Long runout mechanism of the Shenzhen 2015 landslide: insights from a two-phase flow viewpoint

doi:10.1007/s11629-017-4595-5

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Long runout mechanism of the Shenzhen 2015 landslide: insights from a two-phase flow viewpoint
	Qiao Cheng1,2,3,4 ; Ou Guo-qiang1,2 ; Pan Hua-li1,2 ; Ouyang Chao-jun1,2 ; Jia Yang1,2,3
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018-10-01
卷号	15 期号:10 页码:2247-2265
关键词	Dynamics Landslide Long runout Pore pressure Two-phase
ISSN号	1672-6316
DOI	10.1007/s11629-017-4595-5
英文摘要	A catastrophic landslide occurred at Hongao dumpsite in Guangming New District of Shenzhen, South China, on December 20, 2015. An estimated total volume of 2.73x10(6) m(3) of construction spoils was mobilized during this event. The landslide traveled a long distance on a low-relief terrain. The affected area was approximately 1100 m in length and 630 m in width. This landslide made 33 buildings destroyed, 73 people died and 4 people lost. Due to the special dumping history and other factors, soil in this landfill is of high initial water content. To identify the major factors that attribute to the long runout character, a two-phase flow model of Iverson and George was used to simulate the dynamics of this landslide. The influence of initial hydraulic permeability, initial dilatancy, and earth pressure coefficient was examined through numerical simulations. We found that pore pressure has the most significant effect on the dynamic characteristics of Shenzhen landslides. Average pore pressure ratio of the whole basal surface was used to evaluate the degree of liquefaction for the sliding material. The evolution and influence factors of this ratio were analyzed based on the computational results. An exponential function was proposed to fit the evolution curve of the average pore pressure ratio, which can be used as a reasonable and simplified evaluation of the pore pressure. This fitting function can be utilized to improve the single-phase flow model.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000447295900013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/24048]
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	Pan Hua-li
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China 2.Chinese Acad Sci, Key Lab Mt Surface Proc & Hazards, Chengdu 610041, Sichuan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Anhui Univ Sci & Technol, Huainan 232001, Peoples R China
推荐引用方式 GB/T 7714	Qiao Cheng,Ou Guo-qiang,Pan Hua-li,et al. Long runout mechanism of the Shenzhen 2015 landslide: insights from a two-phase flow viewpoint[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(10):2247-2265.
APA	Qiao Cheng,Ou Guo-qiang,Pan Hua-li,Ouyang Chao-jun,&Jia Yang.(2018).Long runout mechanism of the Shenzhen 2015 landslide: insights from a two-phase flow viewpoint.JOURNAL OF MOUNTAIN SCIENCE,15(10),2247-2265.
MLA	Qiao Cheng,et al."Long runout mechanism of the Shenzhen 2015 landslide: insights from a two-phase flow viewpoint".JOURNAL OF MOUNTAIN SCIENCE 15.10(2018):2247-2265.