How can I model the change from undrained soil to drained soil in the long term?

This can be found in the Frew help manual under topic Method of Analysis-> Total and Effective Stress -> Undrained to Drained Behaviour  and Undrained to Drained Example. For automatic calculation of undrained pore pressures, specify a material from which to obtain effective stress parameters for each undrained material.  Or to effect a manual switch from undrained to drained behavior without using Frew to calculate the undrained pore pressures automatically refer to the help topic: Detailed Processes in Frew -> Undrained to drained behaviour � Manual Process

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