Experimental and numerical study of the mechanism of block-flexure toppling failure in rock slopes
文献类型：期刊论文
| 作者 | Zhang, Haina1,2; Xu, Xinyang1; Zheng, Yun2; Li, Huan2,3; Guo, Haosen1 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2022 |
| 卷号 | 81期号:1页码:15 |
| 关键词 | Rock slope Block-flexure toppling failure Centrifuge model Failure surface UDEC |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-021-02562-2 |
| 英文摘要 | Block-flexure is the commonest mode of toppling failure and can be frequently encountered in anti-inclined rock slopes. In this work, the failure mechanism of block-flexure toppling (BFT) was investigated using centrifugal and numerical models. The numerical model was configured using the Universal Distinct Element Code (UDEC) and calibrated with the results of the centrifuge test. All the simulation results, including the measured displacements, failure load, and failure surface, are generally in line with that of experimental results. Further, the results of simulations show that, well before the appearance of instability in the jointed rock slope, slipping failure and opening fractures had occurred in the interlayer. Moreover, all the acting points of normal forces in steep joints are located between the bottoms and the midpoints of the columns under consideration, in the process of toppling failure. Finally, sensitivity of joint parameters, including the connectivity rate of discontinuous cross-joints, the thickness of the rock column joint, joint friction angle, and joint cohesion, were performed to investigate the effects of the tensile strength of intact rock. The results indicate that joint cohesion and thickness of the rock column greatly influence the failure load (represents safety factor of the slope). The connectivity rates of the discontinuous cross-joints and joint friction angle were found to have significant effects on the shape and location of the basal failure plane. This research would provide a deep understanding on the failure mechanism of BFT for relevant scholars. |
| 资助项目 | National Natural Science Foundation of China[12072358] ; National Natural Science Foundation of China[11472293] ; Science and Technology Research Project of Education Department of Jiangxi Province[GJJ200661] ; Natural Science Foundation of Jiangxi, China[20202BABL214051] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z020021] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000741004600003 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/30857]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zheng, Yun |
| 作者单位 | 1.East China Jiaotong Univ, Coll Civil Engn & Architecture, Nanchang 330013, Jiangxi, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Jiangxi Copper Technol Res Inst Co Ltd, Nanchang 330029, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Haina,Xu, Xinyang,Zheng, Yun,et al. Experimental and numerical study of the mechanism of block-flexure toppling failure in rock slopes[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2022,81(1):15. |
| APA | Zhang, Haina,Xu, Xinyang,Zheng, Yun,Li, Huan,&Guo, Haosen.(2022).Experimental and numerical study of the mechanism of block-flexure toppling failure in rock slopes.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,81(1),15. |
| MLA | Zhang, Haina,et al."Experimental and numerical study of the mechanism of block-flexure toppling failure in rock slopes".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 81.1(2022):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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