Plastic zone characteristics and rapid stability evaluation indexes of circular tunnels subjected to non-hydrostatic stress: A novel complex variable solution incorporating 3D rock mass strength
文献类型：期刊论文
| 作者 | Ma, Yaocai1; Cai, Wuqiang1,2; Zhu, Hehua1,3; Su, Chenlong1; Wei, Xiangyang1 |
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
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| 出版日期 | 2024-09-01 |
| 卷号 | 151页码:16 |
| 关键词 | Deep tunnel Non-hydrostatic stress Localized failure Plastic zone characteristics Complex variable method |
| ISSN号 | 0886-7798 |
| DOI | 10.1016/j.tust.2024.105868 |
| 英文摘要 | The morphological characteristics and distribution range of the plastic zone around tunnels, influenced by the true three-dimensional high geostress environment in deep engineering, constitute fundamental reference data for both tunnel design and the control of surrounding rock stability. Based on the GZZ three-dimensional rock mass strength criteria and the complex variable method, a novel semi-analytical method for solving the plastic zone of a circular tunnel subjected to non-hydrostatic stress is presented. The conformal mapping is employed to intricately transform the complex boundaries of plastic zones characterized by diverse shapes onto the unit circle boundary within the image plane. This framework proves invaluable for the precise analytical process of the complex plastic zone morphology and the plastic influence range within the surrounding rock under complex stress conditions. In contrast to traditional analytical methods, the efficacy and versatility of our proposed approach are substantiated. Notably, it demonstrates unique advantages, particularly in the context of nonhydrostatic stress fields and varied rock mass parameters, with respect to predicting both surrounding rock stability and plastic zone morphology. Through the analysis of numerous cases, the study reveals the systematic patterns of influence that in-situ stress and surrounding rock characteristic parameters have on the shape and maximum depth of the plastic zone. The results indicate that (1) there are notable disparities in the morphology and extent of the plastic zone between the GZZ and GHB criteria; (2) the transition of the plastic zone in surrounding rock from U-shaped to V-shaped is significantly influenced by the geostress-to-strength ratio K sigma; (3) there is a notable linear correlation observed between the maximum plastic zone thickness rmax and both K sigma and the stress concentration factor KSCF, importantly, this correlation is independent of far-field stress and the brittleness characteristics of the surrounding rock. These findings provide a novel discriminative method for the rapid analysis of surrounding rock stability in deep circular tunnels. |
| 资助项目 | China National Postdoctoral Program for Innovative Talents[BX20230267] ; National Natural Science Foundation of China[42307206] ; China Postdoctoral Science Foundation[2023 M732667] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001251557700001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41789]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Cai, Wuqiang |
| 作者单位 | 1.Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai 200092, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Beijing, Peoples R China 3.Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai 200092, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Yaocai,Cai, Wuqiang,Zhu, Hehua,et al. Plastic zone characteristics and rapid stability evaluation indexes of circular tunnels subjected to non-hydrostatic stress: A novel complex variable solution incorporating 3D rock mass strength[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2024,151:16. |
| APA | Ma, Yaocai,Cai, Wuqiang,Zhu, Hehua,Su, Chenlong,&Wei, Xiangyang.(2024).Plastic zone characteristics and rapid stability evaluation indexes of circular tunnels subjected to non-hydrostatic stress: A novel complex variable solution incorporating 3D rock mass strength.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,151,16. |
| MLA | Ma, Yaocai,et al."Plastic zone characteristics and rapid stability evaluation indexes of circular tunnels subjected to non-hydrostatic stress: A novel complex variable solution incorporating 3D rock mass strength".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 151(2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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