IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2017  > Vol14 No.7
Interaction between anti-shear galleries and surrounding rock in the right-bank slope of Dagangshan hydropower station
LI Lian-chong; XING Ya-zi; LIU Xing-zong; MA Ke; XU Nu-wen; ZHANG Fei
Corresponding AuthorLI Lian-chong
2017-07
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume14Issue:7Pages:1428-1444
Subtype期刊论文
AbstractThe 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.
KeywordSlope Stability Microseismic Monitoring Numerical Simulation Safety Factor Anti-shear Gallery
DOI10.1007/s11629-016-4318-3
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18935
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.7
Recommended Citation
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.
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