FireChch thank you for your answer. After all your answers i decided to do as you say. The building we are speaking is 12m x 22m
After we speak i did calculations like you told me and i am more conservative i guess so i get phi of 16 degrees(phi'=2/3phi) and
for c i took a very little value...
suhb PMT Thank you for your answer i am already using it for mv and su (Cu) and as FireChch told it's for undrained shear strength. I am looking for drained cohesion for long term bearing capacitcy.
In normal cases i would go with Φu=0 and Cu= Something (From that graph with Plasticity Index f1...
Thank you all for your answers. I knew that designing a footing for ultimate bearing capacity is Illogical.
I need approval of "city hall" and they have a form that suggests to calculate ultimate bearing capacity. That's why i needed "c" value for.
GeoEnvGuy thanks for that manual. Almost every...
Thank you for your answer fattdad. I am really sorry about my english in advance.
I know that they are not same thing. Sometimes there is no lab experiment for clay's cohesion. (To use in vesic's bearing capacity as follows:
In my country you cannot say to some people "Run some tests for clay"...
I have too many charts and tables for Undrained Shear Strength. I couldn't find any source for cohesion value for clays.
Is there any Direct correlation beetwen cu (Undrained Shear Strength) and c (Cohesion)or any information about cohesion table (or charts, graph... etc)
In my boring logs and...
If you have any further information about the "clay" like Plasticity Index and SPT-N values you can use Modulus of Volum Compressibility with:
consolidation s = coefficient of compressibility x average stress increase through layer x layer thickness
as maxim22 suggests.
(Note: Don't forget to...