Relationship between N value and phi in deep foundation
Relationship between N value and phi in deep foundation
(OP)
I am looking for if there exists any relationship between no of blows N and phi.As we have between N and Cohesion.
Thanks
Reston
Thanks
Reston





RE: Relationship between N value and phi in deep foundation
Reston
RE: Relationship between N value and phi in deep foundation
Suggest you use relations correlating phi for cohesive soils and PI presented as Figure 3-4 in USACE EM 1110-2-2504.
Jeff
RE: Relationship between N value and phi in deep foundation
RE: Relationship between N value and phi in deep foundation
Suggest you convert your SPT N values to N60 values for use with Bowles' correlations per PSlem's reference.
Jeff
RE: Relationship between N value and phi in deep foundation
Oops - just noticed that PSlem's reference shows correlation for non-cohesive soils, so it won't be direclty applicable to silty clay or clay soils.
Jeff
RE: Relationship between N value and phi in deep foundation
RE: Relationship between N value and phi in deep foundation
Reston