I'll write the values below, since I can't open the pdf text that I've posted.
Reference: Al-Hussaini, M. M., and Johnson, L. D. (1978)
Soil type: sand fill
Parameter values used:
K = 580, n = 0.50, Rf = 0.85, ? = 36?, c= 0.0, ? = 0.30
Reference: Andrawes, et al. (1982)
Soil type...
Hi,
in addition I send you paper, where you could find what are the rough values that are used for the soil materials. I suggest you to make several triaxial tests for the materials before you adopt any value for the parameters.
Cheers...