Abstract

The Meuse/Haute-Marne underground research laboratory was built in the Callovo–Oxfordian (COx) clay formation for the purpose of assessing the feasibility and safety of a deep geological formation to host an industrial radioactive waste repository (Cigéo project) in France. Some observations related to the drifts oriented in the direction of the major horizontal stress remain to be theoretically and numerically understood. In order to contribute to the understanding of the hydromechanical behaviour of the COx claystone, an elasto-viscoplastic model with transient creep was developed, including the inherent elastic and hydraulic anisotropies. Comparison with in situ measurements was made, with encouraging results.

摘要

Meuse/Haute-Marne 地下研究实验室建在 Callovo-Oxfordian (COx) 粘土地层中，目的是评估在法国建立工业放射性废物处置库（Cigéo 项目）的深层地质构造的可行性和安全性。与主要水平应力方向上的漂移相关的一些观察结果仍有待在理论上和数值上加以理解。为了有助于理解 COx 粘土岩的流体力学行为，开发了具有瞬态蠕变的弹粘塑性模型，包括固有弹性和水力各向异性。与现场测量进行了比较，结果令人鼓舞。