Sliding mechanical properties of fault gouge studied from ring shear test-based microscopic morphology characterization
文献类型：期刊论文
| 作者 | Bao, Han1; Qi, Qun1,4; Lan, Hengxing2; Yan, Changgen1; Feng, Li3; Xu, Jiangbo1; Yin, Peijie1; Peng, Jianbing5 |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2020-12-20 |
| 卷号 | 279页码:16 |
| ISSN号 | 0013-7952 |
| 关键词 | Fault gouge Landslide Ring shear test Sliding mechanical property SEM Sliding scratch |
| DOI | 10.1016/j.enggeo.2020.105879 |
| 通讯作者 | Lan, Hengxing(Lanhx@igsnrr.ac.cn) |
| 英文摘要 | Fault activity is a factor causing geological disasters and controlling their spatial distribution. The information on fault activity can be recorded by the microstructure of the fault gouge sliding surface, which provides an approach to study the macroscopic mechanical behavior of faults. In this study, the ring shear test was used to simulate the shear sliding behavior of a fault gouge under different stress states and water contents, and the microstructure of the shear sliding surface was quantitatively analyzed using scanning electron microscopy (SEM). The results revealed an evident relationship between the microstructure and macroscopic mechanical properties of the fault gouge. The microstructure, represented by sliding scratches, was primarily created by the movement of coarse particles, such as sand and quartz. An index of the sliding scratch ratio was proposed to characterize the microstructure. The sliding scratch ratio is negatively correlated with water content and normal stress, and a multivariate model of sliding scratch ratio was established with water content, normal stress and coarse particle contents. Allying the model to natural scratches of the fault gouge reveals that the observed sliding scratches were formed during slope sliding, which proves the influence of fault on the occurrence of the studied landslide. Influenced by the "Gully Land Consolidation" projects in the Loess Plateau of China, the groundwater level may increase and then weaken the shear strength of fault gouge, reducing the stability of slopes crossed by fault zone. Therefore, more attention should be paid to potential geological disasters induced by faults in gully filled areas |
| 资助项目 | National Natural Science Foundation of China[41525010] ; National Natural Science Foundation of China[41790443] ; National Natural Science Foundation of China[41807246] ; National Natural Science Foundation of China[41927806] ; National Key R&D Program of China[2019YFC1520601] ; Fundamental Research Funds for the Central Universities, CHD[300102290201] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000597310200020 |
| 资助机构 | National Natural Science Foundation of China ; National Key R&D Program of China ; Fundamental Research Funds for the Central Universities, CHD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/137587]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Lan, Hengxing |
| 作者单位 | 1.Changan Univ, Sch Highway, Middle Sect Naner Huan Rd, Xian 710064, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, 11A,Datun Rd, Beijing 100101, Peoples R China 3.China Geol Survey, Xian Ctr, Minist Nat Resources, Key Lab Geohazard Loess Area, Xian 710054, Shaanxi, Peoples R China 4.Cent South Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China 5.Changan Univ, Sch Geol Engn & Geomat, Xian 710064, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bao, Han,Qi, Qun,Lan, Hengxing,et al. Sliding mechanical properties of fault gouge studied from ring shear test-based microscopic morphology characterization[J]. ENGINEERING GEOLOGY,2020,279:16. |
| APA | Bao, Han.,Qi, Qun.,Lan, Hengxing.,Yan, Changgen.,Feng, Li.,...&Peng, Jianbing.(2020).Sliding mechanical properties of fault gouge studied from ring shear test-based microscopic morphology characterization.ENGINEERING GEOLOGY,279,16. |
| MLA | Bao, Han,et al."Sliding mechanical properties of fault gouge studied from ring shear test-based microscopic morphology characterization".ENGINEERING GEOLOGY 279(2020):16. |
入库方式： OAI收割
来源：地理科学与资源研究所
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