^^^ The SPT test can be used to determine bearing capacity but there is more information needed to determine the appropriateness of the SPT data towards your specific design need.
A really big question is whether or not we are discussing a shallow foundation or a deep foundation. Then there are some deviations depending on the heterogeneity of the underlying strata and contemplation of the material - mostly sands, clays, or silts?
So, what I am getting at - it takes more information and some judgement based on the end result of the data (e.g. purpose of the numbers relative to design) in order to say good idea or not.
If you have a more specific question, please feel free to post or PM me. I am not a bearing capacity guru but I can certainly pass along to others who are more informed than myself.
JR
Could someone elaborate on this? How do you apply the n-value when estimating bearing pressure? What if you have a stiff clay(cohesive material) with a shallow mat foundation and water table below the influence line?
Thanks for answering.This is for a road that will have minimal traffic for 32,000 lbs truck. It is mostly limerock. We need to determine if the subbase has the capacity to hold that type of vehicle. Right now there is 6' of subbase. Based on the test results we got, it seems fine, but of course the company needs numbers and formulas and such..... any help is greatly appreciated.
Thanks.
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