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Subgrade Reaction Modulus

Subgrade Reaction Modulus

Subgrade Reaction Modulus

How do you calculate the subgrade reaction modulus of a soil? I need to check some old design calcs by hand and do not know what value I should use for kh. I do have the general soil parameters and the results of a Brom computer analysis.  But these results do not include details of the lateral pile displacements and so I cannot use the relationship between pressure and displacement (p-y). Any ideas?

RE: Subgrade Reaction Modulus

There have been several threads related to this subject.  Many of them, it seems, have been fairly recent too.  Try doing a search or just look through the titles to find some.  It is important to understand that the subgrade modulus (or moduli as the case may be) is definitely not a property of the soil, but rather is dependent on a variety of site and project specific items.

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