Using Stress Path To Estimate Soil Strength | Step by Step Procedure to Find Cohesion and Friction

There are different methods to estimate the strength of soil from triaxial tests. We can either draw Mohr circles and failure envelope or use a stress path approach when we analyse the data in the p'-q' space. This video gives a step-by-step explanation how to use the stress path concept to obtain soil cohesion and friction angle.
More videos on soil strength:
Mohr-Coulomb Failure Analysis of Triaxial Tests • Mohr-Coulomb Failure A...
Triaxial Tests on Sand • Triaxial Tests on Sand...
How to Estimate Maximum Shear Stress that Soil Can Withstand • Maximum Shear Stress t...
How to Estimate Shear STRENGTH of soil using Shear Box Data • How to Estimate Shear ...
How to Estimate Pore Water Pressure in Undrained Triaxial Tests on Clay • How to Estimate Pore W...
Shear Box Test | Sample Preparation and Testing Procedure • Shear Box Test | Sampl...
If you find these videos useful, share them and subscribe to the channel. More details can be found in my book called Soil Mechanics Through Project-Based Learning.

[@bhunganelihle]

Thanks for the video.

[@alaqhaider8205]

Thank you very much

[@MEGeotechnical_Consultants]

Thanks for the video. I hear there is a difference between the s-t' space and p-q' space. My understating of s-t' space is computed the way you computed your p-q' space. do know why these two spaces are often calculated /defined interchangeably?

[@alaqhaider8205]

S t used for plane two dimensional and pq for three dimensional

[@Martin-iw1ll]

I understanding was that it was J-p' for three dimensional and q-p' for 2 dimensional

[@Martin-iw1ll]

S'-t' becomes the same as p'-q' when there is no cohesion for the soil material.

[@Martin-iw1ll]

Cause s' equals p'+c'/tan(thi')

[@Martin-iw1ll]

But different books define things differently, it really depends on how the author wants to do things