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SEALEX in-situ experiments-performance tests of repository seals: experimental observations and modelling

机译：Sea ex原位实验 - 储存库密封的性能测试：实验观察和建模

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The paper describes observations and numerical analysis of SEALEX performance tests installed in Tournemire Underground Research Laboratory (URL). One of the objectives of the large scale in-situ tests is to investigate the impact of technological gaps on the long term performance of bentonite based seals. The swelling cores consist of pre-compacted blocks of a natural sodic Wyoming bentonite (MX80 type) mixed with quartz sand in a ratio of 70/30 (in dry mass) with different geometries (monolithic disks or four jointed disks). Several technological gaps exist within the in situ tests: Gaps between the blocks and annular gap with variable width between the bentonite-based core and the host rock. All the tests are extensively instrumented for monitoring the main Hydro-Mechanical (HM) variables. Comparison of the experimental results showed that the presence of technological gaps constituted new hydration sources (annular gaps) and flow paths (gaps between the blocks) that changed the saturation kinetics. A coupled HM formulation that incorporates the relevant processes involved in the problem under consideration has been adopted to analyse the effect of the annular technological gap on dry density homogenization of the bentonite based core as hydration progresses. Technological gaps were demonstrated to have an impact on dry density distribution.
机译：本文介绍了在Tournemire地下研究实验室（URL）中安装的Sea lex性能测试的观测和数值分析。大规模原位测试的一个目标是研究技术间隙对基于膨润土密封的长期性能的影响。膨胀芯由与石英砂混合的天然殖民型膨润土（MX80型）的预压缩块组成，其比例为70/30（干块），具有不同几何形状（整体磁盘或四个关节盘）。在原位测试中存在若干技术差距：嵌段和环形间隙之间的间隙，基于膨润土的核心和主岩之间的可变宽度。所有测试都是广泛的仪器，用于监测主要的水力机械（HM）变量。实验结果的比较表明，技术间隙的存在构成了改变饱和动力学的新的水合源（环形间隙）和流动路径（块之间的间隙）。已经采用了一种耦合的HM制剂，其包括所考虑的问题所涉及的相关过程，以分析环形技术间隙对膨润土基核的干密度均质的影响，因为水合水合进展。证明了技术差距对干密度分布产生影响。

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