Correlation between SPT N value and CBR
Correlation between SPT N value and CBR
(OP)
Hi... Fellow Engineers.
I am woring on Australian project where about 90 Kms road and rail network is required to be designed. I have the preliminay geotechnical investigation data indicating field SPT N values at various locations. I need to know the CBR value that can be adopted for the preliminay design and estimation.
Please guide If any one has got the approach to evaluate CBR from SPT N vlaues.
I am woring on Australian project where about 90 Kms road and rail network is required to be designed. I have the preliminay geotechnical investigation data indicating field SPT N values at various locations. I need to know the CBR value that can be adopted for the preliminay design and estimation.
Please guide If any one has got the approach to evaluate CBR from SPT N vlaues.





RE: Correlation between SPT N value and CBR
RE: Correlation between SPT N value and CBR
Thanks for sharing the relationship, however it is not clear that the given CBR shall be considered as 4 days soak, 7 days soak or Unsoaked. The one which I required is 4 days soaked, can it be directly refer for determining subgrade thickness.