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首页> 外文会议>GEO-DENVER 2007 >EXPERIM ENTAL EVIDENCES O N THERM O -HYDRO -M ECHANICAL CO UPLING IN ENG INEERED CLAY BARRIER FOR DEEP NUCLEAR WASTE DISPO SAL
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EXPERIM ENTAL EVIDENCES O N THERM O -HYDRO -M ECHANICAL CO UPLING IN ENG INEERED CLAY BARRIER FOR DEEP NUCLEAR WASTE DISPO SAL

机译：深层核废料分布的工程化粘土屏障中O-Hydro-M机械耦合的实验证据

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摘要

In the context of using engineered clay barrier in deep nuclear waste disposal, an experimental work was carried out to observe the behavior of compacted swelling clay under thermo-hydro-mechanical (THM) loading. Firstly, the measurement of thermal conductivity has allowed the elaboration of a theoretical model to estimate the thermal conductivity of unsaturated soils. After an evaluation study on the proposed model and three existing models found in the literature, it was concluded that the thermal conductivity of unsaturated soil could be correlated with only one parameter: the air volume fraction. Secondly, the water retention curve, that influences the water transfer in unsaturated soil, was determined at different temperatures. The results showed a decrease of water retention capacity due to heating. A simple model based on the interfacial tension air-water was formulated to simulate this effect. Finally, the soil volume change under complex THM loading was studied. Thermo-mechanical phenomena, which are often observed on saturated clay, were equally observed on the compacted unsaturated clay.
机译：在将工程粘土屏障用于深部核废料处理的背景下，进行了一项实验工作，以观察压实膨胀粘土在热-水-机械（THM）载荷下的行为。首先，热导率的测量允许建立一个理论模型来估计非饱和土壤的热导率。通过对建议的模型和文献中现有的三个模型进行评估研究，得出的结论是，非饱和土壤的导热系数仅与一个参数相关：风量分数。其次，在不同温度下确定了影响非饱和土壤水分传递的保水曲线。结果表明，由于加热，保水能力降低。建立了一个基于界面张力空气-水的简单模型来模拟这种效果。最后，研究了复合THM载荷下土壤体积的变化。通常在饱和黏土上观察到的热机械现象在压实的不饱和黏土上也同样观察到。

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