Community Research and Development Information Service - CORDIS

  • European Commission
  • CORDIS
  • Publications
  • Development of Hydro-mechanical Models of the Callovo-Oxfordian Argillites for the Geological Disposal of Radioactive Waste (MODEX-REP), Final report, EUR 20844
FP5

Development of Hydro-mechanical Models of the Callovo-Oxfordian Argillites for the Geological Disposal of Radioactive Waste (MODEX-REP), Final report, EUR 20844

Project ID: FIKW-CT-2000-00029
Funded under: FP5-EAECTP C

Abstract

The MODEX-REP project aimed at building and validating suitable constitutive models and numerical tools for the Callovo-Oxfordian argillites investigated by Andra as a potential host rock located at a depth of 500 m in eastern France. Constitutive models are basic tools for assessing the short- and long-term mechanical behaviour of the rock mass in which waste disposal cells are excavated. During the shaft-sinking operations which lasted from 2000 to 2005 at the Meuse/Haute-Marne Underground Research Laboratory (MHM URL) built by Andra, a set of hydro-mechanical instruments recorded the response of the argillites during an in-situ experiment known as the REP experiment.
The MODEX-REP project consisted in:
(i) developing constitutive models by analysing laboratory test results on argillite samples;
(ii) forecasting the response of the rock mass to shaft-sinking operations - the REP experiment;
(iii) analysing the results of in-situ measurements obtained in the REP experiment;
(iv) comparing the forecasted and measured responses of the rock mass; and
(v) validating the models.
For elaborating the constitutive models for the argillites, Andra managed a database of more than 1000 mechanical and thermo-hydro-mechanical coupling tests on argillites samples. Each research team analysed the mechanical and hydro-mechanical behaviour of the rock at sample scale and characterised the main features of the investigated rock: deformability, strength, desiccation effects, creep, swelling and shrinkage. Meanwhile, an important laboratory test programme was carried out by GRS on the argillites samples collected in the REP experiment level from the borehole EST205 that had been drilled in the axis of the auxiliary shaft.

Download application/pdf (2212156)

Record Number: 8523 / Last updated on: 2007-05-29
Category: PROJ