Practice Question: Consolidation Settlement for a Footing
NCEES Civil PE Specification III.B.: Soil Consolidation
Problem
A 6 ft by 40 ft spread footing is to be poured on saturated consolidated clay (over-consolidation ratio, OCR = 3) and will resist an applied load of 300 kips.
Given soil properties shown in the figure, determine the primary consolidation settlement of the clay layer after the footing is poured and loaded:
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CORRECT 😃
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24.4%
Solution
Answer: A) 0.64 in
Calculate the effective stress at the mid-depth of the soil layer: