The soil profile at a site consists of 2 m of sand underlain by 6 m of clay, which is underlain by very stiff clay that can be assumed to be impervious and incompressible. The water table lies 1.5 m below the ground level. The soil properties are as follows: Sand: gsat 5 18.5 kN/m3 , gm 5 17.0 kN/m3 Clay: e0 5 0.810, gsat 5 19.0 kN/m3 , cv 5 4.5 m2 /year When the ground is surcharged with 3 m-high compacted fill with a bulk unit weight of 19 kN/m3 , the settlement was 160 mm in the first year. a. What would be the settlement in two years? b. After one year since the fill was placed, what would be the pore water pressure and the effective stress at the middle of the clay layer? c. If the clay is normally consolidated, estimate the compression index and the coefficient of volume compressibilit
. The soil profile at a site consists of 2 m of sand underlain by 6 m of clay, which is underlain
by very stiff clay that can be assumed to be impervious and incompressible. The water table
lies 1.5 m below the ground level. The soil properties are as follows:
Sand: gsat 5 18.5 kN/m3
, gm 5 17.0 kN/m3
Clay: e0 5 0.810, gsat 5 19.0 kN/m3
, cv 5 4.5 m2
/year
When the ground is surcharged with 3 m-high compacted fill with a bulk unit weight of 19
kN/m3
, the settlement was 160 mm in the first year.
a. What would be the settlement in two years?
b. After one year since the fill was placed, what would be the pore water pressure and
the effective stress at the middle of the clay layer?
c. If the clay is normally consolidated, estimate the compression index and the coefficient of volume compressibilit
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