Simple Solution for Triaxial Tests | Use This Formula to Obtain Soil Cohesion and Friction Angle

Drawing Mohr's circles for each triaxial test is a standard way to analyze experimental data from triaxial tests (watch this video to learn how to do it). However, there is another way that involves simple calculations. Watch this video to see how you can quickly do it without any drawings.
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[@yashnayak13]

THANK YOU SIR

[@ramakrishnagoud8420]

Good explanation

[@CTech_enlightement]

Thank you sir

[@Geegigi]

Thanks

[@Ian17000]

can you please show the workings of putting the angle of 27.8deg back into the equation solving for effective cohesion? Assuming if the answer is a negative then the cohesion is considered zero.

[@karthigasakthivel288]

In a series of triaxial test, if the deviator stress is independent of confining pressure, then what is the value of C and phi?

[@behzaddastjerdy6799]

Thank you so much. What if we have more than two tests like five test samples?? because with different sample, the value of Phi will be changed and in that case, which Phi can represent the most fitted value for the mohr envelope?

[@GeoEngineeringandScience]

Good comment, the more samples tested the more accurate results you can obtain. If you use the formula described in this video, then you can select two circles only. Still, drawing all tests is more reliable way to obtain soil strength. There is still a bit variation in the final answer, which is acceptable; at some point, you will need to exercise your engineering judgement.

[@abcerna8529]

This equation only applies to drained triaxial test?

[@duppalaraghuram4806]

Thia value draw for Mohrs circle

[@saydo1674]

what if it was three equations, then how you will apply the system of equ.

[@davidgriffin2770]

that only works if there is a solution, a way to work with n samples is the method that I have on my channel

[@saydo1674]

@@davidgriffin2770 thank you so much

[@fodesorysylla7239]

58.9° how did he found it please?

[@ramakrishnagoud8420]

Tan inverse (1.66)

[@loooooooooooooooooob]

goat

[@SosoMosweu]

sorry but i got lost at tan of 1.66

[@abcerna8529]

Square root of 2.77