Multiscale structural characterizations of anisotropic natural granite residual soil
文献类型：期刊论文
| 作者 | Liu, Xinyu1,2; Zhang, Xianwei1; Kong, Lingwei1; Wang, Gang1,2; Li, Chengsheng3 |
| 刊名 | CANADIAN GEOTECHNICAL JOURNAL
 |
| 出版日期 | 2023-07-21 |
| 页码 | 18 |
| 关键词 | granite residual soil strength anisotropy microstructure fissure cementation particle orientation |
| ISSN号 | 0008-3674 |
| DOI | 10.1139/cgj-2022-0188 |
| 英文摘要 | While the anisotropy of sedimentary soil--particularly the underlying role of soil structure--is well understood, similar knowledge about granite residual soil formed by weathering is scarce. In particular, the evolution of soil structure during the hollow cylinder torsional shear tests (among the most appropriate for studying soil strength anisotropy) remains largely unknown. This study systematically investigates the multiscale structural properties of granite residual soil using stereo microscopy, scanning electron microscopy, energy-dispersive spectrometry, and computed tomography. Furthermore, the structural evolution during hollow cylinder torsional shear tests is traced. Results indicate the strength anisotropy of residual soil is associated with horizontal fissures which cause low shear strength when the soil is sheared with a principal stress direction of 45 degrees. The cementation via Fe is characterized by a uniform distribution. Different evolutionary patterns are observed for soils within the shear band, inside the necking area, and in other regions. It is not always the case that particles are rearranged with their long axis perpendicular to the major principal stress. This study improves the understanding of natural residual soil structure and provides some insights into its anisotropic behavior. |
| 资助项目 | National Natu-ral Science Foundation of China[41972285] ; National Natu-ral Science Foundation of China[42177148] ; Youth Innovation Promotion Association CAS[2018363] ; Key R amp; D projects of Hubei Province[2021BAA186] ; Science Fund for Distinguished Young Schol-ars of Hubei Province[2020CFA103] ; CRSRI Open Re-search Program[CKWV2021884/KY] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001036737300001 |
| 出版者 | CANADIAN SCIENCE PUBLISHING |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39106]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Xianwei |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Shantou Univ, Dept Civil & Environm Engn, Shantou 515063, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,et al. Multiscale structural characterizations of anisotropic natural granite residual soil[J]. CANADIAN GEOTECHNICAL JOURNAL,2023:18. |
| APA | Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,Wang, Gang,&Li, Chengsheng.(2023).Multiscale structural characterizations of anisotropic natural granite residual soil.CANADIAN GEOTECHNICAL JOURNAL,18. |
| MLA | Liu, Xinyu,et al."Multiscale structural characterizations of anisotropic natural granite residual soil".CANADIAN GEOTECHNICAL JOURNAL (2023):18. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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