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(Solved): A compacted fill is to be placed over the soil profile shown. The height and unit weight of the fil ...



A compacted fill is to be placed over the soil profile shown. The height and unit weight of the fill are

2m

and

18.5k(N)/(m^(3))

respectively. The fine-coarse sand layer has

Y_(dry)=16.5k(N)/(m^(3)),Y_(sat )=17.5k(N)/(m^(3))

, relative density

(D_(r))=80%

whereas

H_(1)=4m

and

H_(2)=3m

. The clay layer has

Y_(dry )=17k(N)/(m^(3)),Y_(sat )=18k(N)/(m^(3))

whereas

H_(3)=5m

, compression index

(C_(c))=0.6

, swell index

(C_(r))=0.09

, initial void ratio

(e_(0))=0.7

and preconsolidation pressure

(\sigma _(c)^('))=140kPa

. Take the clay layer as one single layer and calculate the total consolidation settlement. If point

A

is

4m

below the upper boundary of the clay layer, calculate the excess, hydrostatic and total pore water pressures at point A, 4500 days after the placement of the compacted fill as the consolidation coefficient

(C_(v))

is

0.086(m^(2))/()

day and there is also another sand layer beneath the clay layer. (4pts)



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