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GEO5

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Analysis Using the Compression Constant

Equation to compute compression of an ith soil layer below foundation having a thickness h arises from the definition of compression constant C:

where:

σor,i

-

vertical component of original geostatic stress in the middle of ith layer

σz,i

-

vertical component of incremental stress (e.g. stress due to structure surcharge) inducing layer compression

hi

-

thickness of the ith layer

Ci

-

compression constant in the ith layer

The program allows for inputting either the compression constant Ci or the compression constant C10 (the program itself carries out the transformation).