Hi Wilf, You're getting some good discussion going here. The OC clay responses confirmed by John Powell. Following Gilliane's observations in soft clays, an alternative fresh approach to the dissipation analysis is that by Elsworth (e.g., Geotechnical Site Characterization, Vol. 2, Balkema, Rotterdam, 1409-1413) that uses dislocation theory and shows porewater responses increase then decrease. (also Elsworth, ASCE J. Geot. Eng. 119, No. 10, 1601-1623). Paul