Collapse behavior and microstructural evolution of loess soils from the Loess Plateau of China
文献类型：期刊论文
| 作者 | Xie Wan-li; Li Ping; Zhang Mao-sheng; Cheng Tian-e; Wang Yong |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2018 |
| 卷号 | 15期号:8页码:1642-1657 |
| 关键词 | Loess Collapse Microstructure Scanning electron microscopy Image processing Pore morphology properties |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-018-5006-2 |
| 文献子类 | Article |
| 英文摘要 | Loess soils are characterized by metastable microstructure, high porosity and water-sensitivity. These soils have always been problematic soils and attracted attention from researchers all over the world. In the present study, three loess soils extracted at various depths from the Loess Plateau of China, i.e. Malan (Q(3)), upper Lishi (Q(2) (2)) and lower Lishi (Q(2) (1)) loess soils, were studied. Single oedometer-collapse tests were performed on intact loess specimens to investigate the collapse behavior of three loess soils. The microstructure and chemical composition of each loess before and after collapse test were characterized using scanning electron microscopy (i.e. SEM) and energy dispersive spectroscopy (i.e. EDS) techniques. The microstructural evolution due to wetting collapse was interpreted qualitatively and quantitatively in terms of the pore morphology properties. The results suggest that: a the collapse potential of each loess may rise again after a round of rise and drop, which could be failure of the new-developed stable structure under quite high vertical pressure. It implies that loess may collapse even if it has collapsed. a Q(3), Q(2) (2) and Q(2) (1) loess have different types of microstructure, namely, granule, aggregate and matrix type of microstructure, respectively. a cent The microstructural evolution due to loading and wetting is observed from a granule type to an aggregate type and finally to a matrix type of structure. The variations in distributions of pore morphology properties indicate that collapse leads to a transformation of large-sized pores into small-sized pores, re-orientation and remolding of soil pores due to particle rearrangement. a pound A porous structure is essential for loess collapse; however, the non-water-stability of bonding agents promotes the occurrence of collapse under the coupling effect of loading and wetting. |
| 电子版国际标准刊号 | 1993-0321 |
| 语种 | 英语 |
| WOS记录号 | WOS:000442239600003 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/35563]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.8 |
| 推荐引用方式 GB/T 7714 | Xie Wan-li,Li Ping,Zhang Mao-sheng,et al. Collapse behavior and microstructural evolution of loess soils from the Loess Plateau of China[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(8):1642-1657. |
| APA | Xie Wan-li,Li Ping,Zhang Mao-sheng,Cheng Tian-e,&Wang Yong.(2018).Collapse behavior and microstructural evolution of loess soils from the Loess Plateau of China.JOURNAL OF MOUNTAIN SCIENCE,15(8),1642-1657. |
| MLA | Xie Wan-li,et al."Collapse behavior and microstructural evolution of loess soils from the Loess Plateau of China".JOURNAL OF MOUNTAIN SCIENCE 15.8(2018):1642-1657. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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