Investigation on the failure mechanism of a tunnel entrance high-steep slope with ultra-large wedge blocks based on discrete element method
文献类型：期刊论文
| 作者 | Xu, Huai-sheng1,3; Li, Shao-jun1; Xu, Ding-ping1; Liu, Xiu-yang1,3; Xia, Yue-lin1,3; Wang, Guan-qi2; Ma, Xing-dong2; Zhou, Zheng-jun2 |
| 刊名 | COMPUTERS AND GEOTECHNICS
 |
| 出版日期 | 2024-02-01 |
| 卷号 | 166页码:15 |
| 关键词 | High-steep slope Fault Wedge block Kinematic analysis Failure mechanism Discrete element method |
| ISSN号 | 0266-352X |
| DOI | 10.1016/j.compgeo.2023.106055 |
| 英文摘要 | An unstable wedge block with a volume of approximately 1,200,000 m3, intersected by an anti-dipped large fault and two outward-dipped faults, has been identified on the high-steep slope at the entrance of the tunnel spillway of the Shuangjiangkou hydropower station in China, a region characterized by high tectonic stresses. In this study, kinematic analysis was first conducted to preliminarily assess the possibility of block sliding, and then a three-dimensional discrete element code (3DEC) was utilized to analyze the mechanism of block instability during sequential excavation and reinforcement. The results showed that block sliding is caused by continuous excavation and deterioration of the mechanical properties of the bottom sliding surface. The failure behavior of the slope is primarily governed by the wedge block, which slides along the intersection line of two outwarddipped faults. After the excavation of Layers 1-4, the shear displacements of the faults exhibited accelerated and abrupt characteristics. Finally, the pretension cable proved effective in restraining block sliding, increasing the factor of safety for the slope from 1.16 to 1.28 after complete excavation and reinforcement. This study offers significant insights into the analysis of failure mechanisms in similar engineering challenges. |
| 资助项目 | National Natural Science Foundation of China[52279117] ; National Natural Science Foundation of China[51979268] ; Foundation for Innova- tive Research Groups of Hubei Province of China[ZRQT2020000114] |
| WOS研究方向 | Computer Science ; Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001156630600001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40555]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Xu, Ding-ping |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 2.Power China Chengdu Engn Corp Ltd, Chengdu 610072, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Huai-sheng,Li, Shao-jun,Xu, Ding-ping,et al. Investigation on the failure mechanism of a tunnel entrance high-steep slope with ultra-large wedge blocks based on discrete element method[J]. COMPUTERS AND GEOTECHNICS,2024,166:15. |
| APA | Xu, Huai-sheng.,Li, Shao-jun.,Xu, Ding-ping.,Liu, Xiu-yang.,Xia, Yue-lin.,...&Zhou, Zheng-jun.(2024).Investigation on the failure mechanism of a tunnel entrance high-steep slope with ultra-large wedge blocks based on discrete element method.COMPUTERS AND GEOTECHNICS,166,15. |
| MLA | Xu, Huai-sheng,et al."Investigation on the failure mechanism of a tunnel entrance high-steep slope with ultra-large wedge blocks based on discrete element method".COMPUTERS AND GEOTECHNICS 166(2024):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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