A compacted fill is to be placed over the soil profile shown. The height and unit weight of the fill are
2mand
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)=4mand
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))=0.7and preconsolidation pressure
(\sigma _(c)^('))=140kPa. Take the clay layer as one single layer and calculate the total consolidation settlement. If point
Ais
4mbelow 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)