Poroelastic behaviour of a water-saturated limestone |
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| Authors: | Mikaël Ramos da Silva Christian Schroeder Jean-Claude Verbrugge |
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| Affiliation: | 1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, China;2. ENGIE EPI, 1 Place Samuel de Champlain, 92930 La Défense Cedex, France;3. Laboratoire de Mécanique de Lille (LML) CNRS FRE 3723, Centrale Lille, CS 20048, F-59651 Villeneuve D′Ascq Cedex, France;4. ENPC, Institut Navier, 6 & 8 avenue Blaise Pascal, 77455 Marne-la-Vallée, France;1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;2. Institute of Geotechnical Engineering, Hohai University, Nanjing, Jiangsu 210098, China;3. Laboratory of Multiscale and Multiphysics Mechanics, University of Lille, CNRS FRE 2016, LaMcube, Lille 59000, France |
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| Abstract: | This paper presents the results of an experimental study carried out on a porous, water-saturated limestone. First, a set of poroelastic parameters is obtained from a wide range of experiments (drained, undrained, pore pressure loading and unjacketed tests) conducted on the same sample at the same stress state. A “null” test, inspired from unsaturated soil testing, is added to confirm the previous results, in particular the value of the Biot coefficient. Then, the variation of the measured parameters between samples is investigated. Finally, the influence of the stress state is studied in the framework of semilinear poroelasticity. Several expressions are compared to model the evolution of the drained bulk modulus as a function of Terzaghi's effective stress. |
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