Development of a New Hollow Cylinder Triaxial Apparatus for the Study of Expansion Tests in Clay
Silvestri, V
Department of Civil, Geological, and Mining Engineering, Ecole Polytechnique

Diab, R
Pinto Engineering, Inc., York, PA

Ducharme, A
Soil Mechanics Laboratory, Department of Civil, Geological, and Mining Engineering, Ecole Polytechnique

(Received 27 May 2003; accepted 27 September 2004)

Abstract
This paper presents the use of a new, automated, Hollow Cylinder Triaxial cell (HCTA) for the study of expansion tests in saturated clay. The hollow cylinder cell was developed by modifying a hydraulic triaxial cell, and was adapted to perform cylindrical cavity expansion tests in annular soil specimens, with measurement of excess pore water pressures generated at various radial distances. The apparatus allows one to perform drained and undrained expansion tests, under plane strain or constant axial stress, with the expansion process being either stress-controlled or strain-controlled. The equipment, testing procedures, and analysis of typical undrained expansion tests are discussed.

Keywords:
Clay, cylindrical cavity, hollow cylinder, pressuremeter, saturated clay, stress-strain curves, total and effective stress paths, undrained cavity expansion

Paper ID: GTJ11968
DOI: 10.1520/GTJ11968

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Author Silvestri, V Affiliation Department of Civil, Geological, and Mining Engineering, Ecole Polytechnique Author Diab, R Affiliation Pinto Engineering, Inc., York, PA Author Ducharme, A Affiliation Soil Mechanics Laboratory, Department of Civil, Geological, and Mining Engineering, Ecole Polytechnique Author Silvestri V, Diab R, Ducharme A Title Development of a New Hollow Cylinder Triaxial Apparatus for the Study of Expansion Tests in Clay Symposium , Committee on