Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station
The high rock slope on the right bank of a hydropower station on Lancang river, which isto be built, is excavated for nearly 400 m.According to the on-site geological survey, the rockmass of the slope is hard and brittle dacite with strong unloading, and small and medium-sizedfaults developed in the...
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| Language: | zho |
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Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
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| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.01.002 |
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| author | LU Bifeng DENG Hui HAO Hao LI Anrun LI Wancai |
| author_facet | LU Bifeng DENG Hui HAO Hao LI Anrun LI Wancai |
| author_sort | LU Bifeng |
| collection | DOAJ |
| description | The high rock slope on the right bank of a hydropower station on Lancang river, which isto be built, is excavated for nearly 400 m.According to the on-site geological survey, the rockmass of the slope is hard and brittle dacite with strong unloading, and small and medium-sizedfaults developed in the slope.In addition, there are two ductile shear zones that dipping towardto the inside slope in the right bank slope,and mylonization occurs in the shear zone, which leadsto the very complex geological conditions and rock mass structure of the right bank slope. Inorder to study the mechanism and rule of deformation response of high rock slope excavation underthis condition, this paper selects the right-bank dam axis slope of hydropower station as theresearch object, and simulates the excavation process of the slope by the UDEC (universal distinctelement code). The results show that:(1) The excavation results in large deformation of theshallow rock mass in the ductile shear zone, which affects the stability of the slope; (2) Thedeformation caused by excavation is mainly controlled by the unloading fissure and overflowsurface that dipping toward to the outside slope, and the geological-mechanical deformation andfailure mode is mainly slipping and fracturing; (3) The slope mainly occurs lateral displacementafter excavation, and its cumulative displacement mode is transmission to high elevation andaccumulation at the trailing edge; (4) The slope excavation and the resulting deformation energyare kept in sync, and finally affected by the elastic recovery lag of rock mass, and the residualdeformation is small near the end of excavation. |
| format | Article |
| id | doaj-art-00f3288aba4b4121831818f2e67520b8 |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2020-01-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-00f3288aba4b4121831818f2e67520b82025-01-15T02:31:09ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352020-01-014147651632Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower StationLU BifengDENG HuiHAO HaoLI AnrunLI WancaiThe high rock slope on the right bank of a hydropower station on Lancang river, which isto be built, is excavated for nearly 400 m.According to the on-site geological survey, the rockmass of the slope is hard and brittle dacite with strong unloading, and small and medium-sizedfaults developed in the slope.In addition, there are two ductile shear zones that dipping towardto the inside slope in the right bank slope,and mylonization occurs in the shear zone, which leadsto the very complex geological conditions and rock mass structure of the right bank slope. Inorder to study the mechanism and rule of deformation response of high rock slope excavation underthis condition, this paper selects the right-bank dam axis slope of hydropower station as theresearch object, and simulates the excavation process of the slope by the UDEC (universal distinctelement code). The results show that:(1) The excavation results in large deformation of theshallow rock mass in the ductile shear zone, which affects the stability of the slope; (2) Thedeformation caused by excavation is mainly controlled by the unloading fissure and overflowsurface that dipping toward to the outside slope, and the geological-mechanical deformation andfailure mode is mainly slipping and fracturing; (3) The slope mainly occurs lateral displacementafter excavation, and its cumulative displacement mode is transmission to high elevation andaccumulation at the trailing edge; (4) The slope excavation and the resulting deformation energyare kept in sync, and finally affected by the elastic recovery lag of rock mass, and the residualdeformation is small near the end of excavation.http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.01.002ductile shear zonehigh rock slopediscrete element simulationexcavation deformationresponseslipping and fracturing |
| spellingShingle | LU Bifeng DENG Hui HAO Hao LI Anrun LI Wancai Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station Renmin Zhujiang ductile shear zone high rock slope discrete element simulation excavation deformationresponse slipping and fracturing |
| title | Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station |
| title_full | Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station |
| title_fullStr | Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station |
| title_full_unstemmed | Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station |
| title_short | Study on the Development Characteristics of Ductile Shear Zone andDeformation Response of Slope Excavation in a Hydropower Station |
| title_sort | study on the development characteristics of ductile shear zone anddeformation response of slope excavation in a hydropower station |
| topic | ductile shear zone high rock slope discrete element simulation excavation deformationresponse slipping and fracturing |
| url | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.01.002 |
| work_keys_str_mv | AT lubifeng studyonthedevelopmentcharacteristicsofductileshearzoneanddeformationresponseofslopeexcavationinahydropowerstation AT denghui studyonthedevelopmentcharacteristicsofductileshearzoneanddeformationresponseofslopeexcavationinahydropowerstation AT haohao studyonthedevelopmentcharacteristicsofductileshearzoneanddeformationresponseofslopeexcavationinahydropowerstation AT lianrun studyonthedevelopmentcharacteristicsofductileshearzoneanddeformationresponseofslopeexcavationinahydropowerstation AT liwancai studyonthedevelopmentcharacteristicsofductileshearzoneanddeformationresponseofslopeexcavationinahydropowerstation |