Mesure en place des coefficients de perméabilité et des coefficients de consolidation horizontaux et verticaux

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Abstract
A method for the in situ measurement of the horizontal and vertical coefficients of permeability and consolidation is presented in this paper.Following a brief review of the theories developed by Gibson for the constant and falling head tests, the results of the integration of the consolidation equations are given in the case of a cylindrical permeameter in an orthotropic soil. An experimental method for measuring kv, kh, cv, and ch is described. The main difficulties are related to the placement of the permeameter with the least possible disturbance of the soil and to the accurate measurement of the flow.The first problem has found a satisfactory solution by using the self-boring technique for the placement of the permeameters. The flow is measured with an automated unit, described in this paper, which allows for a rigorous stabilisation of the applied depression and a resolution of 10 mm3 in the measurement of the volumes. [Journal translation]

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