If the condition is "undrained", you input the C' and ph', the program use this "C'" as Cu and ph' as 0 for the program calculation. If it is consolidation(drained), the ph' you input should be the real one, of course larger than "undrained" condition. ;ND)h pD+
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If you use "Drained" condition, you should use all effective stress parameters for your analysis. =Z~ nzyaN
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Help some help!