Interaction between anti-shear galleries and surrounding rock in the right-bank slope of Dagangshan hydropower station
文献类型：期刊论文
| 作者 | LI Lian-chong; XING Ya-zi; LIU Xing-zong; MA Ke; XU Nu-wen; ZHANG Fei |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2017-07 |
| 卷号 | 14期号:7页码:1428-1444 |
| ISSN号 | 1672-6316 |
| 关键词 | Slope Stability Microseismic Monitoring Numerical Simulation Safety Factor Anti-shear Gallery |
| DOI | 10.1007/s11629-016-4318-3 |
| 通讯作者 | LI Lian-chong |
| 文献子类 | 期刊论文 |
| 英文摘要 | The right-bank slope of the Dagangshan hydropower station located in Southwest China is a highly unloaded rock slope. Moreover, large-scale natural faults were detected in the slope body; some excavation-induced unloading fractures were discovered at elevations between 1075m and 1146m. Because of poor tectonic stability, the excavation work was suspended in September 2009, and six large-scale anti-shear galleries were employed to replace the weak zone in the slope body to reinforce the right-bank slope. In this study, based on microseismic-monitoring technology and a numerical-simulation method, the stabilities of the slope with and without the reinforcement are analysed. An in-situ microseismic-monitoring system is used to obtain quantitative information about the damage location, extent, energy, and magnitude of the rocks. Thus, any potential sliding block in the right-bank slope can be identified. By incorporating the numerical results along with the microseismic-monitoring data, the stress concentration is found to largely occur around the anti-shear galleries, and the seismic deformation near the anti-shear galleries is apparent, particularly at elevations of 1210, 1180, 1150, and 1120m. To understand the interaction mechanism between the anti-shear gallery and the surrounding rock, a 2D simulation of the potential damage process occurring in an anti-shear gallery is performed. The numerical simulation helps in obtaining additional information about the stress distribution and failure-induced stress re-distribution in the vicinity of the anti-shear galleries that cannot be directly observed in the field. Finally, the potential sliding surface of the right-bank slope is numerically obtained, which generally agrees with thespatial distribution of the in-situ monitored microseismic events. The safety factor of the slope reinforced with the anti-shear gallery increases by approximately 36.2%. Both the numerical results and microseismic data show that the anti-shear galleries have a good reinforcement effect. |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/18935]  |
| 专题 | Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.7 |
| 推荐引用方式 GB/T 7714 | LI Lian-chong,XING Ya-zi,LIU Xing-zong,et al. Interaction between anti-shear galleries and surrounding rock in the right-bank slope of Dagangshan hydropower station[J]. Journal of Mountain Science,2017,14(7):1428-1444. |
| APA | LI Lian-chong,XING Ya-zi,LIU Xing-zong,MA Ke,XU Nu-wen,&ZHANG Fei.(2017).Interaction between anti-shear galleries and surrounding rock in the right-bank slope of Dagangshan hydropower station.Journal of Mountain Science,14(7),1428-1444. |
| MLA | LI Lian-chong,et al."Interaction between anti-shear galleries and surrounding rock in the right-bank slope of Dagangshan hydropower station".Journal of Mountain Science 14.7(2017):1428-1444. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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