Settlement Under Foundations

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The approximate relationship between loads on foundations and settlement is

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

The coefficients C1 and C2 are usually determined by bearing plate loading tests.

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