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Mechanical state of gravel soil in mobilization of rainfall-induced landslides in the Wenchuan seismic area, Sichuan province, China
Liao, Liping1,2,3; Yang, Yunchuan1,2,3; Yang, Zhiquan4; Zhu, Yingyan5,6; Hu, Jin5,6; Zou, D. H. Steve7
2018
Source PublicationEARTH SURFACE DYNAMICS
ISSN2196-6311
EISSN2196-632X
Volume6Issue:3Pages:637-649
SubtypeArticle
AbstractGravel 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.
DOI10.5194/esurf-6-637-2018
Indexed BySCI
WOS KeywordDEBRIS FLOWS ; SHALLOW LANDSLIDES ; EARTHQUAKE ; FAILURE ; SLOPE ; MODEL
Language英语
Quartile3区
Funding ProjectNational Natural Science Foundation of China[41071058] ; National Natural Science Foundation of China[41402272] ; National Natural Science Foundation of China[51609041] ; Disaster Prevention and Mitigation and Engineering Safety Key Laboratory Project of Guangxi Province[2016ZDX09] ; Natural Scientific Project of Guangxi Zhuang Autonomous Region[2018GXNSFAA138187]
TOP
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000440725100001
Funding OrganizationNational Natural Science Foundation of China ; Disaster Prevention and Mitigation and Engineering Safety Key Laboratory Project of Guangxi Province ; Natural Scientific Project of Guangxi Zhuang Autonomous Region
PublisherCOPERNICUS GESELLSCHAFT MBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23490
Collection山地灾害与地表过程重点实验室
Corresponding AuthorZhu, Yingyan
Affiliation1.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
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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