Probabilistic evaluation method for the stability of large underground cavern considering the uncertainty of rock mass mechanical parameters: A case study of Baihetan underground powerhouse project
文献类型：期刊论文
| 作者 | Liu, Guofeng1,2; Zhou, Chi1; Feng, Kun1; Jiang, Quan2; Li, Shengfeng1; Bao, Han1; Li, Ang1 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 340页码:24 |
| 关键词 | Large underground cavern Rock mass mechanical parameters Excavation unloading response Hoek-Brown criterion Monte Carlo simulation |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2024.107660 |
| 英文摘要 | For deep large underground cavern projects under complex geological conditions, the determination of rock mass mechanical parameters and stability analysis is fraught with a great deal of uncertainty. This paper proposes a set of methods for estimating rock mass mechanical parameters and probabilistic stability assessment suitable for construction characteristics of large underground caverns. On the one hand, according to the Hoek-Brown criterion and Monte Carlo simulation, a dynamic estimation method for rock mass mechanical parameters is proposed by using Rock Mass Rating (RMR), the uniaxial compressive strength (UCS) of intact rock, and the material constant (mb) m b ) as input parameters. On the other hand, considering the uncertainty of rock mass mechanical parameters, a probabilistic evaluation method applicable to the unloading response characteristics of rock mass (including displacement and fracturing zones) around the large cavern is put forward, combining the point estimation method and numerical simulation. The proposed methods were applied to an underground powerhouse, with an excavation span of 34 m and height of 88.7 m, at the Baihetan hydropower station in the southwest of China. Based on extensive field investigations and tests, the probability distributions of key rock mass mechanical parameters were obtained. Furthermore, the high sensitivity of input parameters in the H-B criterion for estimating rock mass mechanical parameters were revealed. Through dynamic simulation, the probability distributions of the displacement and fracturing zones in surrounding rock during the layer-by-layer excavation of the cavern were presented. Comprehensive on-site tests showed that the simulated results were in basic agreement with the actual unloading response behavior during the cavern excavation, validating the correctness and applicability of the proposed methods. The study provides a relatively comprehensive approach for estimating rock mass mechanical parameters and stability evaluation in similar underground engineering projects, and also has guiding significance for predicting and preventing engineering rock mass hazards. |
| 资助项目 | National Natural Science Foundation of China[52325905] ; National Natural Science Foundation of China[52039007] ; National Natural Science Foundation of China[52209120] ; Fundamental Research Funds for the Central Universities[300102213203] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME022019] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001294360100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42280]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jiang, Quan |
| 作者单位 | 1.Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Guofeng,Zhou, Chi,Feng, Kun,et al. Probabilistic evaluation method for the stability of large underground cavern considering the uncertainty of rock mass mechanical parameters: A case study of Baihetan underground powerhouse project[J]. ENGINEERING GEOLOGY,2024,340:24. |
| APA | Liu, Guofeng.,Zhou, Chi.,Feng, Kun.,Jiang, Quan.,Li, Shengfeng.,...&Li, Ang.(2024).Probabilistic evaluation method for the stability of large underground cavern considering the uncertainty of rock mass mechanical parameters: A case study of Baihetan underground powerhouse project.ENGINEERING GEOLOGY,340,24. |
| MLA | Liu, Guofeng,et al."Probabilistic evaluation method for the stability of large underground cavern considering the uncertainty of rock mass mechanical parameters: A case study of Baihetan underground powerhouse project".ENGINEERING GEOLOGY 340(2024):24. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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