Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths
文献类型：期刊论文
| 作者 | Gu, Liangjie1; Feng, Xia-Ting1 ; Kong, Rui1; Yang, Chengxiang1; Xia, Yuelin2
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| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 16期号:4页码:1113-1126 |
| 关键词 | Triaxial cyclic loading and unloading test Stress path Deformation modulus and elastic deformation increment ratios Fracture degree Cohesion and internal friction angle |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.09.005 |
| 英文摘要 | Surrounding rocks at different locations are generally subjected to different stress paths during the process of deep hard rock excavation. In this study, to reveal the mechanical parameters of deep surrounding rock under different stress paths, a new cyclic loading and unloading test method for controlled true triaxial loading and unloading and principal stress direction interchange was proposed, and the evolution of mechanical parameters of Shuangjiangkou granite under different stress paths was studied, including the deformation modulus, elastic deformation increment ratios, fracture degree, cohesion and internal friction angle. Additionally, stress path coefficient was defined to characterize different stress paths, and the functional relationships among the stress path coefficient, rock fracture degree difference coefficient, cohesion and internal friction angle were obtained. The results show that during the true triaxial cyclic loading and unloading process, the deformation modulus and cohesion gradually decrease, while the internal friction angle gradually increases with increasing equivalent crack strain. The stress path coefficient is exponentially related to the rock fracture degree difference coefficient. As the stress path coefficient increases, the degrees of cohesion weakening and internal friction angle strengthening decrease linearly. During cyclic loading and unloading under true triaxial principal stress direction interchange, the direction of crack development changes, and the deformation modulus increases, while the cohesion and internal friction angle decrease slightly, indicating that the principal stress direction interchange has a strengthening effect on the surrounding rocks. Finally, the influences of the principal stress interchange direction on the stabilities of deep engineering excavation projects are discussed. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | National Natural Science Foundation of China[51839003] ; National Natural Science Foundation of China[42207221] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001271911000001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42111]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Feng, Xia-Ting; Kong, Rui |
| 作者单位 | 1.Northeastern Univ, Key Lab, Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gu, Liangjie,Feng, Xia-Ting,Kong, Rui,et al. Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(4):1113-1126. |
| APA | Gu, Liangjie,Feng, Xia-Ting,Kong, Rui,Yang, Chengxiang,&Xia, Yuelin.(2024).Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(4),1113-1126. |
| MLA | Gu, Liangjie,et al."Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.4(2024):1113-1126. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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