放射性废物浅埋处置库顶盖试验研究  

EXPERIMENTAL RESEARCH ON TOP COVER OF SHALLOW-BURIED RADIOACTIVE WASTE DISPOSAL REPOSITORY

作　　者：虞修竟[1] 倪师军[1] 王永利[1] 蔡国军[1] 张东[2] 徐德敏[3] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]中国工程物理研究院二所,四川绵阳621900 [3]中国水电工程顾问集团公司成都勘测设计研究院,四川成都610072

出　　处：《岩石力学与工程学报》2009年第6期1169-1176,共8页Chinese Journal of Rock Mechanics and Engineering

摘　　要：顶盖是低中放废物近地表处置库的重要防护屏障,对放射性废物处置库的长期安全性起着重要作用。以一拟建放射性废物浅埋处置库为例,结合当地自然特征及地质条件,采用地质类比结合试验的途径来研究顶盖的功能和实用性。通过对顶盖表面植被层、隔水层的岩性分析,进行抗自然营力侵蚀,以及岩石力学性质、水理性质、渗透性能等方面的试验研究。试验结果表明,顶盖表面植被层采用天然的砂砾石层,隔水层采用黏土砾石层等可使顶盖结构简单、库容增加,且造价降低;还可使强度、稳定性和防护性能得到明显提高。The top cover is the important protection barrier for low-intermediate radioactive waste disposal repository near ground surface, and it will exert the important function for the long-term security of the disposal repository. Taking a proposed radioactive waste shallow-buried disposal repository as an example, combining with the local natural features and geological conditions, the issues of functionality and practicality of the top cover are discussed by the methods of geological analog and test. Based on analyzing the top cover of surface vegetation layer and aquifuge lithology characteristics, the experimental studies of anti-natural stresses corrosion and rock mechanical properties, water physical properties, and its permeability, etc. are carried out. The test results show that the natural sandy gravel can be used as the top cover surface vegetation layer： and the clay gravel can be used as the aquifuge layer, which can make the top cover structure simple, increase volumetric storage and reduce engineering cost. It can also significantly improve the strength, stability and the protection performance.

关 键 词：废物处置 低中放废物 处置库项盖 隔水层 黏土 砂砾石 

分 类 号：TL942.21[核科学技术—辐射防护及环境保护]