In situ observation of spalling process of intact rock mass at large cavern excavation
文献类型：期刊论文
| 作者 | Yao, Zhibin2; Liu, Guofeng1; Feng, Xia-Ting1 ; Jiang, Quan1; Li, Shaojun1
|
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2017 |
| 卷号 | 226页码:52-69 |
| 关键词 | Large cavern excavation Stress-induced fracturing Rock spalling process In situ observation Digital borehole camera |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2017.05.012 |
| 英文摘要 | This paper presents the results of in situ observation of rock spalling process of a large underground powerhouse, with 34 m in span and 88.7 m in height, during excavation layer by layer over two years. A method for in situ observation of rock spalling process has been established in pre-installed boreholes by using digital borehole camera. Observation results clearly show the whole process of rock fracturing and the associated spalling failure. Not only could the development of rock fracturing and spalling affected by the step-by-step excavations along the cavern's axis be captured, but also could the effect of the subsequent excavation layer by layer on the previous rock fracturing and spalling area be observed. The failure mechanism of rock mass surrounding the large cavern, which involves complex excavation sequences, could be better understood through the observation results. The difference of rock spalling behavior between large cavern and small tunnel is discussed. Influence of geostress, geological structures, rock mechanical properties, and layered excavation process on rock spalling process has been analyzed. The results in this study is instructive for rethinking the engineering design including the excavation and support at similar large underground caverns, as well as for the dynamic adjustment of excavation schemes and support optimization during the construction of a large cavern subjected to high geostress. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000410869000006 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4118]  |
| 专题 | 岩土力学所知识全产出_期刊论文 岩土力学所知识全产出 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Northeastern Univ, Minist Educ Safe Min Deep Met Mines, Key Lab |
| 推荐引用方式 GB/T 7714 | Yao, Zhibin,Liu, Guofeng,Feng, Xia-Ting,et al. In situ observation of spalling process of intact rock mass at large cavern excavation[J]. ENGINEERING GEOLOGY,2017,226:52-69. |
| APA | Yao, Zhibin,Liu, Guofeng,Feng, Xia-Ting,Jiang, Quan,&Li, Shaojun.(2017).In situ observation of spalling process of intact rock mass at large cavern excavation.ENGINEERING GEOLOGY,226,52-69. |
| MLA | Yao, Zhibin,et al."In situ observation of spalling process of intact rock mass at large cavern excavation".ENGINEERING GEOLOGY 226(2017):52-69. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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