非饱和膨润土热-水-力耦合的数值模拟研究  

Numerical Investigations on Thermo-Hydro-Mechanical Properties of Unsaturated Bentonite

作　　者：毛亮[1] 黄淑龙 李洪辉[1] 贾梅兰[1] 吴文杰 Mao Liang;Huang Shulong;Li Honghui;Jia Meilan;Wu Wenjie(China Institute for Radiation Protection, Taiyuan 030006, China;School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China)

机构地区：[1]中国辐射防护研究院,山西太原030006 [2]东华理工大学核科学与工程学院,江西南昌330013

出　　处：《环境科学与管理》2021年第5期37-40,共4页Environmental Science and Management

基　　金：中国辐射防护研究院院基金(YJ18000402);中国辐射防护研究院院青年基金(YQ18000413)。

摘　　要：膨润土作为高放废物处置库缓冲材料的基材,其长期性能对处置库的安全至关重要。参考KBS-3V高放废物处置库概念设计,基于热-水-力耦合理论,采用COMSOL数值模拟软件,对高庙子非饱和膨润土在热-水-力三场耦合条件下的长期性能进行了数值模拟分析。分析结果表明在模拟条件下,膨润土温度在短时间内快速上升至最大值,之后温度随固化体释热率下降而降低,最高温度为82.2℃;钻孔内的膨润土未完全饱和,最大饱和度为0.91;膨润土所受应力随着离巷道距离缩短而上升,最大应力为3.13 MPa。Bentonite is the base material of buffer material for high-level radioactive waste disposal repository.The long-term performance of bentonite is very important for the safety of disposal repository.The long-term performance of the unsaturated GMZ bentonite was simulated by COMSOL based on the KBS-3V disposal model and the coupled thermo-hydro-mechanical processes.The results show that under the simulated conditions,the temperature of bentonite rises rapidly to the maximum in a short time,and then decreases with the decrease of the heat release rate of solidified body,and the maximum temperature of bentonite is 82.2℃.The bentonite in the borehole is not completely saturated with a maximum saturation of 0.91.The stress on bentonite increases with the decrease of distance from the roadway,and the maximum stress is 3.13 MPa.

关 键 词：非饱和膨润土 高放废物 热-水-力耦合 数值模拟 

分 类 号：X7[环境科学与工程—环境工程]