A coupled hydro-mechanical creep damage model for clayey rock and its application to nuclear waste repository
文献类型：期刊论文
| 作者 | Jia, S. P.2,3; Zhang, L. W.3; Wu, B. S.1; Yu, H. D.2; Shu, J. X.3 |
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
 |
| 出版日期 | 2018 |
| 卷号 | 74页码:230-246 |
| 关键词 | Clayey rock Permeability evolution Damage Hydro-mechanical coupling Self-healing |
| ISSN号 | 0886-7798 |
| DOI | 10.1016/j.tust.2018.01.026 |
| 英文摘要 | In this paper we propose a new nonlinear elasto-viscoplastic damage model, based on a modified Mohr-Coulomb criterion, to study the creep and seepage in clayey rock during construction of a high-level radioactive waste repository through laboratory experiments and field tests. First, three types of damage evolution equations are constructed by using the relationship between the damage variable and the strain. Then, a self-healing model is investigated for the clayey rock by considering the damage, confining pressure, pore water, and duration of saturated state. By introducing the damage, permeability evolution and self-healing as the key factors, a fully coupled hydro-mechanical model for clayey rock is developed with the commercial software ABAQUS. The hydro-mechanical behaviour in the surrounding rock is simulated with the proposed model considering the actual construction of the repository. The numerical results show that the construction quality has a significant effect on the stability of the rock formation, and that the extent of the horizontal gallery disturbed by shield tunnelling is less than that of the test drift disturbed by using jackhammers method. The creep damage of the surrounding rock increases rapidly at the early stage and tends to stabilize gradually after 15 years, and the damage in the middle part of the surrounding rock is larger than that in the bottom and top parts. In addition, due to the self-healing effect of clayey rock, around three years later, the permeability of the excavation disturbed zone (EDZ) is close to that of the original clayey rock with an order of magnitude 10(-19) m(2). The present model can also be used to predict the long-term stability of tunnels. |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000427668100021 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4249]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.CSIRO Energy, Melbourne 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 3.Yangtze Univ, Res Ctr Geomech & Geotech Engn; |
| 推荐引用方式 GB/T 7714 | Jia, S. P.,Zhang, L. W.,Wu, B. S.,et al. A coupled hydro-mechanical creep damage model for clayey rock and its application to nuclear waste repository[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2018,74:230-246. |
| APA | Jia, S. P.,Zhang, L. W.,Wu, B. S.,Yu, H. D.,&Shu, J. X..(2018).A coupled hydro-mechanical creep damage model for clayey rock and its application to nuclear waste repository.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,74,230-246. |
| MLA | Jia, S. P.,et al."A coupled hydro-mechanical creep damage model for clayey rock and its application to nuclear waste repository".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 74(2018):230-246. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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