Example 3ii

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   Example 3i
   Example 3ii
   Example 4

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Example 3ii The effective normal and shear stresses on the slip surface calculated in example 3i are the consolidation stresses for the rapid drawdown analysis. The ratio of the shear stress and the normal stress at consolidation, commonly called the

ratio, is constant for all slices and in this case equals 0.29. This

ratio is equivalent to an anisotropic consolidation ratio, or K_c ratio, of 1.85 in CU triaxial tests. Using data from 2 series of CU triaxial tests we can obtain the appropriate undrained shear strengths as a function of the effective normal stress at consolidation and the

or K_c ratio as shown below.

Immediately after drawdown, the stability analysis is carried out using total unit weights and water pressures.

Slip Surface

The analysis uses total stress shear strength parameters c =_ff (from the shear stress/normal stress curve above) = 0, and u = 0.

Loads

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