The soil profile at a site is shown in Figure P2.13. The moist and saturated unit weights of the sand are 17.0 kN/m³ and 20.0 kN/m³, respectively. A soil specimen was taken from the middle of the clay layer and subjected to a consolidation test, and the following properties are reported:

Natural water content of the clay = 22.5%

Specific gravity of the soil grains = 2.72

Preconsolidation pressure = 110.0 kN/m²

Compression index = 0.52

Swelling index = 0.06

a. Is the clay normally consolidated or overconsolidated?

b. If a 2 m high compacted fill with a unit weight of 20.0 kN/m³ is placed on the ground, what would be the final consolidation settlement?

Figure P2.13.

Transcribed Image Text:

GL 2.0 m Sand 3.0 m 关 3.0 m Clay Bedrock