In Situ Investigation of the THM Behavior of the Callovo-Oxfordian Claystone
In Situ Investigation of the THM Behavior of the Callovo-Oxfordian Claystone
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DOI：
10.1007/s00603-020-02073-8
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发表时间：
2020-03
影响因子：
6.2
通讯作者：
N. Conil;M. Vitel;C. Plúa;M. Vu;D. Seyedi;G. Armand
中科院分区：
文献类型：
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作者：
N. Conil;M. Vitel;C. Plúa;M. Vu;D. Seyedi;G. Armand
在设计放射性废物地下处置库时，特别是在考虑设施的长期安全性时，围岩的热-水-力学行为是必不可少的。2000年，法国国家放射性废物管理局（Andra）开始在默兹上马恩建造一个地下研究实验室，以开展一项研究计划，旨在证明在卡洛夫-牛津粘土岩中建造和运营放射性废物处置设施的可行性，并优化其实施。为了研究早期热阶段对深部储存库粘土宿主岩石的热-水-力学效应，Andra进行了各种原位加热试验;其中一项被称为TED实验。TED实验的目的是测量几个加热器周围的温度和孔隙压力场的演变，并反分析的Calovo-Oxfordian粘土岩的热-水-力学性能。导热系数和热容量值的基础上确定的反分析的原位测量和样品上测量的那些进行比较。现场实验数据和数值模型证实了粘土岩的各向异性特性。TED实验结果表明，目前的模型预测的温度和孔隙压力的演变在远场的处置细胞的能力。
The thermo-hydro-mechanical behavior of the host rock is essential while designing an underground radioactive waste disposal repository, and in particular, while considering the long-term safety of the facility. In 2000, the French National Radioactive Waste Management Agency (Andra) started constructing an underground research laboratory located in the Meuse Haute Marne to carry out a research program aiming to demonstrate the feasibility of constructing and operating a radioactive waste disposal facility in the Callovo-Oxfordian claystone, and to optimize its implementation. To study the thermo-hydro-mechanical effects of the early thermal phase on the clay host rock of a deep repository, Andra has performed various in situ heating tests; one of them is called the TED experiment. The aim of the TED experiment was to measure the evolution of the temperature and pore pressure fields around several heaters and to back-analyze the thermo-hydro-mechanical properties of the Callovo-Oxfordian claystone. Thermal conductivity and heat capacity values were determined based on the back-analysis of the in situ measurements and compared to those measured on samples. The in situ experimental data and numerical model confirm the anisotropic behavior of the claystone. The TED experiment results demonstrate the ability of current models to predict the evolution of temperature and pore pressure in the far field of disposal cells.