Question: A building will include a 1 0 ft by 1 0 ft square footing that will be located 2 ft below the existing ground surface.

A building will include a 10 ft by 10 ft square footing that will be located 2 ft below the existing ground surface. The expected load is 800,000lbs. The results of the subsurface investigation revealed the presence of an 8 ft thick sand layer overlying a 4 ft thick clay layer as shown in the figure below. The groundwater level is at a depth of 4 ft below the ground surface within the sand. Impermeable rock is present below the clay layer. Laboratory test results are also shown in the figure.
Impermeable Rock
A building will include a 1 0 ft by 1 0 ft square

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