Experimental Bench for Study of Settling-Consolidation Soil Formation
Alexis, A
Laboratoire de Genie Civil de Nantes Saint-Nazaire, IUT de Saint-Nazaire, Saint Nazaire, France

Le bras, G
Laboratoire de Genie Civil de Nantes Saint-Nazaire, IUT de Saint-Nazaire, Saint Nazaire, France

Thomas, P
Laboratoire de Genie Civil de Nantes Saint-Nazaire, IUT de Saint-Nazaire, Saint Nazaire, France

(Received 30 July 2002; accepted 5 April 2004)

Abstract
A laboratory experimental bench suiting the evolution survey of little concentrated materials in the course of deposition is presented here. The materials concerned can be in formation soils (mud) or any other fine granular materials, however, all characterized by their strong deformability and by their complex behaviour with constant changes from settling to consolidation phases. First, the already available experimental devices are summed up in a state-of-the-art section. The restraints imposed by the material (properties, consistency, quick evolution) have directed the development towards automated settings consisting of a column containing the material studied, a gammadensitometer and a pressure sensor. The device proposed here, the experimental procedures and the result post-processing are described in detail to provide an accurate follow up of the densities and of the interstitial excess pore pressures. The most original feature of the device lies in the possibility to obtain profiles within the first minutes of the evolution. The results, presented here in terms of effective stress and pore pressure, make it possible to delimit the range of validity of the usually adopted constitutive laws better.

Keywords:
consolidation, gammadensitometer, mud, pore pressure, sedimentation, soil, soils

Paper ID: GTJ11582
DOI: 10.1520/GTJ11582

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Author Alexis, A Affiliation Laboratoire de Genie Civil de Nantes Saint-Nazaire, IUT de Saint-Nazaire, Saint Nazaire, France Author Le bras, G Affiliation Laboratoire de Genie Civil de Nantes Saint-Nazaire, IUT de Saint-Nazaire, Saint Nazaire, France Author Thomas, P Affiliation Laboratoire de Genie Civil de Nantes Saint-Nazaire, IUT de Saint-Nazaire, Saint Nazaire, France Author Alexis A, Le bras G, Thomas P Title Experimental Bench for Study of Settling-Consolidation Soil Formation Symposium , Committee on