Total Cohesion
The FHWA GEC 010 method allows the adhesion coefficient α to be calculated according to the total cohesion cu determined by the laboratory triaxial CIUC test.
If the total cohesion is determined by a different type of test (UC,UU), it is corrected before calculation based on the following relationships (Chen and Kulhawy 1993):
- For cu according to the UC test:
- For cu according to the UU test:
where: | cu(CIUC) | - | total cohesion determined by the laboratory triaxial CIUC test |
cu(UC) | - | total cohesion determined by the laboratory triaxial UC test | |
cu(UU) | - | total cohesion determined by the laboratory triaxial UU test | |
σef | - | effective stress |