Interpretation of coefficient of consolidation from CRS test results

Rui Jia , Jinchun Chai , Takenori Hino

Abstract

Constant rate of strain (CRS) consolidation tests were conducted for undisturbed Ariake clay samples from three boreholes in Saga Plain of Kyushu Island, Japan. The coefficients of consolidation (cv) were interpreted from the CRS test results by small- and large-strain theory. Large-strain theory was found to interpret smaller cv values and less strain rate effect on cv than that by small-strain theory. Comparing the theoretical strain distributions within a soil specimen to those obtained by numerical simulation shows that the small-strain theory can be used only for the dimensionless parameter (where  is strain rate and H0 is the specimen height), and the large-strain theory can be used for a larger range of strain rates. Applying the criterion to undisturbed Ariake clay with a cv value of about 1

Key Words

constant rate of strain (CRS); coefficient of consolidation; strain rate effect; large-strain theory

Address

Rui Jia, Takenori Hino — Institute of Lowland and Marine Research, Saga University, Saga, Japan
Jinchun Chai — Department of Civil Engineering and Architecture, Saga University, Saga, Japan

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