| 考虑细观等效热学参数的高放废物处置库围岩应力−渗流−温度耦合模拟方法 |
| |
| 引用本文： | 侯会明,胡大伟,周辉,卢景景,吕涛,张帆.考虑细观等效热学参数的高放废物处置库围岩应力−渗流−温度耦合模拟方法[J].岩土力学,2019,40(9):3625-3634. |
| |
| 作者姓名： | 侯会明 胡大伟 周辉 卢景景 吕涛 张帆 |
| |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学和工程国家重点实验室，湖北 武汉 430071；2. 中国科学院大学，北京 100049；
3. 中国核电工程有限公司，北京 100840；4. 湖北工业大学 土木建筑与环境学院，湖北 武汉 430064 |
| |
| 基金项目： | 国家重点研发计划资助（No.2018YFC0809601）；国家自然科学基金资助项目（No.51779252）；湖北省技术创新专项（重大项目）（No.2017AAA128）。 |
| |
| 摘 要： | 高放废物处置库中乏燃料持续释放的热量对围岩的应力场和渗流场及其长期稳定性具有重要影响。围岩的热学参数依赖于岩石矿物组成、孔隙率和孔隙流体等因素，准确取值是进行高放废物地质处置库多场耦合分析的前提。通过细观力学分析，建立了围岩等效热学参数（热容、热传导系数、热膨胀系数）取值方法，并基于Biot孔隙介质理论，建立应力?温度?渗流三场耦合模型，进而提出了高放废物处置库围岩应力?渗流?温度耦合数值模拟方法。最后通过COMSOL Multiphysics多场耦合软件，利用瑞士Mont Terri高放废物地下试验室围岩温度?渗流?应力多场耦合现场试验数据对数值模拟方法进行验证，并探讨了温度?渗流?应力耦合过程的演化规律。研究表明，模拟结果和试验值吻合良好。研究结果可为我国高放废物处置库的安全评估和选址提供科学依据。
|
| 关 键 词： | 多场耦合 高放废物 热学参数 细观力学 |
| 收稿时间： | 2018-06-21 |
Thermo-hydro-mechanical coupling simulation method of surrounding rock in high-level radioactive waste repository considering effective meso-thermal parameters |
| |
| HOU Hui-ming,HU Da-wei,ZHOU Hui,LU Jing-jing,LÜ Tao,ZHANG Fan.Thermo-hydro-mechanical coupling simulation method of surrounding rock in high-level radioactive waste repository considering effective meso-thermal parameters[J].Rock and Soil Mechanics,2019,40(9):3625-3634. |
| |
| Authors: | HOU Hui-ming HU Da-wei ZHOU Hui LU Jing-jing LÜ Tao ZHANG Fan |
| |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. China Nuclear Power Engineering Co., Ltd., Beijing 100840, China;
4. School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, Hubei 430064, China |
| |
| Abstract: | The sustained releasing heat of spent fuel has important impacts on the mechanical and seepage fields of the surrounding rock in high-level waste disposal repositories and its long-term stability. Generally, the thermal parameters of surrounding rock depend on the mineral composition, porosity and pore fluid of rock. To the multi-field coupling analysis of high-level radioactive waste geological repository, it is necessary to determine the values of thermal parameters accurately. Through the meso-mechanical analysis, the method was established to obtain the effective thermal parameters of the surrounding rock, including heat capacity, thermal conductivity coefficient, and thermal expansion coefficient. Based on Biot theory for porous media, a thermo- hydro-mechanical coupling model was built, and then its numerical simulation method of surrounding rock in the high-level radioactive waste repository was proposed. Finally, through the multi-field coupling software of COMSOL Multiphysics, the proposed numerical simulation method was verified using the in-situ test data of thermo-hydro-mechanical coupling in surrounding rock in the Mont Terri high-level waste underground laboratory in Switzerland. The simulation results agreed well with the experimental results. The evolution law of the thermo-hydro-mechanical coupling process was also discussed. The research results can provide a scientific basis for the safety assessment and site selection of high-level radioactive waste repository in China. |
| |
| Keywords: | multiphysics coupling high-level radioactive waste thermal parameters meso-mechanics |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
