Constrained Soil Modulus Ms

[muuddfun]

Do any of you know how to calculate the constrained soil modulus Ms directly from the CPT tip stress Qc for clay soils? I have some charts for sand, but I need to calculate it for CH clay?

I need this for the rehabilitation of a very old pipeline.

 

[mudman54]

constrained modulus/qc=alpha
alpha is an empirical coefficient
be carefull because all the correlations are made to different varieties of cone geometry and procedures