缓冲材料砌块不同组合形式长期性能演化研究  

Long-term Performance Evolution of Buffer Material Blocks in Different Combination Forms

作　　者：高玉峰[1,2,3] 刘月妙 曹胜飞[1,2] 李涛 郑维翰[4] GAO Yufeng;LIU Yuemiao;CAO Shengfei;LI Tao;ZHENG Weihan(Beijing Research Institute of Uranium Geology,Beijing 100029,China;CAEA Innovation Center for Geological Disposal of High-Level Radioactiie Waste,Beijing 100029,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou,Zhejiang 310058;School of Civil Engineering,Beijing Juuttong University,Beijing 100044,China)

机构地区：[1]核工业北京地质研究院,北京100029 [2]国家原子能机构高放废物地质处置创新中心,北京100029 [3]浙江大学建筑工程学院,浙江杭州310058 [4]北京交通大学土木建筑工程学院,北京100044

出　　处：《水利与建筑工程学报》2023年第1期61-67,81,共8页Journal of Water Resources and Architectural Engineering

基　　金：核设施退役治理专项资助科研项目(科工二司[2020]194号);国家原子能机构高放废物地质处置创新中心基金资助项目(CXJJ2110-04)。

摘　　要：高水平放射性废物地质处置库中缓冲层由缓冲材料砌块堆砌组成,层内不同类型的砌块接缝导致砌块存在不同的组合形式。采用LAGAMINE软件,对缓冲材料砌块6种不同组合形式进行计算,分析了不同组合形式的温度、饱和度和膨胀力随时间的变化规律。缓冲材料温度在开始10年内均低于100℃,之后明显降低,到100年时均低于35℃,1 000年时废物罐释放的热量基本可以忽略不计;砌块内接缝数量越多,完全饱和用时就越短,水化1 350天后,所有砌块组合形式内部均完全饱和;随着径向接缝增加,缓冲材料饱和越快,外环接缝附近优先出现膨胀力极大值;砌块中的径向和环向接缝使膨胀力最大值明显下降,且径向接缝的影响大于环向接缝,2 000年后,缓冲材料膨胀力趋于稳定。The buffer layer in the geological disposal repository of high-level radioactive waste is composed of buffer material blocks. Different types of block joints in the layer lead to different combination forms of blocks. LAGAMINE software was used to calculate six different combination forms of buffer material blocks and analyze the change rule of temperature, saturation and expansion force of different combination forms with time. The temperature of the buffer material was below 100℃ in the first 10 years, and then decreased significantly to below 35℃ in 100 years, and the heat released by the waste tank was basically negligible in 1 000 years. The more joints in the block, the shorter the time of full saturation. After 1 350 days of hydration, all the block combinations are fully saturated. With the increase of radial joints, the saturation of buffer material is faster, and the maximum value of expansion force appears preferentially near the outer ring joints. The radial and circumferential joints in the blocks significantly reduce the maximum expansion force, and the influence of radial joints is greater than that of circumferential joints. After 2 000 years, the expansion force of buffer material tends to be stable.

关 键 词：高放废物 缓冲材料 砌块 组合形式 长期性能 

分 类 号：TL942[核科学技术—辐射防护及环境保护] TU443[建筑科学—岩土工程]