Understanding the failure mechanism of a large underground cavern in steeply dipping layered rock mass using an enhanced ubiquitous-joint model
文献类型：期刊论文
| 作者 | Zhou, Yang-Yi2; Xu, Ding-Ping3; Liu, Ke1; Chen, Dong-Fang4 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2021-03-26 |
| 页码 | 18 |
| 关键词 | Equivalent continuum model Layered rock mass Bedding plane Anisotropy Failure mechanism |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-021-02213-6 |
| 英文摘要 | To understand the mechanical behavior and failure mechanism of the surrounding layered rock masses during the excavation of underground caverns for a hydropower station, an enhanced equivalent continuum model based on the ubiquitous-joint concept is developed and compiled as a plugin DLL file in FLAC(3D). This model is then applied to analyze two engineering geological issues arisen during the excavations of a large underground powerhouse. Both cases are the typical responses controlled primarily by the internal structure of layered rock mass. The first case is mainly concerned with the continuous increase in the displacement of the upstream sidewall after removal of an auxiliary tunnel crown. Numerical simulation reveals the mixed shear-tensile fractures developed along bedding planes. The preserved crown thickness can affect the maximum displacement of sidewall. Failure region will progressively deepen into the interior if no effective reinforcements are adopted. The second case exhibits as the gradual cracking or slabbing of the shotcrete at downstream roof. Stress concentration is the main cause of shotcrete cracking as shown by numerical simulation. The degree of stress concentration can be influenced largely by the angle between rock strata and cavern axis. This degree also varies with the initial stress level and with excavation process, which is confirmed by field monitoring data. The validity and capability of the newly developed model are thus verified by the actual engineering issues. |
| 资助项目 | Wudongde Project Construction Department, China Three Gorges Projects Development Co., Ltd ; National Natural Science Foundation of China[51709043] ; National Natural Science Foundation of China[51309219] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000633287400001 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25970]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Xu, Ding-Ping |
| 作者单位 | 1.China Three Gorges Projects Dev Co Ltd, Wudongde Project Construct Dept, Kunming 541004, Yunnan, Peoples R China 2.Northeastern Univ, Minist Educ Safe Min Deep Met Mines, Key Lab, Shenyang 110819, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Yang-Yi,Xu, Ding-Ping,Liu, Ke,et al. Understanding the failure mechanism of a large underground cavern in steeply dipping layered rock mass using an enhanced ubiquitous-joint model[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2021:18. |
| APA | Zhou, Yang-Yi,Xu, Ding-Ping,Liu, Ke,&Chen, Dong-Fang.(2021).Understanding the failure mechanism of a large underground cavern in steeply dipping layered rock mass using an enhanced ubiquitous-joint model.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,18. |
| MLA | Zhou, Yang-Yi,et al."Understanding the failure mechanism of a large underground cavern in steeply dipping layered rock mass using an enhanced ubiquitous-joint model".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2021):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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