What is the Settlement Under Foundations?

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To calculate the approximate value of settlement the following equations is used. This establishes a relationship between loads on foundations and settlement

q/P = C₁(1+2d/b) + C₂/b
where
q = load intensity, lb/ft² (kg/m²)
P= settlement, in (mm)
d =depth of foundation below ground surface, ft (m)
b=width of foundation, ft (m)
C₁ =coefficient dependent on internal friction
C₂ = coefficient dependent on cohesion

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