CU Triaxial and CD Triaxial - Effective Parameters
CU Triaxial and CD Triaxial - Effective Parameters
(OP)
I am trying to determine effective stress parameters for a foundation soil and have been
provided the following information (which is the only information available at present): The material is a slightly silty clay (CL); having a PI ~20 and moisture content of 20%.
Lab Test Phi (degrees) Cohesion (psf)
R (CU) 15.8 860
S (CD) 30.7 0
Do these values appear reasonable? What would one select for effective strength parameters if
this were the only information available?
provided the following information (which is the only information available at present): The material is a slightly silty clay (CL); having a PI ~20 and moisture content of 20%.
Lab Test Phi (degrees) Cohesion (psf)
R (CU) 15.8 860
S (CD) 30.7 0
Do these values appear reasonable? What would one select for effective strength parameters if
this were the only information available?
RE: CU Triaxial and CD Triaxial - Effective Parameters
As for what you use for design, it depends on what you are designing. You may need Q (UU) test results, you may need to use a combination of R & S results or just the S results may be suffient. All depends on what you are designing and the type of loading(s) it will see.
Mike Lambert