Mechanical state of gravel soil in mobilization of rainfall-induced landslides in the Wenchuan seismic area, Sichuan province, China
文献类型：期刊论文
| 作者 | Liao, Liping1,2,3; Yang, Yunchuan1,2,3; Yang, Zhiquan4; Zhu, Yingyan5,6 ; Hu, Jin5,6; Zou, D. H. Steve7
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| 刊名 | EARTH SURFACE DYNAMICS
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| 出版日期 | 2018-08-03 |
| 卷号 | 6期号:3页码:637-649 |
| ISSN号 | 2196-6311 |
| DOI | 10.5194/esurf-6-637-2018 |
| 英文摘要 | Gravel soils generated by the Wenchuan earthquake have undergone natural consolidation for the past decade. However, geological hazards, such as slope failures with ensuing landslides, have continued to pose great threats to the region. In this paper, artificial model tests were used to observe the changes of soil moisture content and pore water pressure, as well as macroscopic and microscopic phenomena of gravel soil. In addition, a mathematical formula of the critical state was derived from the triaxial test data. Finally, the mechanical states of gravel soil were determined. The results had five aspects. (1) The time and mode of the occurrence of landslides were closely related to the initial dry density. The process of initiation was accompanied by changes in density and void ratio. (2) The migration of fine particles and the rearrangement of coarse-fine particles contributed to the reorganization of the microscopic structure, which might be the main reason for the variation of dry density and void ratio. (3) If the confining pressure were the same, the void ratios of soils with constant particle composition would approach approximately critical values. (4) Mechanical state of gravel soil can be determined by the relative position between state parameter (e, P') and e(c)-p' planar critical state line, where e is the void ratio, e(c) is the critical void ratio and p' is the mean effective stress. (5) In the process of landslide initiation, dilatation and contraction were two types of gravel soil state, but dilatation was dominant. This paper provided insight into interpreting landslide initiation from the perspective of critical state soil mechanics. |
| 语种 | 英语 |
| WOS记录号 | WOS:000440725100001 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 源URL | [http://ir.imde.ac.cn/handle/131551/23490]  |
| 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 | Zhu, Yingyan |
| 作者单位 | 1.Guangxi Univ, Coll Civil Engn & Architecture, Nanning 530004, Peoples R China 2.Guangxi Univ, Minist Educ, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China 3.Guangxi Univ, Guangxi Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Peoples R China 4.Kunming Univ Sci & Technol, Fac Land Resource Engn, Kunming 650500, Yunnan, Peoples R China 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China 6.Minist Water Conservancy & Power, Chengdu 610041, Sichuan, Peoples R China 7.Dalhousie Univ, Dept Civil & Resource Engn, Halifax, NS B3H 4K5, Canada |
| 推荐引用方式 GB/T 7714 | Liao, Liping,Yang, Yunchuan,Yang, Zhiquan,et al. Mechanical state of gravel soil in mobilization of rainfall-induced landslides in the Wenchuan seismic area, Sichuan province, China[J]. EARTH SURFACE DYNAMICS,2018,6(3):637-649. |
| APA | Liao, Liping,Yang, Yunchuan,Yang, Zhiquan,Zhu, Yingyan,Hu, Jin,&Zou, D. H. Steve.(2018).Mechanical state of gravel soil in mobilization of rainfall-induced landslides in the Wenchuan seismic area, Sichuan province, China.EARTH SURFACE DYNAMICS,6(3),637-649. |
| MLA | Liao, Liping,et al."Mechanical state of gravel soil in mobilization of rainfall-induced landslides in the Wenchuan seismic area, Sichuan province, China".EARTH SURFACE DYNAMICS 6.3(2018):637-649. |
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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