Mechanism of slope failure in loess terrains during spring thawing
文献类型：期刊论文
| 作者 | Xu, Jian; Wang, Zhang-quan; Ren, Jian-wei; Wang, Song-he; Jin, Long |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2018 |
| 卷号 | 15期号:4页码:845-858 |
| 关键词 | Freeze and thaw Loess Slope failure Water migration Heat transfer |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-017-4584-8 |
| 文献子类 | Article |
| 英文摘要 | Slope failure in loess terrains of Northern China during spring thawing period is closely related to the freeze-thaw cycling that surface soils inevitably experienced. Field surveys were carried out on natural and artificial slopes in thirteen surveying sites located in the Northern Shaanxi, the center of Loess Plateau, covering five characteristic topographic features including tablelands, ridges, hills, gullies and valleys. Based on the scale that is involved in freeze-thaw cycling, the induced failures can be classified into three main modes, i.e., erosion, peeling and thaw collapse, depending on both high porosity and loose cementation of loess that is easily affected. Model tests on loess slopes with gradients of 53.1A degrees, 45.0A degrees and 33.7A degrees were carried out to reveal the heat transfer, water migration and deformation during slope failure. The surface morphology of slopes was photographed, with flake shaped erosion and cracks noted. For three slope models, time histories for the thermal regime exhibit three obvious cycles of freeze and thaw and the maximum frost depth develops downwards as freeze-thaw cycling proceeds. Soil water in the unfrozen domain beneath was migrated towards the slope surface, as can be noticed from the considerable change in the unfrozen water content, almost synchronous with the variation of temperature. The displacement in both vertical and horizontal directions varies over time and three obvious cycles can be traced. The residual displacement for each cycle tends to grow and the slopes with higher gradients are more sensitive to potentially sliding during freeze-thaw cycling. |
| 电子版国际标准刊号 | 1993-0321 |
| 语种 | 英语 |
| WOS记录号 | WOS:000429949900013 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/35429]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.4 |
| 推荐引用方式 GB/T 7714 | Xu, Jian,Wang, Zhang-quan,Ren, Jian-wei,et al. Mechanism of slope failure in loess terrains during spring thawing[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(4):845-858. |
| APA | Xu, Jian,Wang, Zhang-quan,Ren, Jian-wei,Wang, Song-he,&Jin, Long.(2018).Mechanism of slope failure in loess terrains during spring thawing.JOURNAL OF MOUNTAIN SCIENCE,15(4),845-858. |
| MLA | Xu, Jian,et al."Mechanism of slope failure in loess terrains during spring thawing".JOURNAL OF MOUNTAIN SCIENCE 15.4(2018):845-858. |
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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