【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。更多还原

【Abstract】 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.更多还原