Spatiotemporal characteristics of discontinuous soil failures on debris flow source slopes
文献类型：期刊论文
| 作者 | Guo, Xiaojun4,5 ; Li, Yong5; Cui, Peng4,5; Yan, Yan3; Wang, Baoliang2; Zhang, Jun1
|
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2021-12-20 |
| 卷号 | 295页码:13 |
| 关键词 | Slope failure Rainfall intensity Grain size distribution Soil heterogeneity Time series |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2021.106438 |
| 英文摘要 | Slope failures represent important supplies of material for debris flows, and field observations have indicated that failures across a slope are random and discontinuous. However, few studies have focused on the nature of successive failures. This study conducted field experiments on soil failure under artificial rainfall on slopes in two typical debris flow valleys, and established the random nature of the failure sequence that comprises a slope process. It was found that failures occur separately and intermittently on slopes. Furthermore, failure sequences under different rainfall and slope conditions have certain characteristics in common: 1) a failure sequence that comprises primarily random uncorrelated individual failures is independent of rainfall conditions; 2) the time interval between failures satisfies an exponential distribution, and the average length of the interval decreases with increasing rainfall intensity; and 3) the magnitude of failure fluctuates by up to three orders, from several to hundreds of volume units (10(-3) m(3)), and the distribution follows a power law whereby the total amount increases with increasing rainfall intensity. We propose that these properties are ascribed to the spatial heterogeneity of the soil, which can be described by the grain size distribution (GSD). The variation of GSD parameters across a slope determines the randomness, intermittency, and fluctuation of shallow failures. These findings support the development of scenarios for the occurrence of intermittent debris flow surges supplied by random failure sequences. |
| WOS关键词 | STABILITY ANALYSIS ; GRAIN COMPOSITION ; LANDSLIDES ; SIZE ; SAND |
| 资助项目 | Major Program of National Natural Science Foundation of China[41790432] ; Major Program of National Natural Science Foundation of China[41977257] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23090202] ; Joint Research Project of Sichuan Provincial Highway Planning, Survey and Design Research Institute Co., Ltd[2021-A-08] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000716926900017 |
| 出版者 | ELSEVIER |
| 资助机构 | Major Program of National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Joint Research Project of Sichuan Provincial Highway Planning, Survey and Design Research Institute Co., Ltd |
| 源URL | [http://ir.imde.ac.cn/handle/131551/56323]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Li, Yong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Yellow River Engn Consulting Co Ltd, Zhengzhou 450004, Peoples R China 3.Southwest Jiaotong Univ, Sch Civil Engn, Chengdu 610031, Peoples R China 4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Xiaojun,Li, Yong,Cui, Peng,et al. Spatiotemporal characteristics of discontinuous soil failures on debris flow source slopes[J]. ENGINEERING GEOLOGY,2021,295:13. |
| APA | Guo, Xiaojun,Li, Yong,Cui, Peng,Yan, Yan,Wang, Baoliang,&Zhang, Jun.(2021).Spatiotemporal characteristics of discontinuous soil failures on debris flow source slopes.ENGINEERING GEOLOGY,295,13. |
| MLA | Guo, Xiaojun,et al."Spatiotemporal characteristics of discontinuous soil failures on debris flow source slopes".ENGINEERING GEOLOGY 295(2021):13. |
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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