Thermo-mechanical effect on the drained creep behavior of a clay rock
文献类型：期刊论文
| 作者 | Yu, Hongdan2; Chen, Weizhong2; Ma, Yongshang2; Gong, Zhe1; Lu, Haifeng3 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2023-12-20 |
| 卷号 | 327页码:10 |
| 关键词 | Clay rock Experiment Creep behavior Temperature Mechanical effect |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2023.107327 |
| 英文摘要 | The heat released by high-level nuclear waste can cause a significant increase in temperature within the host rock, thereby affecting the long-term performance of a clay-based nuclear waste repository. This study aims to investigate the effects of stress and temperature on the creep behavior of a representative clay rock through a series of experimental creep tests. The tests were conducted under complex thermo-mechanical conditions using a temperature-controlled triaxial testing system. Drained creep tests were performed under various mechanical conditions, including a heating-cooling cycle (40 degrees C-* 60 degrees C-* 80 degrees C-* 60 degrees C-* 40 degrees C), with each temperature being maintained for approximately one month. The findings indicate the possible existence of a creep threshold stress even at high temperatures, although the temperature may extend the primary creep stage. Beyond the creep threshold stress, experiments conducted at high temperatures (or low confining pressure) exhibited significantly greater creep deformation and higher creep rates compared to those observed at room temperature (or high confining pressure) during the heating stage. Negligible creep deformation during cooling and the irrecoverable creep deformation resulting from deviatoric stress variation during the creep process demonstrate the path-dependent nature of the creep behavior of clay rock under thermo-mechanical conditions. Finally, the microscopic perspective of the creep mechanism in clay rock under thermo-mechanical effects was discussed, including the rearrangement and combination of clay particles, differential thermoelastic expansion among minerals, and the presence of pore water. |
| 资助项目 | National Natural Science Foundation of China[42377179] ; National Natural Science Foundation of China[51979266] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001102541500001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39947]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Yu, Hongdan; Chen, Weizhong |
| 作者单位 | 1.Wuhan Municipal Engn Design & Res Inst, Wuhan, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Wuhan Univ, Sch Civil & Architectural Engn, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Hongdan,Chen, Weizhong,Ma, Yongshang,et al. Thermo-mechanical effect on the drained creep behavior of a clay rock[J]. ENGINEERING GEOLOGY,2023,327:10. |
| APA | Yu, Hongdan,Chen, Weizhong,Ma, Yongshang,Gong, Zhe,&Lu, Haifeng.(2023).Thermo-mechanical effect on the drained creep behavior of a clay rock.ENGINEERING GEOLOGY,327,10. |
| MLA | Yu, Hongdan,et al."Thermo-mechanical effect on the drained creep behavior of a clay rock".ENGINEERING GEOLOGY 327(2023):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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