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.

中文翻译：

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原位调查 Callovo-Oxfordian 粘土的 THM 行为

在设计地下放射性废物处置库时，尤其是在考虑设施的长期安全性时，主岩的热-水-力学行为至关重要。2000 年，法国国家放射性废物管理机构 (Andra) 开始在默兹上马恩省建造一个地下研究实验室，以开展一项研究计划，旨在证明在卡洛沃-牛津大学建造和运营放射性废物处置设施的可行性。粘土岩，并优化其实施。为了研究早期热相对深层储存库粘土基质的热-水-力学效应，Andra 进行了各种原位加热试验；其中之一被称为 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，并对 Callovo-Oxfordian 粘土岩的热-水-力学特性进行反分析。热导率和热容量值是基于原位测量的反向分析确定的，并与在样品上测量的值进行比较。原位实验数据和数值模型证实了粘土岩的各向异性行为。TED 实验结果证明了当前模型预测处理室远场温度和孔隙压力演变的能力。热导率和热容量值是基于原位测量的反向分析确定的，并与在样品上测量的值进行比较。原位实验数据和数值模型证实了粘土岩的各向异性行为。TED 实验结果证明了当前模型预测处理室远场温度和孔隙压力演变的能力。热导率和热容量值是基于原位测量的反向分析确定的，并与在样品上测量的值进行比较。原位实验数据和数值模型证实了粘土岩的各向异性行为。TED 实验结果证明了当前模型预测处理室远场温度和孔隙压力演变的能力。