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corelation of Subgrade modulus and bearing capacity.

corelation of Subgrade modulus and bearing capacity.

corelation of Subgrade modulus and bearing capacity.

(OP)
is there any corelation of bearing capacity and subgrade modulus. if the bearing capacity is 2 ksf, then can we deduce subgrade modulus from this value ?

RE: corelation of Subgrade modulus and bearing capacity.

(OP)
thanks a lot SlideRuleEra very usefull link.

RE: corelation of Subgrade modulus and bearing capacity.

According to Joseph E. Bowels,

Modulus of Sub-grade Reaction = S.F. x 40 x Bear. Cap.

Usually S.F. = 2.0

His book "Foundation Analysis and Design" is a useful guide in designing foundations. You'll have to consider two values (one higher and other lower) for the spring constant.

Clefcon

RE: corelation of Subgrade modulus and bearing capacity.

Contact the project geotech or a geotech and ask him/her.  Subgrade modulus has to do with soil displacement as well.  If you have so much displacement under a certain bearing pressure, that correlates to the subgrade modulus for that condition.

RE: corelation of Subgrade modulus and bearing capacity.

Also, subgrade modulus is tested based on a standard size plate bearing. If the size of the footing is significantly larger than the size of the plate, the modulus needs correction.

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