A soil strata can be described as6 meters of sand underlain by 4 meters of clay with the water table located at 7 meters from the bottom of the said strata. The sand has a dry and saturated unit weight of 14 kn/m3 and 18 kn/m3 respectively. On the other hand pertinent clay properties are saturated unit weight of 19 kn/m3, void ratio of 0.8 and liquid limit of 40. If a rectangular dimension 2.5m by 3.5m supporting a load of 900kN is supported at a depth of 1.5m below the soil, at what depth will the total stress be 250kPa. Utilize 2-1 approximation to address this problem.

A soil strata can be described as6 meters of sand underlain by 4 meters of clay with the water table located at 7 meters from the bottom of the said strata. The sand has a dry and saturated unit weight of 14 kn/m3 and 18 kn/m3 respectively. On the other hand pertinent clay properties are saturated unit weight of 19 kn/m3, void ratio of 0.8 and liquid limit of 40. If a rectangular dimension 2.5m by 3.5m supporting a load of 900kN is supported at a depth of 1.5m below the soil, at what depth will the total stress be 250kPa. Utilize 2-1 approximation to address this problem.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.8P

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The top 500m of a site consists of a clayey sand with a void ratio of 0.90 and a water content of 20.0%. The specific gravity of the soil grains is 2.68. When the ground is compacted at the same water content, there is 45mm reduction in the thickness of this layer. Determine the new void ratio and the unit weight of the soil. I keep seeing answers with 0.5m or 500mm instead of 500m as depth. Im just confused
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