The Unified Theoretical Model for Predicting the Full-Cycle Stability of Hydraulic Tunnels
文献类型：期刊论文
| 作者 | Zhao, Nannan1,2; Shao, Zhushan1; Wu, Kui1,2 |
| 刊名 | INTERNATIONAL JOURNAL OF APPLIED MECHANICS
 |
| 出版日期 | 2024-11-16 |
| 页码 | 28 |
| 关键词 | Hydraulic tunnel elastoplastic deformation loosening zone water pressure analytical model |
| ISSN号 | 1758-8251 |
| DOI | 10.1142/S175882512450114X |
| 英文摘要 | The stability of hydraulic tunnels is crucial to the safety of water conservancy and hydropower engineering. Previous studies mostly focused on evaluating the stability of hydraulic tunnels within a certain stage. This study presents a full-cycle stability prediction of hydraulic tunnels from the construction to the operation stages. The corresponding unified theoretical model is established, where the installation delay of lining is considered. On the premise that the rock satisfies the Hoek-Brown strength criterion, the mechanical responses of hydraulic tunnels are classified into six cases to discuss, according to the development laws of elastoplastic deformation of surrounding rock during the whole stage. The analytical solutions for the stress and displacement of surrounding rock are provided in each case, and the mathematical expressions are proposed for determining the critical support pressure (no plastic zone generated), minimum support pressure (no loosening zone generated) and critical water pressure (exchange of the directions of the maximum and minimum principal stresses), respectively. Furthermore, the reliability of the theoretical derivation is well verified by implementing it in two engineering projects and comparing it with previous solutions. Finally, a comprehensive parametric investigation is conducted based on the proposed theoretical model, including the geological strength index (GSI), disturbance coefficient (D-0) and water pressure (P-h). It can be found that both the increase in the GSI value and the decrease in the D-0 value can cause a decrease in the plastic radius of the surrounding rock, thus leading to a decrease in the tunnel displacement. The directions of the principal stresses in the surrounding rock may exchange and the tangential tensile stresses will generate as the water pressure increases. The required critical water pressure becomes higher with a higher GSI value. The increases in the loosening radius of surrounding rock and the critical support pressure can be observed as the GSI value decreases. The results of this study can provide useful guidance for the design of hydraulic tunnels. |
| 资助项目 | Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME022013] ; National Natural Science Foundation of China[52408438] ; China Postdoctoral Science Foundation[2024MD753969] ; Scientific Research Foundation for Excellent Returned Overseas Chinese Scholars - Shaanxi Provincial Government[2023-021] |
| WOS研究方向 | Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001357157200004 |
| 出版者 | WORLD SCIENTIFIC PUBL CO PTE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43216]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wu, Kui |
| 作者单位 | 1.Xian Univ Architecture & Technol, Sch Sci, Xian 710055, 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 | Zhao, Nannan,Shao, Zhushan,Wu, Kui. The Unified Theoretical Model for Predicting the Full-Cycle Stability of Hydraulic Tunnels[J]. INTERNATIONAL JOURNAL OF APPLIED MECHANICS,2024:28. |
| APA | Zhao, Nannan,Shao, Zhushan,&Wu, Kui.(2024).The Unified Theoretical Model for Predicting the Full-Cycle Stability of Hydraulic Tunnels.INTERNATIONAL JOURNAL OF APPLIED MECHANICS,28. |
| MLA | Zhao, Nannan,et al."The Unified Theoretical Model for Predicting the Full-Cycle Stability of Hydraulic Tunnels".INTERNATIONAL JOURNAL OF APPLIED MECHANICS (2024):28. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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