The soil profile at a site consists of 2 m of sand at the groundlevel, underlain by 6 m of clay, followed by a very stiff claystratum that can be assumed to be impervious and incompressible.The water table is at 1.5 m below the ground level. Themoist and saturated unit weights of the sand are 17.0 kN/m3and 18.5 kN/m3, respectively. The clay has an initial void ratioof 0.810, saturated unit weight of 19.0 kN/m3, and coefficientof consolidation of 0.0014 cm2/s.a. When the ground is surcharged with 3 m high compactedfill with moist unit weight of 19.0 kN/m3, the settlementwas 160 mm in the first year. What would be the consolidationsettlement in the first two years?b. If the clay is normally consolidated, what is the compressionindex of the clay?
The soil profile at a site consists of 2 m of sand at the ground
level, underlain by 6 m of clay, followed by a very stiff clay
stratum that can be assumed to be impervious and incompressible.
The water table is at 1.5 m below the ground level. The
moist and saturated unit weights of the sand are 17.0 kN/m3
and 18.5 kN/m3, respectively. The clay has an initial void ratio
of 0.810, saturated unit weight of 19.0 kN/m3, and coefficient
of consolidation of 0.0014 cm2/s.
a. When the ground is surcharged with 3 m high compacted
fill with moist unit weight of 19.0 kN/m3, the settlement
was 160 mm in the first year. What would be the consolidation
settlement in the first two years?
b. If the clay is normally consolidated, what is the compression
index of the clay?
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