A Numerical Method for Evaluating the Collapse of High-Steep Scarp Slopes Based on the Bonded Block Model-Discrete Fracture Network Model
文献类型：期刊论文
| 作者 | Sun, Zening1,2; Qiu, Shili1; Yan, Siquan3; Wang, Zaiquan2 |
| 刊名 | SUSTAINABILITY
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 15期号:21页码:25 |
| 关键词 | high-steep scarp slope bonded block model-discrete fracture network coupling safety factor for high-steep scarp slope collapse risk analysis |
| DOI | 10.3390/su152115672 |
| 英文摘要 | Geotechnical engineering works in deep-incised valleys or open-pit mining areas often encounter high-steep scarp slopes with a slope angle greater than 75 degrees. This type of slope directly threatens the safety of construction personnel, so assessing their stability is essential to ensure construction safety. The natural geometry of high-steep scarp slopes possesses complexity in terms of geometric morphology, structural features of rock mass, and occurrence mechanisms of collapse. There is little research and less emphasis on the evaluation of the collapse risk of high-steep scarp slopes. In particular, the fracture of intact rock or rock bridges is generally ignored in the analysis of collapse processes. A bonded block model (BBM)-discrete fracture network (DFN) coupling characterization model for the high-steep scarp slope is proposed based on a high-steep scarp slope containing dominant joint sets on the left bank of the dam site of the Huangzangsi Water Conservancy Project (Qinghai Province, China). By using the model, the complex geometric forms of the surface of the high-steep scarp slope are quantified, and the fracture process of falling rock masses as well as the controlling effect of dominant joints on the collapse of the scarp slope are revealed. A strength reduction method based on the BBM-DFN model is constructed, and the safety factor of the collapse-prone scarp slope is evaluated. The research results show that (1) the BBM-DFN model can be used to describe the local collapse process; (2) the occurrence of dominant joints plays an important part in controlling the collapse process; (3) there are differences in the safety factor of the scarp slope with different coupling methods; the collapse and failure modes also differ. For safety considerations, the safety factor of the scarp slope on the left bank of the dam site area is determined to be 1.85. The research findings can be used to guide the safety assessment of high-steep scarp slopes and the formulation of both collapse risk prevention and control measures to ensure construction safety in high-steep scarp slope areas. |
| 资助项目 | National Natural Science Foundation of China[41877256] ; National Natural Science Foundation of China[51879261] ; National Natural Science Foundation of China[U1965205] |
| WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001103281200001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39926]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Qiu, Shili |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Qingdao Univ Technol, Sch Sci, Qingdao 266033, Peoples R China 3.Yellow River Engn Consulting Co Ltd, Zhengzhou 450003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Zening,Qiu, Shili,Yan, Siquan,et al. A Numerical Method for Evaluating the Collapse of High-Steep Scarp Slopes Based on the Bonded Block Model-Discrete Fracture Network Model[J]. SUSTAINABILITY,2023,15(21):25. |
| APA | Sun, Zening,Qiu, Shili,Yan, Siquan,&Wang, Zaiquan.(2023).A Numerical Method for Evaluating the Collapse of High-Steep Scarp Slopes Based on the Bonded Block Model-Discrete Fracture Network Model.SUSTAINABILITY,15(21),25. |
| MLA | Sun, Zening,et al."A Numerical Method for Evaluating the Collapse of High-Steep Scarp Slopes Based on the Bonded Block Model-Discrete Fracture Network Model".SUSTAINABILITY 15.21(2023):25. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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