Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China
To recommend the excavation procedures and design parameters for underground powerhouses, excavation procedures of fifty-one underground powerhouses in China were summarized and analyzed based on in situ stress conditions. Firstly, the complex stress environment in China was introduced and fifty-one...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/21/10252 |
| _version_ | 1797512781979713536 |
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| author | Xiao Liu Peng Yan Ming Chen Sheng Luo Ang Lu Wenbo Lu Gaohui Wang Shuling Huang |
| author_facet | Xiao Liu Peng Yan Ming Chen Sheng Luo Ang Lu Wenbo Lu Gaohui Wang Shuling Huang |
| author_sort | Xiao Liu |
| collection | DOAJ |
| description | To recommend the excavation procedures and design parameters for underground powerhouses, excavation procedures of fifty-one underground powerhouses in China were summarized and analyzed based on in situ stress conditions. Firstly, the complex stress environment in China was introduced and fifty-one underground powerhouses with their engineering scale, size, lithology, rock classification and in situ stress level were listed in detail. Subsequently, to evaluate the influence of in situ stress levels on excavation procedure design, the correlation between excavation procedures and in situ stress level in three main excavation zones were analyzed accordingly. Moreover, to provide the excavation design recommendations, the strength–stress ratio (SSR) was promoted to analyze and recommend the design parameters, and the blasting excavation design based on the stress transient unloading control was also supplemented. The results show that excavation procedures have different priorities under different in situ stress levels, and the design parameters show an obvious relationship with in situ stress levels. Moreover, the excavation procedure parameters are suggested to adjust accordingly under different SSR. The discussion of influencing factors and specification ensures its rationality and accuracy. It is believed that the summary and recommendations can provide a good reference for excavation procedure optimization of underground powerhouse under high in situ stress. |
| first_indexed | 2024-03-10T06:06:32Z |
| format | Article |
| id | doaj.art-6e33f1f2635c4b7c86caa00a144e00e9 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T06:06:32Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-6e33f1f2635c4b7c86caa00a144e00e92023-11-22T20:30:03ZengMDPI AGApplied Sciences2076-34172021-11-0111211025210.3390/app112110252Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in ChinaXiao Liu0Peng Yan1Ming Chen2Sheng Luo3Ang Lu4Wenbo Lu5Gaohui Wang6Shuling Huang7State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, ChinaKey Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Changjiang River Scientific Research Institute, Wuhan 430010, ChinaTo recommend the excavation procedures and design parameters for underground powerhouses, excavation procedures of fifty-one underground powerhouses in China were summarized and analyzed based on in situ stress conditions. Firstly, the complex stress environment in China was introduced and fifty-one underground powerhouses with their engineering scale, size, lithology, rock classification and in situ stress level were listed in detail. Subsequently, to evaluate the influence of in situ stress levels on excavation procedure design, the correlation between excavation procedures and in situ stress level in three main excavation zones were analyzed accordingly. Moreover, to provide the excavation design recommendations, the strength–stress ratio (SSR) was promoted to analyze and recommend the design parameters, and the blasting excavation design based on the stress transient unloading control was also supplemented. The results show that excavation procedures have different priorities under different in situ stress levels, and the design parameters show an obvious relationship with in situ stress levels. Moreover, the excavation procedure parameters are suggested to adjust accordingly under different SSR. The discussion of influencing factors and specification ensures its rationality and accuracy. It is believed that the summary and recommendations can provide a good reference for excavation procedure optimization of underground powerhouse under high in situ stress.https://www.mdpi.com/2076-3417/11/21/10252underground powerhouseexcavation procedurehigh in situ stressstrength–stress ratio |
| spellingShingle | Xiao Liu Peng Yan Ming Chen Sheng Luo Ang Lu Wenbo Lu Gaohui Wang Shuling Huang Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China Applied Sciences underground powerhouse excavation procedure high in situ stress strength–stress ratio |
| title | Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China |
| title_full | Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China |
| title_fullStr | Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China |
| title_full_unstemmed | Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China |
| title_short | Optimization Analysis of Excavation Procedure Design of Underground Powerhouses under High In Situ Stress in China |
| title_sort | optimization analysis of excavation procedure design of underground powerhouses under high in situ stress in china |
| topic | underground powerhouse excavation procedure high in situ stress strength–stress ratio |
| url | https://www.mdpi.com/2076-3417/11/21/10252 |
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