clay stratum draining both at the top and bottom undergoes 50 percent consolidation in 16 years under an applied load. if an additional drainage layer were present at the middle of the clay stratum, 50 percent consolidation would occur in 2 years 4 years 8 years 15 years

Answer 1

rhfkggjtsirwuredgvtitu5ylktejutstjs

Answer 2

Answer:

4 yrs

Explanation:

U%=50%

t=60yrs

H=H/2 (both top and bottom)

since,

Tv=pai/4*(%U/100)^2

Tv=.1963

We know that

Tv=Cv*t/(H^2)

0.1963=Cv*16/(H/2)^2

Cv/H=3.067×10^-3 ---------(1)

case 2

H=H/4

Tv=Cv×t/(H^2)

.1963=(Cv/(H/4)^2)t

.0122=Cv/(H^2)*t---------(2)

put eq1 in eq2

t=4 yrs