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An experimental study was carried out on undisturbed cored samples of Tunis soft soil extracted at 17.25 m depth. Three series of oedometer tests were performed: the first one comprised a standard test on Tunis soft soil, the second one was an oedometer test performed on the same soil improved by a prefabricated vertical drain Mebradrain 88 type. The third series comprised similar tests to those of series two during which vertical drainage was prevented. The assessment of Carillo’s theory is studied by quantifying the effect of radial and vertical consolidation from the observed global degree of consolidation of improved Tunis soft soil specimens by geodrains. The rate in decrease of coefficient cr is greater than that recorded for coefficient cv. The rate in increase of kr is greater than that recorded for kv. Using the Carillo’s theory a lower degree of consolidation which starts from 10% is obtained, however when using measurements of in series 3 simple approximate methods, higher degrees of consolidation starting from 70% are obtained.

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The experimental setup is the for reconstitution of soft clay.

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This page is a summary of: 3D Consolidation of Tunis Soft Clay Improved by Geodrains, Geotechnical Testing Journal, February 2017, ASTM International,
DOI: 10.1520/gtj20160067.
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