CEEN 641 - Lecture 17 - Computing Settlements and Introduction to the Janbu Tangent Modulus Approach

This video reviews the computation of primary consolidation settlement and its associated theory from the 1D consolidation test. An alternative, universal approach is presented called the Janbu tangent modulus approach. A demonstration to computing the preconsolidation pressure using the tangent modulus approach is shared.

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[@tariqsheikh1192]

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[@فيروزياسر-ب1ش]

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[@v.v.matveev]

Stress exponent j can be less than zero (j < 0). For normally consolidated extra sensitive Scandinavian clays (quick clays) j = -0.5, and some Canadian quick clays may be even as low as -0.7. (Holtz, Kovacs, Sheahan, 2011. p. 377)

[@mariogalindoq]

At 35:39 you hace a mistake in the delta e2 expression. The numerator inside the log is wrong. It should be sigma 0 + delta sigma - sigma_p. Please verify.

[@michaelmolter8828]

I’m m surprised that numerical integration of the consolidation curve isn’t the norm. More accurate than fitting a log curve over the plot and conceptually simpler.