Thank you sir for this great lecture.... Can we say Dilatency correction or water table correction as If there is water table then there will be -pore pressure means pore pressure will act against the N- value and thus increase the N-Value, and so correction is always deductive (reduced corrected N value)
@26:54 sir shearstrength formula s=c+sighma tan phi,so here sand so c=0 ok, after you consider the sighma value,what is that (sighma means total stress=effective stress- pore water pressure) we get -u so we consider in total stress formula + ,but your not considering the effective stress in the shear strength formulay, why ❓
its not a simple increase in volume lol, increase in volume induces -u, which increases effective pressure, that misrepresents N value, and that effect does not happen on foundations, thus the need for correction, its a lot more complicated than a simple increase in volume.
