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首页> 外文期刊>Australian Geomechanics >HYDRAULIC CALCULATION OF CLAY-BASED BACKFILL AND PLUG FOR THE INTERSECTIONS OF TUNNELS IN THE GEOLOGICAL REPOSITORY FOR HLW
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HYDRAULIC CALCULATION OF CLAY-BASED BACKFILL AND PLUG FOR THE INTERSECTIONS OF TUNNELS IN THE GEOLOGICAL REPOSITORY FOR HLW

机译：HLW地质填埋场隧道穿越的黏土回填与桩的液压计算。

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摘要

A geological repository for vitrified high-level radioactive waste (HLW) has a range of different types of tunnels with different geometries depending on function: transport and emplacement of engineered barrier materials and waste packages, or access to underground facilities etc. At points where tunnels intersect, a complex arrangement of closure components will be placed to ensure long-term isolation performance of a disposal system. It is a key issue to identify requirements for the design of the materials and layout of these components, including clay-based backfill and plug. In this study, three-dimensional simulations of groundwater flow are conducted to investigate the sealing performance of clay-based backfill and plug at the tunnel intersection for given hydraulic conditions around the tunnels. In the analytical results, it is found that the direction of hydraulic gradient, hydraulic conductivities of concrete and backfilling materials and the position of clay plug had impact on flow condition around the engineered barrier system (EBS).
机译：用于玻璃化高放射性废物（HLW）的地质仓库具有一系列不同类型的隧道，这些隧道具有不同的几何形状，具体取决于功能：运输和安置工程隔离材料和废物包，或进入地下设施等。相交时，将放置复杂的封闭组件，以确保处置系统的长期隔离性能。确定这些组件的材料设计和布局（包括基于粘土的回填和塞子）的要求是关键问题。在这项研究中，对地下水流进行了三维模拟，以研究在隧道周围给定的水力条件下，基于粘土的回填和塞子在隧道相交处的密封性能。在分析结果中，发现水力梯度的方向，混凝土和回填材料的水力传导率以及黏土塞的位置对工程屏障系统（EBS）周围的流动条件产生了影响。

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