混合型缓冲回填材料模型试验研究  

Model Test of Mixed Buffer Backfill Material

作　　者：纪磊 李二兵 谭跃虎 许国东[1] 龚辉 吴兆 赵齐 潘越 卢辉 周宁 胡桂宝 JI Lei;LI Erbing;TAN Yuehu;XU Guodong;GONG Hui;WU Zhao;ZHAO Qi;PAN Yue;LU Hui;ZHOU Ning;HU Guibao(Jiangsu Construction Quality Inspection Center Co.,Ltd.,Nanjing 210033,China;PLA Army Engineering University,Nanjing 210000,China;Nanjing Qinhuai District Construction Project Quality Supervision Station,Nanjing 210000,China;Nanjing Jiangbei New District Construction and Traffic Engineering Quality safety Supervision Station,Nanjing 211500,China)

机构地区：[1]江苏省建筑工程质量检测中心有限公司,南京210033 [2]中国人民解放军陆军工程大学,南京210000 [3]南京市秦淮区建设工程质量监督站,南京210000 [4]南京市江北新区建设和交通工程质量安全监督站,南京211500

出　　处：《能源研究与管理》2020年第2期23-31,共9页Energy Research and Management

基　　金：全军后勤科研计划项目(BY114L004)。

摘　　要：为验证混合型缓冲回填材料在高放废物地质处置库中的传热效果,参照高放废物地质处置库概念图中各部的实际尺寸结合数值模拟所得处置库热源的影响范围设计了模型试验,选用导热、抗渗和强度均有明显优势的配合比进行了"直接压实法"和"堆砌法"2种模型试验,得到了2种砌筑方式下处置库模型的传热效果,探讨了回填材料在2种砌筑方式下的处置库模型的传热规律。观察对比2种砌筑方式的传热效果,可以发现:在中心热源的持续影响下,缓冲回填材料的含水率会发生变化,对其的导热系数和模型的整体性存在不同程度的影响;相比于"堆砌法","直接压实法"所得模型的内外收敛温度差更小,温度收敛也更加迅速。因此,建议处置库回填材料砌筑时,在保证缓冲回填材料的均匀性和工程质量的前提下应尽可能增大其尺寸,接缝处应尽量填充密实,减小空隙对缓冲回填材料导热特性和处置库密闭性的影响。To test the heat-transfer effect of the mixed buffer backfill material in the high-level radioactive waste geological repository,the model test was designed with reference to the actual size of each part of the high-level radioactive waste geological repository concept map combined with the numerical simulation of the repository heat source.The heat transfer,impermeability and strength have obvious advantages of the mix ratio of the"direct compaction method"and"stacking method"two model tests,get the heat transfer effect of the repository model under two masonry methods,discussed backfilling the heat transfer law of the repository model of the material under two masonry methods.Observing and comparing the heat transfer effects of the two masonry methods,it can be found that under the continuous influence of the central heat source,the moisture content of the buffer backfill material will change,which has different degrees of influence on its thermal conductivity and the integrity of the model;Compared with the"stacking method",the temperature difference between the internal and external convergence of the model obtained by the"direct compaction method"is smaller,and the temperature convergence is faster.Therefore,it is recommended that when the backfill material of the repository is built,the size of the buffer backfill material should be increased as much as possible on the premise of ensuring the uniformity of the buffer backfill material and the quality of the project.The joints should be filled as densely as possible to reduce the thermal conductivity of the gap to the buffer backfill material and the impact of the tightness of the repository.

关 键 词：高放废物地质处置库 混合型缓冲回填材料 导热性能 模型试验 

分 类 号：P579[天文地球—矿物学] TB321[天文地球—地质学]