Effect of Time on Soil Behavior

Different sediments exhibit varying amounts of time-dependent deformations and stress variation with time. The effect can result in either an increase or a decrease in shear strength (S J compared to the behavior at a standard strain loading rate (e) of 1% per hour. 

Pelagic clay central pacific (Richards and Chaney, 1981) 

Blake-Bahama outer ridge (Silva and Hollister, 1979) 

Pelagic clay DSDP site 576A (Geotechnical Consortium, 1984) 

Typical clay strength profiles. (From Chaney, R., and Fang, H.Y., Static and dynamic properties of marine sediments A state of the art. In Marine Geotechnology and Nearshore/Offshore Structures. STP 923, Chaney, R.C., and Fang, H.Y., eds., ASTM Press, Philadelphia, PA, pp. 74-111,1986. Reprinted with permission Copyright ASTM.) 

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