Grading opening and shearing deformation of deep outward-dip shear belts inside high slope: A case study
文献类型：期刊论文
| 作者 | Jiang, Quan; Yan, Fei; Wu, Jiayao; Fan, Qixiang; Li, Shaojun; Xu, Dingping |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 250期号:-页码:113-129 |
| 关键词 | High slope Unloading excavation Numerical back analysis Shearing deformation Shear belt |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2019.01.018 |
| 英文摘要 | Tectonic shear belts, with their low mechanical strengths, large spatial extents and obvious shearing damage, present challenges for the excavation of high slopes. In this study, we described the basic unloading performances of shear belts induced by excavation through observational data and numerical back analysis. The unloading deformation and failure processes of deep outward-dipping shear belts exposed on a hydraulic slope nearly 300 m tall were investigated first. The field observation and monitoring data indicated that the excavation-induced deformation pattern of the outward-dipping shear belt can be divided into two stages: primarily opening deformation normal to the shear belt during the first stage and primarily shear deformation along the shear belt during the second stage, manifested as opening and shear cracks along the active shear belt. Then, the numerical and analytical analysis were performed to expose the displacement evolution of the shear belt during the multistep excavation of the slope from the top down. The back analysis showed that the grading deformation mechanism of the shear belt was primarily related to the reduction of normal compressive stress on the shear belt's plane due to slope excavation. The reinforcement schemes, including a prestressed anchor cable to limit deep unloading deformation and a prestressed rock bolt to restrain the surface relaxation of the rock mass of the slope, were also discussed. In practice, actual excavation and corresponding monitoring data indicated that the unloading mechanism and supporting measures for the shear belt presented in this study were reasonable and effective. These presented experiences can also enrich the stability analysis and support design for similar high slopes. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000461404500009 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/15044]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Quan,Yan, Fei,Wu, Jiayao,et al. Grading opening and shearing deformation of deep outward-dip shear belts inside high slope: A case study[J]. ENGINEERING GEOLOGY,2019,250(-):113-129. |
| APA | Jiang, Quan,Yan, Fei,Wu, Jiayao,Fan, Qixiang,Li, Shaojun,&Xu, Dingping.(2019).Grading opening and shearing deformation of deep outward-dip shear belts inside high slope: A case study.ENGINEERING GEOLOGY,250(-),113-129. |
| MLA | Jiang, Quan,et al."Grading opening and shearing deformation of deep outward-dip shear belts inside high slope: A case study".ENGINEERING GEOLOGY 250.-(2019):113-129. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。