Apr 9, 2015 · The modulus of subgrade reaction is a basis for structural engineers to evaluate deformation from point loads that may or may not be applied to the slab. Say, you know a …

Jul 28, 2005 · Also, K=N(sub h)*depth, so N(sub h) has units of Force/Length^3. Technically, N(sub H) is the "constant of modulus of horizontal subgrade reaction" or the "coefficient of …

Mar 16, 2005 · The subgrade modulus is frequently specified in terms of pounds per cubic inch or kips per cubic inch. For a footing on the ground (say on sand) we frequently quote an …

Aug 10, 2009 · After computing the stimated elastic settlements (using sigma - W) (project is located on a weathered limestone), I computed the subgrade modulus. Subgrade modulus K = …

Nov 17, 2006 · So if you have 200 lbs/cu. inch soil subgrade modulus, and your spring governs an area of 1 sf, then your spring would be 200 lbs/cu. inch x (1 sf)(144 cu. inch/cu. foot) = 200 lb/ft …

Jun 15, 2010 · O.K. I'll jump in. . . I have a basic problem "compacting" a natural soil subgrade. In the absence of geotechnical data, you may find that the natural soil is pretty strong (i.e., suited …

May 10, 2008 · I am designing a 30-foot deep by 8 foot diameter reinforced concrete caisson. The value that I need is the horizontal subgrade modulus for the rock in order to determine what …

Apr 10, 2003 · With a recent (2019 ~ 2020) update to design standards, the methods of testing the CBR of the subgrade for highway design was removed, with designs now to be based on the …

Dec 23, 2007 · If we have soft to firm clay, the 100 pci value is a default. However, if we start getting into very stiff clays it is near 150 pci and in granular soils, the range of vertical …

Sep 18, 2023 · My understanding is the subgrade modulus, determined from the 1 ft plate test, isn't really appropriate for use in Mat foundation design. The formulas proposed in most …