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A Case Study of the Rapid and Long Runout Landslide at Hong'ao Waste Disposal Site in Shenzhen, China
Wang Kai1; Zhang Shaojie2; Wei Fangqiang3; Yang Hongjuan2
Corresponding AuthorWei, Fangqiang(fqwei@imde.ac.cn)
2020
Source PublicationKSCE JOURNAL OF CIVIL ENGINEERING
ISSN1226-7988
EISSN1976-3808
Volume24Issue:3Pages:727-739
SubtypeArticle
Contribution Rank2
AbstractA disastrous landslide occurred at the Hong'ao Waste Disposal Site in Shenzhen, China on December 20, 2015, involving a volume of 2.7 x 10(6) m(3) of municipal solid waste (MSW) that travelled a distance of 700 to 800 m, covering an area of 3.8 x 10(5) m(2) and caused 90 casualties. The geomorphological and geological characteristics of the waste disposal site were carefully examined and the landslide was classified as an extremely rapid flowslide. The major feature of the waste site was the basin-like structure with the bottom composed of low-permeable granite bedrock. Therefore, surface runoff could easily accumulate in the MSW due to the lack of drainage system, resulting in an increasing groundwater level. Laboratory tests, including physical characterization, Consolidation Isotropic Undrained (CIU) test and direct shear test were conducted to characterize the material properties of the MSW. Physical characterization indicated the MSW belongs to sandy silt, CIU tests indicated that static liquefaction was conducive to high-speed sliding. The direct shear test data were used to carry out numerical analysis of slope stability, in which the continuous rise in the groundwater level was taken into account. Numerical simulation showed that the pore water pressure induced by underground water seepage and gradual loading from the upper MSW placement aggravate the failure. Consequently, the main reason of the landslide could be concluded as follows: 1) the perched groundwater level due to a large upstream catchment area and the lack of drainage system; 2) the excess pore water pressure induced by static liquefaction played a significant role in its mobility.
KeywordWaste disposal site Municipal solid waste Landslide Static liquefaction Groundwater table
DOI10.1007/s12205-020-1399-x
Indexed BySCI
WOS KeywordFLOW ; LIQUEFACTION ; INSTABILITY ; LANDFILL
Language英语
Funding ProjectNational Key Research and Development Program of China[2018YFC1505503] ; Science and Technology Service Network Initiative[KFJ-SW-STS-180] ; Key Scientific Research project of Higher Education Institutions, Henan Province, China[20A560024]
WOS Research AreaEngineering
WOS SubjectEngineering, Civil
WOS IDWOS:000511053100003
Funding OrganizationNational Key Research and Development Program of China ; Science and Technology Service Network Initiative ; Key Scientific Research project of Higher Education Institutions, Henan Province, China
PublisherKOREAN SOCIETY OF CIVIL ENGINEERS-KSCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33869
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorWei Fangqiang
Affiliation1.Institute of Civil Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China;
2.Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
3.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
Recommended Citation
GB/T 7714
Wang Kai,Zhang Shaojie,Wei Fangqiang,et al. A Case Study of the Rapid and Long Runout Landslide at Hong'ao Waste Disposal Site in Shenzhen, China[J]. KSCE JOURNAL OF CIVIL ENGINEERING,2020,24(3):727-739.
APA Wang Kai,Zhang Shaojie,Wei Fangqiang,&Yang Hongjuan.(2020).A Case Study of the Rapid and Long Runout Landslide at Hong'ao Waste Disposal Site in Shenzhen, China.KSCE JOURNAL OF CIVIL ENGINEERING,24(3),727-739.
MLA Wang Kai,et al."A Case Study of the Rapid and Long Runout Landslide at Hong'ao Waste Disposal Site in Shenzhen, China".KSCE JOURNAL OF CIVIL ENGINEERING 24.3(2020):727-739.
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