A Cylinder Shear Apparatus
Corfdir, A
CERMES, ENPC/LCPC, Institut Navier, 6 et 8 avenue Blaise Pascal, Champs sur Marne, 77455 Marne-la-vallee, cedex 2, France

Lerat, P
LAMI, ENPC/LCPC, Institut Navier, 6 et 8 avenue Blaise Pascal, Champs sur Marne, 77455 Marne-la-vallee, cedex 2, France

Vardoulakis, I
N.T.U. Athens, 5, Heroes of Polytechnion avenue, 157 73 Athens, Greece

(Received 24 July 2002; accepted 26 February 2004)

Abstract
Studies of the interface between soil and an element of structure are actively carried out, considering the importance of the behavior of such interfaces in civil engineering applications such as deep foundations, retaining structures, and soil reinforcement. In the past a wide variety of different testing devices have been used, such as the modified direct or simple shear apparatus, pull-out devices, and annular shear apparatuses. Here a new shear device, the cylinder shear apparatus, is presented that has been designed to enhance our shear testing possibilities. This new shear device allows, as ring shear devices, significant shear displacements with an improved homogeneity of the interface. It allows also the control of the normal confining stress, stress control in a direction parallel to the interface, and visualization of the interface kinematics. The cylinder shear apparatus gives also the possibility of performing tests with natural granular material and/or with Schneebeli's rollers, with dry, saturated, drained and undrained samples and continuous pore fluid pressure monitoring.

Keywords:
friction ratio, granular material, Schneebeli's rollers, shear tests, soil, soil-structure interface, testing device, visualization

Paper ID: GTJ11551
DOI: 10.1520/GTJ11551

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Author Corfdir, A Affiliation CERMES, ENPC/LCPC, Institut Navier, 6 et 8 avenue Blaise Pascal, Champs sur Marne, 77455 Marne-la-vallee, cedex 2, France Author Lerat, P Affiliation LAMI, ENPC/LCPC, Institut Navier, 6 et 8 avenue Blaise Pascal, Champs sur Marne, 77455 Marne-la-vallee, cedex 2, France Author Vardoulakis, I Affiliation N.T.U. Athens, 5, Heroes of Polytechnion avenue, 157 73 Athens, Greece Author Corfdir A, Lerat P, Vardoulakis I Title A Cylinder Shear Apparatus Symposium , Committee on