Mechanism of the December 2015 Catastrophic Landslide at the Shenzhen Landfill and Controlling Geotechnical Risks of Urbanization

doi:10.1016/J.ENG.2016.02.005

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	Mechanism of the December 2015 Catastrophic Landslide at the Shenzhen Landfill and Controlling Geotechnical Risks of Urbanization
	Yin, Yueping 1; Li, Bin 3; Wang, Wenpei 1; Zhan, Liangtong 2; Xue, Qiang4 ; Gao, Yang 3; Zhang, Nan 1; Chen, Hongqi 1; Liu, Tiankui 6; Li, Aiguo 5
刊名	ENGINEERING
	2016
卷号	2 期号:2 页码:230-249
关键词	Construction solid waste (CSW) Landfill landslide Factor of safety (FOS) Geotechnical risk
ISSN号	2095-8099
DOI	10.1016/J.ENG.2016.02.005
英文摘要	This paper presents findings from an investigation of the large-scale construction solid waste (CSW) landslide that occurred at a landfill at Shenzhen, Guangdong, China, on December 20, 2015, and which killed 77 people and destroyed 33 houses. The landslide involved 2.73 x 10(6) m(3) of CSW and affected an area about 1100 m in length and 630 m in maximum width, making it the largest landfill landslide in the world. The investigation of this disaster used a combination of unmanned aerial vehicle surveillance and multistage remote-sensing images to reveal the increasing volume of waste in the landfill and the shifting shape of the landfill slope for nearly two years before the landslide took place, beginning with the creation of the CSW landfill in March, 2014, that resulted in the uncertain conditions of the landfill's boundaries and the unstable state of the hydrologic performance. As a result, applying conventional stability analysis methods used for natural landslides to this case would be difficult. In order to analyze this disaster, we took a multistage modeling technique to analyze the varied characteristics of the landfill slope's structure at various stages of CSW dumping and used the non-steady flow theory to explain the groundwater seepage problem. The investigation showed that the landfill could be divided into two units based on the moisture in the land:. a front uint, consisted of the landfill slope, which had low water content; and. a rear unit, consisted of fresh waste, which had a high water content. This structure caused two effects-surface-water infiltration and consolidation seepage that triggered the landslide in the landfill. Surface-water infiltration induced a gradual increase in pore water pressure head, or piezometric head, in the front slope because the infiltrating position rose as the volume of waste placement increased. Consolidation seepage led to higher excess pore water pressures as the loading of waste increased. We also investigated the post-failure soil dynamics parameters of the landslide deposit using cone penetration, triaxial, and ring-shear tests in order to simulate the characteristics of a flowing slide with a long run-out due to the liquefaction effect. Finally, we conclude the paper with lessons from the tens of catastrophic landslides of municipal solid waste around the world and discuss how to better manage the geotechnical risks of urbanization. (C) 2016 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000392917400013
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3884]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.China Geol Survey, China Inst Geoenvironm Monitoring ; 2.Zhejiang Univ, MOE Key Lab Soft Soils & Geoenvironm Engn; 3.Chinese Acad Geol Sci, China Geol Survey, Inst Geomech ; 4.Chinese Acad Sci, Inst Rock & Soil Mech ; 5.Shenzhen Geotech Invest & Surveying Inst Co Ltd 6.Shenzhen Municipal, Urban Planning Land & Resources Commis;
推荐引用方式 GB/T 7714	Yin, Yueping,Li, Bin,Wang, Wenpei,et al. Mechanism of the December 2015 Catastrophic Landslide at the Shenzhen Landfill and Controlling Geotechnical Risks of Urbanization[J]. ENGINEERING,2016,2(2):230-249.
APA	Yin, Yueping.,Li, Bin.,Wang, Wenpei.,Zhan, Liangtong.,Xue, Qiang.,...&Li, Aiguo.(2016).Mechanism of the December 2015 Catastrophic Landslide at the Shenzhen Landfill and Controlling Geotechnical Risks of Urbanization.ENGINEERING,2(2),230-249.
MLA	Yin, Yueping,et al."Mechanism of the December 2015 Catastrophic Landslide at the Shenzhen Landfill and Controlling Geotechnical Risks of Urbanization".ENGINEERING 2.2(2016):230-249.